# Accessibility bug reports — www.cdc.gov, week 2026-W39

80 issue type(s) from 3333 pages scanned. Generated 2026-09-30 by [vital-scans](https://github.com/mgifford/vital-core), following [accessibility bug-reporting best practices](https://mgifford.github.io/ACCESSIBILITY.md/examples/ACCESSIBILITY_BUG_REPORTING_BEST_PRACTICES.html).

> Automated checks find roughly a third of accessibility barriers. Fields marked "requires manual testing" cannot be observed by an automated scan and need a human with assistive technology.

---
## Target size is at least 24×24 CSS pixels or has spacing (Minimum) (WCAG 2.5.8)

**Bug ID:** `VS-3a2f6862`  
**Pattern ID:** `VS-179ad9b3`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<a href="#content_area">`  
**WCAG SC:** 2.5.8 — Target Size (Minimum) (Level AA)  
**Rule:** Siteimprove Alfa — `sia-r113` ([reference](https://alfa.siteimprove.com/rules/sia-r113))  
**Severity:** Moderate  
**Frequency:** 2613 instances; 265 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 265 of 3333 scanned pages (2613 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <a href="#content_area">
3. Confirm the Siteimprove Alfa finding for rule sia-r113 against WCAG 2.5.8 Target Size (Minimum).

### Impact
Affects Limited manipulation/strength (13.0%), Limited reach (2.0%), Limited vision (2.4%).
- **Limited manipulation/strength** (13.0% of population)
- **Limited reach** (2.0% of population)
- **Limited vision** (2.4% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/niosh/npg/npgd0430.html
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- http://www.cdc.gov/niosh/npg/npgd0556.html
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- https://www.cdc.gov/niosh/npg/npgd0602.html
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- https://www.cdc.gov/brfss/acbs/2016_documentation.html
- https://www.cdc.gov/laboratory/specimen-submission/detail.html
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm

…and more — 265 pages total ([download CSV](csv/alfa__sia-r113.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r113

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Accessible name of link or button matches visible label (WCAG 2.5.3)

**Bug ID:** `VS-62438c2a`  
**Pattern ID:** `VS-f7dba940`  
**URL:** https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html  
**XPath / selector:** `<a href="/investigate-legionella/index.html" class="cdc-footer__super-title" aria-label="Investigating Legionnaires' Disease">`  
**WCAG SC:** 2.5.3 — Label in Name (Level A)  
**Rule:** Siteimprove Alfa — `sia-r14` ([reference](https://alfa.siteimprove.com/rules/sia-r14))  
**Severity:** Moderate  
**Frequency:** 126 instances; 72 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 72 of 3333 scanned pages (126 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html.
2. Locate the element: <a href="/investigate-legionella/index.html" class="cdc-footer__super-title" aria-label="Investigating Legionnaires' Disease">
3. Confirm the Siteimprove Alfa finding for rule sia-r14 against WCAG 2.5.3 Label in Name.

### Impact
Affects Without vision (1.0%), Without speech (0.5%).
- **Without vision** (1.0% of population)
- **Without speech** (0.5% of population)

### Affected pages
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- https://www.cdc.gov/united-states-cancer-statistics/technical-notes/relative-cancer-survival.html
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html
- http://www.cdc.gov/pneumonia/es/about/acerca-de-la-neumonia.html
- http://www.cdc.gov/spanish/niosh/docs/2007-133_sp
- https://www.cdc.gov/natural-disasters/communication-resources/finding-a-new-normal-life-after-a-natural-disaster-marianas-story-poster.html
- http://www.cdc.gov/niosh/publications/es/numbered/2010-119sp.html
- https://www.cdc.gov/partners/site.html
- http://www.cdc.gov/global-health/countries/central-america.html
- https://www.cdc.gov/rdc/b1datatype/dt1224e.htm
- https://www.cdc.gov/salmonella/outbreaks/typhimurium-12-22/index.html
- https://www.cdc.gov/spanish/CDC/enlacese.html
- https://www.cdc.gov/nhsn/covid19/ltc-vaccination-dashboard.html
- https://www.cdc.gov/salmonella/outbreaks/onions-10-23/timeline.html
- http://www.cdc.gov/nora/councils/mining.html
- https://www.cdc.gov/whole-school-community-child/strategies/strategies-nutrition.html
- https://www.cdc.gov/lung-cancer/es/screening/index.html
- http://www.cdc.gov/hi-disease/es/risk-factors/factores-de-riesgo-de-la-enfermedad-por-haemophilusinfluenzae.html
- http://www.cdc.gov/cancer-survivors/es/healthy-living-guides/how-to-cope-with-your-feelings.html
- https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html
- http://www.cdc.gov/diabetes/spanish/living/mental-health.html
- http://www.cdc.gov/niosh/publications/es/numbered/2012-130sp.html
- https://www.cdc.gov/ccindex/everydaywords/index.html?word=Range

…and more — 72 pages total ([download CSV](csv/alfa__sia-r14.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r14

### Example pages
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html

---

## Images must have alternative text (WCAG 1.1.1)

**Bug ID:** `VS-8348d51e`  
**Pattern ID:** `VS-9074b4dd`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm  
**XPath / selector:** `td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** axe-core — `image-alt` ([reference](https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 6648 instances; 588 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">
```

### Description
Images must have alternative text. Detected by axe-core rule image-alt on 588 of 3333 scanned pages (6648 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm.
2. Locate the element: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
3. Confirm the axe-core finding for rule image-alt against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00001036.htm
- http://www.cdc.gov/pcd/issues/2004/apr/toc.htm
- https://www.cdc.gov/pcd/issues/2009/jul/cover.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5531a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001558.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00048598.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4837a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm

…and more — 588 pages total ([download CSV](csv/axe-core__image-alt.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm

---

## Image has accessible name (WCAG 1.1.1)

**Bug ID:** `VS-832b8e1a`  
**Pattern ID:** `VS-a24eaa8c`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<img src="../../images/spacer.gif" width="10" height="1" alt=" ">`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** Siteimprove Alfa — `sia-r2` ([reference](https://alfa.siteimprove.com/rules/sia-r2))  
**Severity:** Moderate  
**Frequency:** 1955 instances; 161 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 161 of 3333 scanned pages (1955 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <img src="../../images/spacer.gif" width="10" height="1" alt=" ">
3. Confirm the Siteimprove Alfa finding for rule sia-r2 against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055332.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5021a3.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0205_fr.htm

…and more — 161 pages total ([download CSV](csv/alfa__sia-r2.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give every <img> an accessible name (alt text), or alt="" if purely decorative.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r2

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Certain ARIA roles must contain particular children (WCAG 1.3.1)

**Bug ID:** `VS-1eced265`  
**Pattern ID:** `VS-9429bb8d`  
**URL:** https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344  
**XPath / selector:** `#accordion-7`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `aria-required-children` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-required-children?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 2 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (13 weeks)

### HTML snippet
```html
<div class="accordion indicator-plus accordion-white mb3" id="accordion-7" role="tablist">
```

### Description
Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344.
2. Locate the element: #accordion-7
3. Confirm the axe-core finding for rule aria-required-children against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Add the child roles this container role requires (e.g. a list needs listitem children).

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-required-children?application=axeAPI

---

## <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1)

**Bug ID:** `VS-9b219d21`  
**Pattern ID:** `VS-a0bdbdf6`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm  
**XPath / selector:** `ol`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `list` ([reference](https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 40 instances; 24 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<ol>
```

### Description
<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 24 of 3333 scanned pages (40 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm.
2. Locate the element: ol
3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5427a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00026330.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001661.htm
- https://www.cdc.gov/niosh/ocas/awedocs.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001880.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00039562.htm
- https://www.cdc.gov/niosh/docs/2015-115
- https://www.cdc.gov/wtc/newsYouthCohortUpdate_20241001.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su48a7.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00016579.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00021441.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr4813a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001728.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00048084.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00047449.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00016506.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001115.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00044993.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00015783.htm
- https://www.cdc.gov/wtc/ppm.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001848.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5317a2.htm
- https://www.cdc.gov/bird-flu/worker-safety/personal-protective-equipment.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use <ul>/<ol> with only <li> children for lists; don't fake lists with <div>s.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5427a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00026330.htm

---

## Table cell headers attributes must refer to other <th> elements in the same tabl (WCAG 1.3.1)

**Bug ID:** `VS-e63860b6`  
**Pattern ID:** `VS-07ba3b17`  
**URL:** http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html  
**XPath / selector:** `table`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `td-headers-attr` ([reference](https://dequeuniversity.com/rules/axe/4.12/td-headers-attr?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 31 instances; 19 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (15 weeks)

### HTML snippet
```html
<table align="center" border="1" cellpadding="7" cellspacing="0" class="opt-in table table-bordered">
```

### Description
Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 19 of 3333 scanned pages (31 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html.
2. Locate the element: table
3. Confirm the axe-core finding for rule td-headers-attr against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- https://www.cdc.gov/acip/grade/CYD-TDV-dengue-vaccine.html
- http://www.cdc.gov/vaccines/imz-schedules/adolescent-easyread.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- https://www.cdc.gov/asthma/nhis/2021/table4-2.htm
- https://www.cdc.gov/brfss/acbs/2017/multiple_year/acbs_prevalence_15-17_table6.html
- http://www.cdc.gov/surv-manual/php/table-of-contents/chapter-13-rotavirus.html
- https://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table11b.html
- http://www.cdc.gov/immigrant-refugee-health/hcp/panel-physicians/vaccination.html
- https://www.cdc.gov/brfss/acbs/2011/prevalence_tables/table12.html
- http://www.cdc.gov/asthma/nhis/2020/table2-1.htm
- http://www.cdc.gov/acip/grade/covid-19-pfizer-age-5-11-eua.html
- https://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table12_LLCP.html
- https://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table1_LLCP.html
- http://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table10_LLCP.html
- http://www.cdc.gov/brfss/acbs/2009/prevalence_tables/table4b.html
- https://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table11a.html
- http://www.cdc.gov/brfss/acbs/2009/prevalence_tables/table10.html
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table1.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Associate data cells with their headers correctly using headers/id or scope.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/td-headers-attr?application=axeAPI

### Example pages
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- https://www.cdc.gov/acip/grade/CYD-TDV-dengue-vaccine.html
- http://www.cdc.gov/vaccines/imz-schedules/adolescent-easyread.html

---

## <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1)

**Bug ID:** `VS-b937d506`  
**Pattern ID:** `VS-6175596b`  
**URL:** http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html  
**XPath / selector:** `.table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > li`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `listitem` ([reference](https://dequeuniversity.com/rules/axe/4.12/listitem?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 13 instances; 3 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<li><strong>Number of Hospitalizations</strong></li>
```

### Description
<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 3 of 3333 scanned pages (13 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html.
2. Locate the element: .table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > li
3. Confirm the axe-core finding for rule listitem against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html
- https://www.cdc.gov/niosh/ergonomics/ergo-programs/involve-train.html
- https://www.cdc.gov/niosh/ocas/awedocs.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** <li> must be inside a <ul> or <ol>.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/listitem?application=axeAPI

### Example pages
- http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html
- https://www.cdc.gov/niosh/ergonomics/ergo-programs/involve-train.html
- https://www.cdc.gov/niosh/ocas/awedocs.html

---

## Presentational children of an element are not focusable (WCAG 1.3.1)

**Bug ID:** `VS-2f533463`  
**Pattern ID:** `VS-d6097011`  
**URL:** https://www.cdc.gov/niosh/topics/opioids/default.html  
**XPath / selector:** `<ul>`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r68` ([reference](https://alfa.siteimprove.com/rules/sia-r68))  
**Severity:** Moderate  
**Frequency:** 653 instances; 65 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 65 of 3333 scanned pages (653 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/niosh/topics/opioids/default.html.
2. Locate the element: <ul>
3. Confirm the Siteimprove Alfa finding for rule sia-r68 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html
- http://www.cdc.gov/healthy-youth/hecat/2021-edition.html
- http://www.cdc.gov/cancer-survivors/healthy-living-guides/eating-healthy.html
- https://www.cdc.gov/antimicrobial-resistance/stories/global-projects-slow-ar.html
- https://www.cdc.gov/rdc/b1datatype/dt1224e.htm
- https://www.cdc.gov/healthy-swimming/toolkit/operating-public-pools-hot-tubs-and-splash-pads.html
- https://www.cdc.gov/narms/stories/index.html
- http://www.cdc.gov/global-health-ieta/php/eligibility/applying-for-ieta.html
- http://www.cdc.gov/hepatitis-a/outbreaks/person-to-person/index.html
- http://www.cdc.gov/niosh/anthropometry/about
- https://www.cdc.gov/alcohol/onlinemedia/social-media.htm
- https://www.cdc.gov/niosh/docs/2015-115
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- http://www.cdc.gov/nchs/updates
- http://www.cdc.gov/injection-safety/hcp/clinical-safety/index.html
- http://www.cdc.gov/cancer-survivors/es/healthy-living-guides/how-to-cope-with-your-feelings.html
- http://www.cdc.gov/inflammatory-bowel-disease/programs/index.html
- http://www.cdc.gov/diabetes/spanish/living/mental-health.html
- https://www.cdc.gov/pcd/issues/2013/12_0131.htm
- https://www.cdc.gov/vaginal-vulvar-cancers/es/about/index.html
- https://www.cdc.gov/adultvaxview/about/pregnant-women.html
- https://www.cdc.gov/finance/conference-report/2016-spending-report.html

…and more — 65 pages total ([download CSV](csv/alfa__sia-r68.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r68

### Example pages
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html

---

## Element has required owned roles (WCAG 1.3.1)

**Bug ID:** `VS-fd467759`  
**Pattern ID:** `VS-3c632d31`  
**URL:** http://www.cdc.gov/nchs/products/index.htm  
**XPath / selector:** `<h2>`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r64` ([reference](https://alfa.siteimprove.com/rules/sia-r64))  
**Severity:** Moderate  
**Frequency:** 13 instances; 13 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Element has required owned roles. Detected by Siteimprove Alfa rule sia-r64 on 13 of 3333 scanned pages (13 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/nchs/products/index.htm.
2. Locate the element: <h2>
3. Confirm the Siteimprove Alfa finding for rule sia-r64 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/nchs/products/index.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5420a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5114a1.htm
- https://www.cdc.gov/nchs/nsfg/nsfg_2017_2019_puf.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5407a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5246a5.htm
- https://www.cdc.gov/healthcare-associated-infections/php/research/mdro-projects.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5344a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5605a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5213a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5412a6.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5350a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5242a8.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r64

### Example pages
- http://www.cdc.gov/nchs/products/index.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5420a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5114a1.htm

---

## Table cell has header (WCAG 1.3.1)

**Bug ID:** `VS-07458551`  
**Pattern ID:** `VS-3f067795`  
**URL:** https://www.cdc.gov/niosh/nmam/cas.html  
**XPath / selector:** `<td>`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r77` ([reference](https://alfa.siteimprove.com/rules/sia-r77))  
**Severity:** Moderate  
**Frequency:** 3960 instances; 8 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Table cell has header. Detected by Siteimprove Alfa rule sia-r77 on 8 of 3333 scanned pages (3960 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/niosh/nmam/cas.html.
2. Locate the element: <td>
3. Confirm the Siteimprove Alfa finding for rule sia-r77 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/niosh/nmam/cas.html
- https://www.cdc.gov/vision-health-data/prevalence-estimates/vision-loss-prevalence.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week03.htm
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week12.htm
- https://www.cdc.gov/brfss/acbs/2017/files/acbs_2017_adult_public_llcp_codebook-508.html
- http://www.cdc.gov/nchs/data_access/urban_rural.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6020md.htm?s_cid=mm6020md_w

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r77

### Example pages
- https://www.cdc.gov/niosh/nmam/cas.html
- https://www.cdc.gov/vision-health-data/prevalence-estimates/vision-loss-prevalence.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html

---

## Element has required aria-owns (WCAG 1.3.1)

**Bug ID:** `VS-cd4125cb`  
**Pattern ID:** `VS-4408605e`  
**URL:** https://www.cdc.gov/brfss/acbs/2020/prevalence_tables/table5_LLCP.html  
**XPath / selector:** `<th class="text-left" headers="State" scope="row">`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r46` ([reference](https://alfa.siteimprove.com/rules/sia-r46))  
**Severity:** Moderate  
**Frequency:** 184 instances; 8 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (15 weeks)

### Description
Element has required aria-owns. Detected by Siteimprove Alfa rule sia-r46 on 8 of 3333 scanned pages (184 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/brfss/acbs/2020/prevalence_tables/table5_LLCP.html.
2. Locate the element: <th class="text-left" headers="State" scope="row">
3. Confirm the Siteimprove Alfa finding for rule sia-r46 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/brfss/acbs/2020/prevalence_tables/table5_LLCP.html
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- http://www.cdc.gov/hepatitis-a/outbreaks/person-to-person/index.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- http://www.cdc.gov/pcd/issues/2005/apr/04_0115.htm
- https://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table11b.html
- https://www.cdc.gov/brfss/acbs/2011/prevalence_tables/table12.html
- http://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-b/table-2-3.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r46

### Example pages
- https://www.cdc.gov/brfss/acbs/2020/prevalence_tables/table5_LLCP.html
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- http://www.cdc.gov/hepatitis-a/outbreaks/person-to-person/index.html

---

## aria-hidden element is not exposed to assistive technology (WCAG 1.3.1)

**Bug ID:** `VS-712642bb`  
**Pattern ID:** `VS-9207ed51`  
**URL:** http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html  
**XPath / selector:** `@headers="CurrentSE row41 "`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r45` ([reference](https://alfa.siteimprove.com/rules/sia-r45))  
**Severity:** Moderate  
**Frequency:** 1100 instances; 4 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (14 weeks)

### Description
aria-hidden element is not exposed to assistive technology. Detected by Siteimprove Alfa rule sia-r45 on 4 of 3333 scanned pages (1100 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html.
2. Locate the element: @headers="CurrentSE row41 "
3. Confirm the Siteimprove Alfa finding for rule sia-r45 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- https://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table11b.html
- https://www.cdc.gov/brfss/acbs/2011/prevalence_tables/table12.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r45

### Example pages
- http://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table8a.html
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- https://www.cdc.gov/brfss/acbs/2010/prevalence_tables/table11b.html

---

## Info and Relationships (WCAG 1.3.1)

**Bug ID:** `VS-0c04b4dc`  
**Pattern ID:** `VS-33b49e3b`  
**URL:** https://www.cdc.gov/vision-health-data/prevalence-estimates/vision-loss-prevalence.html  
**XPath / selector:** `<th>`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r76` ([reference](https://alfa.siteimprove.com/rules/sia-r76))  
**Severity:** Moderate  
**Frequency:** 4 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W26, last seen 2026-W39 (10 weeks)

### Description
Info and Relationships. Detected by Siteimprove Alfa rule sia-r76 on 1 of 3333 scanned pages (4 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/vision-health-data/prevalence-estimates/vision-loss-prevalence.html.
2. Locate the element: <th>
3. Confirm the Siteimprove Alfa finding for rule sia-r76 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/vision-health-data/prevalence-estimates/vision-loss-prevalence.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r76

---

## Links must be distinguishable without relying on color (WCAG 1.4.1)

**Bug ID:** `VS-5580854e`  
**Pattern ID:** `VS-8ade3360`  
**URL:** https://www.cdc.gov/infection-control/hcp/cauti/recommendations-for-further-research.html  
**XPath / selector:** `.all-pages`  
**WCAG SC:** 1.4.1 — Use of Color (Level A)  
**Rule:** axe-core — `link-in-text-block` ([reference](https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 66 instances; 60 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<a class="all-pages" href="#toc">All pages <span class="cdc-fa-arrow-down-long"></span></a>
```

### Description
Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 60 of 3333 scanned pages (66 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/infection-control/hcp/cauti/recommendations-for-further-research.html.
2. Locate the element: .all-pages
3. Confirm the axe-core finding for rule link-in-text-block against WCAG 1.4.1 Use of Color.

### Impact
Affects Without color perception (4.5%), Limited vision (2.4%).
- **Without color perception** (4.5% of population)
- **Limited vision** (2.4% of population)

### Affected pages
- https://www.cdc.gov/infection-control/hcp/cauti/recommendations-for-further-research.html
- https://www.cdc.gov/ccindex/everydaywords/index.html?word=Capacity
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6026a4.htm
- http://www.cdc.gov/hepatitis-surveillance-2022/hepatitis-c/table-3-7.html
- https://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-b/table-2-6.html
- http://www.cdc.gov/grants/already-have-grant/prior-approval-requests.html
- https://www.cdc.gov/ccindex/everydaywords/index.html?word=Risk
- https://www.cdc.gov/hepatitis-surveillance-2022/appendix/table-5-2.html
- https://www.cdc.gov/infection-control/hcp/intravascular-catheter-related-infection/references.html
- http://www.cdc.gov/hearing-loss-children-guide/parents-guide/resources.html
- https://www.cdc.gov/uti/hcp/clinical-guidance/culture-stewardship-structure.html
- https://www.cdc.gov/hepatitis-surveillance-2022/hepatitis-c/table-3-6.html?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Fhepatitis%2Fstatistics%2F2022surveillance%2Fhepatitis-c%2Ftable-3.6.htm
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-c/figure-3.5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6305a6.htm
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-b/table-2.5.htm
- http://www.cdc.gov/hepatitis/php/surveillance-guidance/acknowledgements.html
- https://www.cdc.gov/act-early/milestones/5-years.html
- http://www.cdc.gov/infection-control/hcp/norovirus-guidelines/references.html
- https://www.cdc.gov/grants/additional-requirements/ar-17.html
- http://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-6.html
- https://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-c/figure-3-1.html
- https://www.cdc.gov/infection-control/hcp/intravascular-catheter-related-infections/authors.html
- https://www.cdc.gov/hearing-loss-children-guide/parents-guide-genetics/interventions-for-hearing-loss.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6001a1.htm

…and more — 60 pages total ([download CSV](csv/axe-core__link-in-text-block.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI

### Example pages
- https://www.cdc.gov/infection-control/hcp/cauti/recommendations-for-further-research.html
- https://www.cdc.gov/ccindex/everydaywords/index.html?word=Capacity
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html

---

## Link in text block is visually distinguishable without color (WCAG 1.4.1)

**Bug ID:** `VS-ddc35cae`  
**Pattern ID:** `VS-efd91fdd`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5935a4.htm  
**XPath / selector:** `<a href="http://www.cdc.gov/vitalsigns">`  
**WCAG SC:** 1.4.1 — Use of Color (Level A)  
**Rule:** Siteimprove Alfa — `sia-r62` ([reference](https://alfa.siteimprove.com/rules/sia-r62))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (14 weeks)

### Description
Link in text block is visually distinguishable without color. Detected by Siteimprove Alfa rule sia-r62 on 1 of 3333 scanned pages (1 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5935a4.htm.
2. Locate the element: <a href="http://www.cdc.gov/vitalsigns">
3. Confirm the Siteimprove Alfa finding for rule sia-r62 against WCAG 1.4.1 Use of Color.

### Impact
Affects Without color perception (4.5%), Limited vision (2.4%).
- **Without color perception** (4.5% of population)
- **Limited vision** (2.4% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5935a4.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Make links visually distinguishable from surrounding text (not by color alone).

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r62

---

## Scrollable region must have keyboard access (WCAG 2.1.1)

**Bug ID:** `VS-275401b4`  
**Pattern ID:** `VS-c613c153`  
**URL:** http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html  
**XPath / selector:** `.dfe-section:nth-child(3) > .cdc_page_element.dfe-block.dfe-block--cdcmodule > .dfe-block__inner > .cdc-textblock > .table-responsive > div`  
**WCAG SC:** 2.1.1 — Keyboard (Level A)  
**Rule:** axe-core — `scrollable-region-focusable` ([reference](https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 30 instances; 25 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<div style="overflow-x: auto;">
```

### Description
Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 25 of 3333 scanned pages (30 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html.
2. Locate the element: .dfe-section:nth-child(3) > .cdc_page_element.dfe-block.dfe-block--cdcmodule > .dfe-block__inner > .cdc-textblock > .table-responsive > div
3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

### Impact
Affects Without vision (1.0%), Limited manipulation/strength (13.0%), Limited reach (2.0%).
- **Without vision** (1.0% of population)
- **Limited manipulation/strength** (13.0% of population)
- **Limited reach** (2.0% of population)

### Affected pages
- http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- http://www.cdc.gov/hepatitis-surveillance-2022/hepatitis-c/table-3-7.html
- https://www.cdc.gov/fluview/surveillance/2024-week-45.html
- http://www.cdc.gov/malaria/php/surveillance-report/2022.html
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-b/table-2.5.htm
- https://www.cdc.gov/acip/grade/CYD-TDV-dengue-vaccine.html
- https://www.cdc.gov/mmwr/volumes/65/wr/mm6544a3.htm?s_cid=mm6544a3_w
- http://www.cdc.gov/tb/statistics/reports/2022/table21.htm
- https://www.cdc.gov/ohhabs/data/summary-report-united-states-2019.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-g.html
- http://www.cdc.gov/nhsn/cdaportal/faqs.html
- https://www.cdc.gov/tb/statistics/reports/2022/table7.htm
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week03.htm
- http://www.cdc.gov/surv-manual/php/table-of-contents/chapter-13-rotavirus.html
- http://www.cdc.gov/fluview/surveillance/2024-week-41.html
- http://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-a/table-1.1.htm
- http://www.cdc.gov/acip/grade/covid-19-pfizer-age-5-11-eua.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week12.htm
- http://www.cdc.gov/monkeypox/hcp/clinical-overview/index.html
- https://www.cdc.gov/mmwr/volumes/65/ss/ss6503a1.htm?s_cid=ss6503_w
- http://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- http://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-b/table-2-3.html
- http://www.cdc.gov/nchs/data_access/urban_rural.htm
- http://www.cdc.gov/flu/hcp/antivirals/summary-clinicians.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Make scrollable regions keyboard-focusable (tabindex="0") so keyboard users can scroll them.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI

### Example pages
- http://www.cdc.gov/foodborne-outbreaks/php/data-research/summary-2017-2020.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- http://www.cdc.gov/hepatitis-surveillance-2022/hepatitis-c/table-3-7.html

---

## Keyboard (WCAG 2.1.1)

**Bug ID:** `VS-6495c8d2`  
**Pattern ID:** `VS-58346bcf`  
**URL:** http://www.cdc.gov/lyme/hcp/clinical-care/lyme-carditis.html  
**XPath / selector:** `<table class="table fs08 table-bordered" style="width: 100%; height: 386px;">`  
**WCAG SC:** 2.1.1 — Keyboard (Level A)  
**Rule:** Siteimprove Alfa — `sia-r84` ([reference](https://alfa.siteimprove.com/rules/sia-r84))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W28, last seen 2026-W39 (9 weeks)

### Description
Keyboard. Detected by Siteimprove Alfa rule sia-r84 on 1 of 3333 scanned pages (1 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/lyme/hcp/clinical-care/lyme-carditis.html.
2. Locate the element: <table class="table fs08 table-bordered" style="width: 100%; height: 386px;">
3. Confirm the Siteimprove Alfa finding for rule sia-r84 against WCAG 2.1.1 Keyboard.

### Impact
Affects Without vision (1.0%), Limited manipulation/strength (13.0%), Limited reach (2.0%).
- **Without vision** (1.0% of population)
- **Limited manipulation/strength** (13.0% of population)
- **Limited reach** (2.0% of population)

### Affected pages
- http://www.cdc.gov/lyme/hcp/clinical-care/lyme-carditis.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r84

---

## <blink> elements are deprecated and must not be used (WCAG 2.2.2)

**Bug ID:** `VS-b6873206`  
**Pattern ID:** `VS-4b45acfe`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5415a2.htm  
**XPath / selector:** `blink`  
**WCAG SC:** 2.2.2 — Pause, Stop, Hide (Level A)  
**Rule:** axe-core — `blink` ([reference](https://dequeuniversity.com/rules/axe/4.12/blink?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 10 instances; 9 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (15 weeks)

### HTML snippet
```html
<blink><big><strong>Disclaimer</strong></big></blink>
```

### Description
<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 9 of 3333 scanned pages (10 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5415a2.htm.
2. Locate the element: blink
3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

### Impact
Affects Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5415a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001671.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5605a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5608a8.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5636a6.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5213a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5315a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a7.htm

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/blink?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5415a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001671.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm

---

## Links must have discernible text (WCAG 2.4.4)

**Bug ID:** `VS-3e91b255`  
**Pattern ID:** `VS-e9fe47ac`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm  
**XPath / selector:** `ol > a[href$="mm4818a1.htm"]`  
**WCAG SC:** 2.4.4 — Link Purpose (In Context) (Level A)  
**Rule:** axe-core — `link-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/link-name?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 798 instances; 239 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<a href="mm4818a1.htm">
        </a>
```

### Description
Links must have discernible text. Detected by axe-core rule link-name on 239 of 3333 scanned pages (798 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm.
2. Locate the element: ol > a[href$="mm4818a1.htm"]
3. Confirm the axe-core finding for rule link-name against WCAG 2.4.4 Link Purpose (In Context).

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/pcd/issues/2004/apr/toc.htm
- https://www.cdc.gov/pcd/issues/2009/jul/cover.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/volumes/65/su/su6503a10.htm?s_cid=su6503a10_w
- http://www.cdc.gov/pcd/issues/2007/oct/07_0147.htm
- http://www.cdc.gov/pcd/issues/2005/jan/04_0066.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- https://www.cdc.gov/niosh-rtecs/CZ8EF990.html
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0056_zht.htm
- https://www.cdc.gov/pcd/issues/2009/jan/08_0009_zht.htm
- http://www.cdc.gov/PCD/issues/2006/apr/05_0139_zht.htm
- http://www.cdc.gov/pcd/issues/2008/oct/07_0164_fr.htm
- https://www.cdc.gov/niosh-rtecs/XU3010B0.html
- http://www.cdc.gov/pcd/issues/2005/apr/04_0114_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0240_es.htm

…and more — 239 pages total ([download CSV](csv/axe-core__link-name.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the link discernible text. Avoid empty links and icon-only links without an aria-label.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-name?application=axeAPI

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Link has accessible name (WCAG 2.4.4)

**Bug ID:** `VS-eb9687ae`  
**Pattern ID:** `VS-28ebd979`  
**URL:** https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm  
**XPath / selector:** `<a href="http://www.cdc.gov/">`  
**WCAG SC:** 2.4.4 — Link Purpose (In Context) (Level A)  
**Rule:** Siteimprove Alfa — `sia-r11` ([reference](https://alfa.siteimprove.com/rules/sia-r11))  
**Severity:** Moderate  
**Frequency:** 171 instances; 69 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 69 of 3333 scanned pages (171 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm.
2. Locate the element: <a href="http://www.cdc.gov/">
3. Confirm the Siteimprove Alfa finding for rule sia-r11 against WCAG 2.4.4 Link Purpose (In Context).

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm
- http://www.cdc.gov/spanish/niosh/docs/2007-133_sp
- http://www.cdc.gov/pcd/issues/2008/apr/07_0205_fr.htm
- http://www.cdc.gov/PCD/issues/2010/may/09_0046_es.htm
- http://www.cdc.gov/pcd/issues/2006/apr/05_0216.htm
- http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm
- http://www.cdc.gov/pcd/issues/2005/jul/04_0126.htm
- https://www.cdc.gov/pcd/issues/2010/jul/09_0180.htm
- http://www.cdc.gov/PCD/issues/2010/may/09_0164_es.htm
- http://www.cdc.gov/pcd/issues/2007/oct/07_0076_es.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0120a.htm
- https://www.cdc.gov/iis/contacts-locate-records?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Fvaccines%2Fprograms%2Fiis%2Fcontacts-locate-records.html
- https://www.cdc.gov/pcd/issues/2011/mar/10_0103.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0111_es.htm
- http://www.cdc.gov/pcd/issues/2007/jan/06_0091_es.htm
- https://www.cdc.gov/nchs/products/databriefs/db259.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5921a3_ensp.htm

…and more — 69 pages total ([download CSV](csv/alfa__sia-r11.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the link an accessible name via text content or aria-label.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r11

### Example pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm

---

## <html> element must have a lang attribute (WCAG 3.1.1)

**Bug ID:** `VS-f9650d71`  
**Pattern ID:** `VS-c126b6a6`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm  
**XPath / selector:** `html`  
**WCAG SC:** 3.1.1 — Language of Page (Level A)  
**Rule:** axe-core — `html-has-lang` ([reference](https://dequeuniversity.com/rules/axe/4.12/html-has-lang?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 589 instances; 589 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<html>
```

### Description
<html> element must have a lang attribute. Detected by axe-core rule html-has-lang on 589 of 3333 scanned pages (589 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm.
2. Locate the element: html
3. Confirm the axe-core finding for rule html-has-lang against WCAG 3.1.1 Language of Page.

### Impact
Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt01.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00001036.htm
- http://www.cdc.gov/pcd/issues/2004/apr/toc.htm
- https://www.cdc.gov/pcd/issues/2009/jul/cover.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5531a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001558.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00048598.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4837a1.htm

…and more — 589 pages total ([download CSV](csv/axe-core__html-has-lang.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Add a lang attribute to <html> (e.g. lang="en").

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/html-has-lang?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm

---

## Document has a valid lang attribute (WCAG 3.1.1)

**Bug ID:** `VS-e5c53539`  
**Pattern ID:** `VS-7a0e5645`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<html>`  
**WCAG SC:** 3.1.1 — Language of Page (Level A)  
**Rule:** Siteimprove Alfa — `sia-r4` ([reference](https://alfa.siteimprove.com/rules/sia-r4))  
**Severity:** Moderate  
**Frequency:** 157 instances; 157 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 157 of 3333 scanned pages (157 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <html>
3. Confirm the Siteimprove Alfa finding for rule sia-r4 against WCAG 3.1.1 Language of Page.

### Impact
Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055332.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5021a3.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0205_fr.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5117a7.htm

…and more — 157 pages total ([download CSV](csv/alfa__sia-r4.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Add a valid lang attribute to <html>.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r4

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Form elements must have labels (WCAG 4.1.2)

**Bug ID:** `VS-4f013738`  
**Pattern ID:** `VS-fafffee0`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6345a6.htm?s_cid=mm6345a6_w  
**XPath / selector:** `#searchBox`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `label` ([reference](https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 264 instances; 162 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
```

### Description
Form elements must have labels. Detected by axe-core rule label on 162 of 3333 scanned pages (264 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6345a6.htm?s_cid=mm6345a6_w.
2. Locate the element: #searchBox
3. Confirm the axe-core finding for rule label against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6345a6.htm?s_cid=mm6345a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6142a4.htm?s_cid=mm6142a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6103a1.htm?s_cid=mm6103a1_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6410a8.htm?s_cid=mm6410a8_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6121a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6402a4.htm?s_cid=mm6402a4_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su6302a1.htm?s_cid=su6302a1_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6145a3.htm?s_cid=mm6145a3_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6026a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6309a3.htm?s_cid=mm6309a3_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6116a4.htm?s_cid=mm6116a4_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6012a1.htm?s_cid=mm6012a1_w
- http://www.cdc.gov/stophivtogether/library/hiv-treatment-works/banners/square.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6212a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6429a1.htm?s_cid=mm6429a1_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6122a4.htm?s_cid=mm6122a4_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6410md.htm?s_cid=mm6410md_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6344a5.htm?s_cid=mm6344a5_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6442a3.htm?s_cid=mm6442a3_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6419a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6143a2.htm?s_cid=mm6143a2_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6012a7.htm?s_cid=mm6012a7_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6010a2.htm?s_cid=mm6010a2_w

…and more — 162 pages total ([download CSV](csv/axe-core__label.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6345a6.htm?s_cid=mm6345a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6142a4.htm?s_cid=mm6142a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6103a1.htm?s_cid=mm6103a1_w

---

## Select element must have an accessible name (WCAG 4.1.2)

**Bug ID:** `VS-a35a9efd`  
**Pattern ID:** `VS-fab92378`  
**URL:** http://www.cdc.gov/wtc/print-materials.html  
**XPath / selector:** `.row:nth-child(1) > .col-sm-12.col-md-6.col-lg-6:nth-child(1) > .row > .col-lg-12.col-md-12.col-sm-12 > .landing-header.d-flex.align-items-center > form > select`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `select-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/select-name?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 11 instances; 3 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (15 weeks)

### HTML snippet
```html
<select id="responderSize" onchange="Toggle(this);" class="form-select ">
```

### Description
Select element must have an accessible name. Detected by axe-core rule select-name on 3 of 3333 scanned pages (11 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/wtc/print-materials.html.
2. Locate the element: .row:nth-child(1) > .col-sm-12.col-md-6.col-lg-6:nth-child(1) > .row > .col-lg-12.col-md-12.col-sm-12 > .landing-header.d-flex.align-items-center > form > select
3. Confirm the axe-core finding for rule select-name against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- http://www.cdc.gov/wtc/print-materials.html
- https://www.cdc.gov/nchs/hus/data-finder.htm?subject=Vaccination
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6339a5.htm?s_cid=mm6339a5_w

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the <select> an accessible name via a <label> or aria-label.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/select-name?application=axeAPI

### Example pages
- http://www.cdc.gov/wtc/print-materials.html
- https://www.cdc.gov/nchs/hus/data-finder.htm?subject=Vaccination
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6339a5.htm?s_cid=mm6339a5_w

---

## Buttons must have discernible text (WCAG 4.1.2)

**Bug ID:** `VS-f22ab381`  
**Pattern ID:** `VS-e7298c00`  
**URL:** http://www.cdc.gov/hiv/es/about/acerca-del-vih.html  
**XPath / selector:** `#search__icon`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `button-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/button-name?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 3 instances; 3 of 3333 pages affected
  
**History:** first seen 2026-W26, last seen 2026-W39 (11 weeks)

### HTML snippet
```html
<button id="search__icon" class="c-search__icon"></button>
```

### Description
Buttons must have discernible text. Detected by axe-core rule button-name on 3 of 3333 scanned pages (3 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/hiv/es/about/acerca-del-vih.html.
2. Locate the element: #search__icon
3. Confirm the axe-core finding for rule button-name against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- http://www.cdc.gov/hiv/es/about/acerca-del-vih.html
- http://www.cdc.gov/wtc/conditions.html
- https://www.cdc.gov/hiv/es/prevention/como-prevenir-el-vih-con-el-uso-de-condones.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the button an accessible name via its text content, aria-label, or aria-labelledby.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/button-name?application=axeAPI

### Example pages
- http://www.cdc.gov/hiv/es/about/acerca-del-vih.html
- http://www.cdc.gov/wtc/conditions.html
- https://www.cdc.gov/hiv/es/prevention/como-prevenir-el-vih-con-el-uso-de-condones.html

---

## ARIA attributes must conform to valid values (WCAG 4.1.2)

**Bug ID:** `VS-07b8ea2a`  
**Pattern ID:** `VS-af36d20c`  
**URL:** https://www.cdc.gov/niosh/idlh/8003347.html  
**XPath / selector:** `a[href$="#nav-group-2f23f"]`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `aria-valid-attr-value` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-valid-attr-value?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 3 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W29, last seen 2026-W39 (2 weeks)

### HTML snippet
```html
<a href="#nav-group-2f23f" aria-controls="#nav-group-2f23f" class="nav-minus nav-expandcollapse" data-toggle="collapse"><span class="sr-only">minus icon</span><span class="fi cdc-icon-minus" aria-hidd
```

### Description
ARIA attributes must conform to valid values. Detected by axe-core rule aria-valid-attr-value on 2 of 3333 scanned pages (3 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/niosh/idlh/8003347.html.
2. Locate the element: a[href$="#nav-group-2f23f"]
3. Confirm the axe-core finding for rule aria-valid-attr-value against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/niosh/idlh/8003347.html
- https://www.cdc.gov/nchs/nvss/vsrr/infant-mortality-dashboard.htm

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Fix the ARIA attribute value — it must reference a real id or use an allowed value.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-valid-attr-value?application=axeAPI

### Example pages
- https://www.cdc.gov/niosh/idlh/8003347.html
- https://www.cdc.gov/nchs/nvss/vsrr/infant-mortality-dashboard.htm

---

## Frames must have an accessible name (WCAG 4.1.2)

**Bug ID:** `VS-df713185`  
**Pattern ID:** `VS-3f76c7ea`  
**URL:** https://www.cdc.gov/museum/education/newsletter/2022/may/index.html  
**XPath / selector:** `iframe[allowfullscreen="allowfullscreen"]`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `frame-title` ([reference](https://dequeuniversity.com/rules/axe/4.12/frame-title?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 39 instances; 24 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<iframe src="//www.youtube-nocook..." allowfullscreen="allowfullscreen" title="">
```

### Description
Frames must have an accessible name. Detected by axe-core rule frame-title on 24 of 3333 scanned pages (39 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/museum/education/newsletter/2022/may/index.html.
2. Locate the element: iframe[allowfullscreen="allowfullscreen"]
3. Confirm the axe-core finding for rule frame-title against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/museum/education/newsletter/2022/may/index.html
- https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187
- http://www.cdc.gov/cancer-survivors/healthy-living-guides/eating-healthy.html
- https://www.cdc.gov/tuskegee
- https://www.cdc.gov/cancer/hpv/preventing-hpv-associated-cancers.html
- http://www.cdc.gov/bird-flu/video-series/raw-milk.html
- http://www.cdc.gov/hiv/es/about/acerca-del-vih.html
- https://www.cdc.gov/wtc/administrator_20200911.html
- http://www.cdc.gov/prostate-cancer/screening/get-screened.html
- https://www.cdc.gov/advanced-molecular-detection/php/training/module-3-2.html
- https://www.cdc.gov/onehealth
- https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344
- http://www.cdc.gov/gynecologic-cancer/symptoms/index.html
- https://www.cdc.gov/stop-overdose/safety/index.html
- http://www.cdc.gov/stop-overdose/es/response/que-hacer-si-cree-que-alguien-tiene-una-sobredosis.html
- https://www.cdc.gov/female-blood-disorders/about/information-for-adolescents.html
- http://www.cdc.gov/cancer/risk-factors/tobacco.html
- http://www.cdc.gov/antimicrobial-resistance/prevention/veterinarians.html
- https://www.cdc.gov/radiation-emergencies/response/get-inside.html
- http://www.cdc.gov/diabetes-prevention/programs/videos.html
- https://www.cdc.gov/howrightnow/espanol/inspiracion/index.html
- https://www.cdc.gov/advanced-molecular-detection/php/training/module-1-1.html
- http://www.cdc.gov/diabetes-prevention/lifestyle-change-program/lifestyle-change-program-details.html
- http://www.cdc.gov/stop-overdose/es/caring/datos-sobre-el-consumo-de-polisustancias.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give every <iframe> a descriptive title attribute.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/frame-title?application=axeAPI

### Example pages
- https://www.cdc.gov/museum/education/newsletter/2022/may/index.html
- https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187
- http://www.cdc.gov/cancer-survivors/healthy-living-guides/eating-healthy.html

---

## ARIA commands must have an accessible name (WCAG 4.1.2)

**Bug ID:** `VS-b297d75b`  
**Pattern ID:** `VS-5c82bd60`  
**URL:** https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html  
**XPath / selector:** `th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `aria-command-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-command-name?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 180 instances; 8 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<span role="button" class="sort-icon"><svg class="up" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 5"><path d="M0 5l5-5 5 5z"></path></svg><svg class="down" xmlns="http://www.w3.org/2000/svg" vi
```

### Description
ARIA commands must have an accessible name. Detected by axe-core rule aria-command-name on 8 of 3333 scanned pages (180 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html.
2. Locate the element: th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-c/figure-3.5.htm
- http://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-6.html
- https://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-c/figure-3-1.html
- http://www.cdc.gov/birth-defects/data-research/facts-stats/index.html
- http://www.cdc.gov/hepatitis/php/npr-2025/hep-b-reduce-deaths-api.html
- https://www.cdc.gov/hiv-data/nhbs/hiv-risk-prevention-testing-msm.html
- http://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-a/figure-1.4.htm

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the command (button/link/menuitem) an accessible name via text or aria-label.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-command-name?application=axeAPI

### Example pages
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/hepatitis-c/figure-3.5.htm
- http://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-6.html

---

## Interactive controls must not be nested (WCAG 4.1.2)

**Bug ID:** `VS-145b6403`  
**Pattern ID:** `VS-58301a87`  
**URL:** https://www.cdc.gov/tb/statistics/reports/2022/national_data.htm  
**XPath / selector:** `#acc-header-7`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `nested-interactive` ([reference](https://dequeuniversity.com/rules/axe/4.12/nested-interactive?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 17 instances; 6 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<div class="card-header h4 bg-white rounded-0 collapsed" role="tab" id="acc-header-7" href="#acc-panel-7" data-toggle="collapse" data-parent="#accordion-7" aria-controls="acc-panel-7" aria-expanded="f
```

### Description
Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 6 of 3333 scanned pages (17 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/tb/statistics/reports/2022/national_data.htm.
2. Locate the element: #acc-header-7
3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/tb/statistics/reports/2022/national_data.htm
- https://www.cdc.gov/niosh/ocas/secstatustable.html
- http://www.cdc.gov/birth-defects/data-research/facts-stats/index.html
- https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344
- https://www.cdc.gov/niosh/ocas/default.html
- https://www.cdc.gov/diabetes/burden-toolkit/state-burden-toolkit-economic-burden.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Don't nest interactive controls (e.g. a button inside a link); split them apart.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/nested-interactive?application=axeAPI

### Example pages
- https://www.cdc.gov/tb/statistics/reports/2022/national_data.htm
- https://www.cdc.gov/niosh/ocas/secstatustable.html
- http://www.cdc.gov/birth-defects/data-research/facts-stats/index.html

---

## Elements must only use permitted ARIA attributes (WCAG 4.1.2)

**Bug ID:** `VS-f63fd35f`  
**Pattern ID:** `VS-ebb1c464`  
**URL:** https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187  
**XPath / selector:** `#UNIQUE4058168dae575c1787`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `aria-prohibited-attr` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-prohibited-attr?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 2 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W28, last seen 2026-W39 (10 weeks)

### HTML snippet
```html
<div class="cdc-card-slider cdc-video-slider slick-initialized slick-slider cdc-carousel-slider" id="UNIQUE4058168dae575c1787" aria-label="Carousel">
```

### Description
Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 2 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187.
2. Locate the element: #UNIQUE4058168dae575c1787
3. Confirm the axe-core finding for rule aria-prohibited-attr against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187
- https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-prohibited-attr?application=axeAPI

### Example pages
- https://www.cdc.gov/stophivtogether/hiv-prevention/index.html?s_cid=so_togetherconsumertk0187
- https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0344

---

## Form field has accessible name (WCAG 4.1.2)

**Bug ID:** `VS-63617189`  
**Pattern ID:** `VS-a48e6078`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w  
**XPath / selector:** `<input id="searchBox" class="searchBox" name="query" maxlength="256">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r8` ([reference](https://alfa.siteimprove.com/rules/sia-r8))  
**Severity:** Moderate  
**Frequency:** 37 instances; 34 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 34 of 3333 scanned pages (37 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w.
2. Locate the element: <input id="searchBox" class="searchBox" name="query" maxlength="256">
3. Confirm the Siteimprove Alfa finding for rule sia-r8 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6148a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6120a3.htm?s_cid=mm6120a3_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6009a1.htm?s_cid=mm6009a1_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6310a1.htm?s_cid=mm6310a1_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6047a5.htm?s_cid=mm6047a5_w
- https://www.cdc.gov/nchs/hus/data-finder.htm?subject=Vaccination
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5921a3_ensp.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6143a6.htm?s_cid=mm6143a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6323md.htm?s_cid=mm6323md_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6415a9.htm?s_cid=mm6415a9_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su6201a2.htm?s_cid=su6201a2_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6130md.htm?s_cid=mm6130md_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6201a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6316a12.htm?s_cid=mm6316a12_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6129a7.htm?s_cid=mm6129a7_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6117md.htm?s_cid=mm6117md_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6133a4.htm?s_cid=mm6133a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5935a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6432a1.htm?s_cid=mm6432a1_w
- https://www.cdc.gov/mmwr/preview/ind2014_su.html
- http://www.cdc.gov/mmwr/preview/ind1998_rr.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6105a2.htm?s_cid=mm6105a2_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6110a4.htm?s_cid=mm6110a4_w

…and more — 34 pages total ([download CSV](csv/alfa__sia-r8.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Associate the form field with a label.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r8

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6148a2.htm

---

## Button has accessible name (WCAG 4.1.2)

**Bug ID:** `VS-1310c48f`  
**Pattern ID:** `VS-29f9f921`  
**URL:** https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html  
**XPath / selector:** `<span role="button" class="sort-icon">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r12` ([reference](https://alfa.siteimprove.com/rules/sia-r12))  
**Severity:** Moderate  
**Frequency:** 103 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (15 weeks)

### Description
Button has accessible name. Detected by Siteimprove Alfa rule sia-r12 on 2 of 3333 scanned pages (103 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html.
2. Locate the element: <span role="button" class="sort-icon">
3. Confirm the Siteimprove Alfa finding for rule sia-r12 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- https://www.cdc.gov/stophivtogether/library?Language=English+%28US%29&Sort=Last+Updated%3A%3Adesc&Topic=Testing

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the button an accessible name via text, aria-label, or aria-labelledby.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r12

### Example pages
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- https://www.cdc.gov/stophivtogether/library?Language=English+%28US%29&Sort=Last+Updated%3A%3Adesc&Topic=Testing

---

## Component with same name serves same purpose (WCAG 4.1.2)

**Bug ID:** `VS-fd654684`  
**Pattern ID:** `VS-a2a3dffb`  
**URL:** http://www.cdc.gov/diphtheria/php/surveillance/index.html  
**XPath / selector:** `<svg width="657.515625" height="329.86000061035156" class="linear   false false" role="img">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r90` ([reference](https://alfa.siteimprove.com/rules/sia-r90))  
**Severity:** Moderate  
**Frequency:** 2 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (15 weeks)

### Description
Component with same name serves same purpose. Detected by Siteimprove Alfa rule sia-r90 on 2 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/diphtheria/php/surveillance/index.html.
2. Locate the element: <svg width="657.515625" height="329.86000061035156" class="linear   false false" role="img">
3. Confirm the Siteimprove Alfa finding for rule sia-r90 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- http://www.cdc.gov/diphtheria/php/surveillance/index.html
- https://www.cdc.gov/diabetes/burden-toolkit/state-burden-toolkit-economic-burden.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r90

### Example pages
- http://www.cdc.gov/diphtheria/php/surveillance/index.html
- https://www.cdc.gov/diabetes/burden-toolkit/state-burden-toolkit-economic-burden.html

---

## Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3)

**Bug ID:** `VS-cc40c221`  
**Pattern ID:** `VS-be8d563e`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm  
**XPath / selector:** `a[name="content_area"] > font[color="red"]`  
**WCAG SC:** 1.4.3 — Contrast (Minimum) (Level AA)  
**Rule:** axe-core — `color-contrast` ([reference](https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 865 instances; 570 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<font color="red">Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: </font>
```

### Description
Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 570 of 3333 scanned pages (865 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm.
2. Locate the element: a[name="content_area"] > font[color="red"]
3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

### Impact
Affects Limited vision (2.4%), Without color perception (4.5%).
- **Limited vision** (2.4% of population)
- **Without color perception** (4.5% of population)

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00001036.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6142a4.htm?s_cid=mm6142a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6103a1.htm?s_cid=mm6103a1_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5531a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001558.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00048598.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4837a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00039829.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000529.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5103md.htm

…and more — 570 pages total ([download CSV](csv/axe-core__color-contrast.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase the contrast between text and its background to at least 4.5:1 (3:1 for large text). Check both light and dark modes.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm

---

## Text has sufficient color contrast (Enhanced) (WCAG 1.4.3)

**Bug ID:** `VS-3eda31e9`  
**Pattern ID:** `VS-f7e99f4b`  
**URL:** http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html  
**XPath / selector:** `text: "Related Pages"`  
**WCAG SC:** 1.4.3 — Contrast (Minimum) (Level AA)  
**Rule:** Siteimprove Alfa — `sia-r69` ([reference](https://alfa.siteimprove.com/rules/sia-r69))  
**Severity:** Moderate  
**Frequency:** 1304 instances; 244 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 244 of 3333 scanned pages (1304 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html.
2. Locate the element: text: "Related Pages"
3. Confirm the Siteimprove Alfa finding for rule sia-r69 against WCAG 1.4.3 Contrast (Minimum).

### Impact
Affects Limited vision (2.4%), Without color perception (4.5%).
- **Limited vision** (2.4% of population)
- **Without color perception** (4.5% of population)

### Affected pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/tb/stories/diagnosis.html
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html
- https://www.cdc.gov/niosh/bulletin/2024/safety-month.html
- https://www.cdc.gov/niosh/topics/opioids
- http://www.cdc.gov/diphtheria/php/surveillance/index.html
- https://www.cdc.gov/united-states-cancer-statistics/technical-notes/relative-cancer-survival.html
- https://www.cdc.gov/niosh/bulletin/2018/noise-effects.html
- http://www.cdc.gov/cancer-survivors/healthy-living-guides/eating-healthy.html
- https://www.cdc.gov/niosh/bulletin/2015/labor-day-message.html
- https://www.cdc.gov/rural-health/php/science-tips/index.html
- http://www.cdc.gov/bird-flu/spotlights/h5n1-response-12092024.html
- https://www.cdc.gov/laboratory/specimen-submission/detail.html
- http://www.cdc.gov/niosh/bulletin/2010/workplace-training.html
- http://www.cdc.gov/niosh/bulletin/2014/tts-screening.html
- https://www.cdc.gov/nbs/php/user-testimonials/tennessee-department-of-health.html

…and more — 244 pages total ([download CSV](csv/alfa__sia-r69.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase text contrast to meet WCAG AA (4.5:1, or 3:1 for large text).

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r69

### Example pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals

---

## lang attribute must have a valid value (WCAG 3.1.2)

**Bug ID:** `VS-139ce83d`  
**Pattern ID:** `VS-dd1c019f`  
**URL:** https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html  
**XPath / selector:** `.dfe-curated-link__download.has-content > .download-container > a[lang="__"][download="covercough_hcp8-5x11_khm.pdf"][aria-label="Download"]`  
**WCAG SC:** 3.1.2 — Language of Parts (Level AA)  
**Rule:** axe-core — `valid-lang` ([reference](https://dequeuniversity.com/rules/axe/4.12/valid-lang?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 2 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (10 weeks)

### HTML snippet
```html
<a lang="__" class="cdc-block-link" href="/flu-resources/media/pdfs/2024/08/covercough_hcp8-5x11_khm.pdf" aria-label="Download" download="covercough_hcp8-5x11_khm.pdf" target="_blank">
```

### Description
lang attribute must have a valid value. Detected by axe-core rule valid-lang on 2 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html.
2. Locate the element: .dfe-curated-link__download.has-content > .download-container > a[lang="__"][download="covercough_hcp8-5x11_khm.pdf"][aria-label="Download"]
3. Confirm the axe-core finding for rule valid-lang against WCAG 3.1.2 Language of Parts.

### Impact
Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html
- https://www.cdc.gov/carbon-monoxide/factsheets/co-poisoning-fact-sheet.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/valid-lang?application=axeAPI

### Example pages
- https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html
- https://www.cdc.gov/carbon-monoxide/factsheets/co-poisoning-fact-sheet.html

---

## Element with lang attribute has correct language (WCAG 3.1.2)

**Bug ID:** `VS-94e41bc4`  
**Pattern ID:** `VS-400f3a18`  
**URL:** https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html  
**XPath / selector:** `@lang="__"`  
**WCAG SC:** 3.1.2 — Language of Parts (Level AA)  
**Rule:** Siteimprove Alfa — `sia-r7` ([reference](https://alfa.siteimprove.com/rules/sia-r7))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (4 weeks)

### Description
Element with lang attribute has correct language. Detected by Siteimprove Alfa rule sia-r7 on 1 of 3333 scanned pages (1 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html.
2. Locate the element: @lang="__"
3. Confirm the Siteimprove Alfa finding for rule sia-r7 against WCAG 3.1.2 Language of Parts.

### Impact
Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-health-care-flyer.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r7

---

## Text has enhanced contrast (WCAG 1.4.6)

**Bug ID:** `VS-63e67409`  
**Pattern ID:** `VS-646b1e0b`  
**URL:** https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm  
**XPath / selector:** `text: "Emerging Infectious Diseases Journal"`  
**WCAG SC:** 1.4.6 — Contrast (Enhanced) (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r66` ([reference](https://alfa.siteimprove.com/rules/sia-r66))  
**Severity:** Moderate  
**Frequency:** 18594 instances; 619 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 619 of 3333 scanned pages (18594 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm.
2. Locate the element: text: "Emerging Infectious Diseases Journal"
3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/niosh/npg/npgd0430.html
- https://www.cdc.gov/tb/stories/diagnosis.html
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/overdose-prevention/es/site.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- http://www.cdc.gov/mmwr/volumes/72/wr/mm7223a2.htm?s_cid=mm7223a2_w
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/brfss/acbs/2008/prevalence_tables/table8a.html
- https://www.cdc.gov/mmwr/volumes/69/wr/mm6919a2.htm
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html

…and more — 619 pages total ([download CSV](csv/alfa__sia-r66.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase text contrast to meet WCAG AAA (7:1).

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r66

### Example pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html

---

## Link is distinguishable without relying on color (WCAG 1.4.8)

**Bug ID:** `VS-e55a5287`  
**Pattern ID:** `VS-fbf54eba`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">`  
**WCAG SC:** 1.4.8 — Visual Presentation (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r74` ([reference](https://alfa.siteimprove.com/rules/sia-r74))  
**Severity:** Moderate  
**Frequency:** 1937 instances; 324 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 324 of 3333 scanned pages (1937 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">
3. Confirm the Siteimprove Alfa finding for rule sia-r74 against WCAG 1.4.8 Visual Presentation.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- https://www.cdc.gov/niosh/chemicals
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html
- https://www.cdc.gov/niosh/bulletin/2024/safety-month.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- https://www.cdc.gov/niosh/topics/opioids
- https://www.cdc.gov/pcd/issues/2019/19_0021a.htm
- https://www.cdc.gov/niosh/bulletin/2018/noise-effects.html
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- https://www.cdc.gov/niosh/bulletin/2015/labor-day-message.html

…and more — 324 pages total ([download CSV](csv/alfa__sia-r74.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r74

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8)

**Bug ID:** `VS-4feb9f54`  
**Pattern ID:** `VS-2208081b`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<p>`  
**WCAG SC:** 1.4.8 — Visual Presentation (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r73` ([reference](https://alfa.siteimprove.com/rules/sia-r73))  
**Severity:** Moderate  
**Frequency:** 75785 instances; 241 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 241 of 3333 scanned pages (75785 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <p>
3. Confirm the Siteimprove Alfa finding for rule sia-r73 against WCAG 1.4.8 Visual Presentation.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- https://www.cdc.gov/pcd/issues/2019/19_0021a.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm

…and more — 241 pages total ([download CSV](csv/alfa__sia-r73.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r73

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Scrollable element is keyboard accessible (WCAG 1.4.8)

**Bug ID:** `VS-9df66f61`  
**Pattern ID:** `VS-388b5438`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html  
**XPath / selector:** `<p>`  
**WCAG SC:** 1.4.8 — Visual Presentation (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r80` ([reference](https://alfa.siteimprove.com/rules/sia-r80))  
**Severity:** Moderate  
**Frequency:** 43 instances; 41 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (14 weeks)

### Description
Scrollable element is keyboard accessible. Detected by Siteimprove Alfa rule sia-r80 on 41 of 3333 scanned pages (43 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html.
2. Locate the element: <p>
3. Confirm the Siteimprove Alfa finding for rule sia-r80 against WCAG 1.4.8 Visual Presentation.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html
- https://cdc.gov/nchs/index.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/food-safety/communication-resources/clean-refrigerator-steps.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/releases/2026/united-states-completes-who-withdrawal.html
- https://cdc.gov/immigrant-refugee-health/hcp/civil-surgeons/medical-history-physical-examination.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/hepatitis-a/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/laboratory/specimen-submission/list.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/lab-training/php/courses/microbiology-series.html
- https://cdc.gov/infection-control/hcp/mdro-management/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/outbreaks/07-26/locations.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/handhygiene/video/Evaluate-TranscriptTXT.txt
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/databriefs.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2026/los-cdc-activan-su-centro-de-operaciones-de-emergencia-para-la-respuesta-al-brote-de-gusano.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vector-borne-diseases/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mumps/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/investigate-legionella/index.html
- https://cdc.gov/hepatitis-b/hcp/perinatal-provider-overview/index.html
- https://cdc.gov/hepatitis/php/legal-and-policy-resources/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heartland-virus/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/biorisk-management/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/lab-training/php/courses/biothreat-rule-out-refer-series.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/bird-flu/video-series/exposed-h5n1.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/west-nile-virus/prevention/index.html

…and more — 41 pages total ([download CSV](csv/alfa__sia-r80.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r80

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

---

## Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5)

**Bug ID:** `VS-8e6ae019`  
**Pattern ID:** `VS-cb53cc4d`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<a href="#content_area">`  
**WCAG SC:** 2.5.5 — Target Size (Enhanced) (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r111` ([reference](https://alfa.siteimprove.com/rules/sia-r111))  
**Severity:** Moderate  
**Frequency:** 21377 instances; 728 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 728 of 3333 scanned pages (21377 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <a href="#content_area">
3. Confirm the Siteimprove Alfa finding for rule sia-r111 against WCAG 2.5.5 Target Size (Enhanced).

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/niosh/npg/npgd0430.html
- https://www.cdc.gov/tb/stories/diagnosis.html
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/overdose-prevention/es/site.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html

…and more — 728 pages total ([download CSV](csv/alfa__sia-r111.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r111

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## All page content should be contained by landmarks (WCAG criterion undetermined)

**Bug ID:** `VS-72f8dd90`  
**Pattern ID:** `VS-f18df681`  
**URL:** https://www.cdc.gov/hiv/data-research/facts-stats/index.html  
**XPath / selector:** `.cdc-site-gov-notice`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `region` ([reference](https://dequeuniversity.com/rules/axe/4.12/region?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 21897 instances; 2928 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<div class="cdc-site-gov-notice noindex noprint" aria-label="Official website of the United States government">
```

### Description
All page content should be contained by landmarks. Detected by axe-core rule region on 2928 of 3333 scanned pages (21897 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/hiv/data-research/facts-stats/index.html.
2. Locate the element: .cdc-site-gov-notice
3. Confirm the axe-core finding for rule region.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/hiv/data-research/facts-stats/index.html
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm
- https://www.cdc.gov/niosh/bulletin/2015/protejase3.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/niosh/npg/npgd0409.html
- https://www.cdc.gov/dhds/site.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/oral-health-data-systems/about_oral_health_data/synopses-of-state-oral-health-programs.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://www.cdc.gov/abcs/isolates-and-data/isolate-bank.html
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/mmwr/volumes/65/rr/rr6505a1.htm
- https://www.cdc.gov/emotional-well-being/site.html
- https://www.cdc.gov/caregiving/caring-for-yourself?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Faging%2Fpublications%2Ffeatures%2Fcaring-for-yourself.html
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/nchs/injury/ice/amsterdam1998/amsterdam1998_farr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- https://www.cdc.gov/niosh/docs/2004-110/default.html
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/niosh/bulletin/2016/tribal-partnerships.html
- https://www.cdc.gov/niosh/npg/npgd0562.html
- https://www.cdc.gov/infection-control/hcp/cauti/recommendations-for-further-research.html

…and more — 2928 pages total ([download CSV](csv/axe-core__region.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Wrap all page content in landmarks (header, nav, main, footer) so users can navigate by region.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/region?application=axeAPI

### Example pages
- https://www.cdc.gov/hiv/data-research/facts-stats/index.html
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm
- https://www.cdc.gov/niosh/bulletin/2015/protejase3.html

---

## Elements should not have tabindex greater than zero (WCAG criterion undetermined)

**Bug ID:** `VS-c19673c8`  
**Pattern ID:** `VS-7430f84c`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `a[href$="#content"]`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `tabindex` ([reference](https://dequeuniversity.com/rules/axe/4.12/tabindex?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 474 instances; 158 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (8 weeks)

### HTML snippet
```html
<a class="skippy visually-hidden-focusable" href="#content" tabindex="1">Skip to site content</a>
```

### Description
Elements should not have tabindex greater than zero. Detected by axe-core rule tabindex on 158 of 3333 scanned pages (474 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: a[href$="#content"]
3. Confirm the axe-core finding for rule tabindex.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/brfss/smart/smart_2020.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/parasites/features/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/port-health/stations/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/immigrant-refugee-health/laws-regulations/final-rule-medical-exam-revisions.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/indrr_2008.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/respiratory-viruses/es/prevention/las-mascarillas-y-la-prevencion-de-virus-respiratorios.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/rubella/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-reportan-una-reduccion-de-casi-un-24-en-las-muertes-por-sobredosis-de-drogas-en-los.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/vsus/ta.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

…and more — 158 pages total ([download CSV](csv/axe-core__tabindex.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Avoid tabindex values greater than 0; they create a confusing tab order.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/tabindex?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html

---

## Form elements should have a visible label (WCAG criterion undetermined)

**Bug ID:** `VS-c3a0cbd2`  
**Pattern ID:** `VS-33841929`  
**URL:** https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm  
**XPath / selector:** `.smallfield`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `label-title-only` ([reference](https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 155 instances; 155 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<input class="smallfield" type="text" name="email" size="15" title="Insert e-mail" value="Insert e-mail" onfocus="this.value=''">
```

### Description
Form elements should have a visible label. Detected by axe-core rule label-title-only on 155 of 3333 scanned pages (155 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm.
2. Locate the element: .smallfield
3. Confirm the axe-core finding for rule label-title-only.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- http://www.cdc.gov/pcd/issues/2007/oct/07_0147.htm
- http://www.cdc.gov/pcd/issues/2005/jan/04_0066.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0056_zht.htm
- https://www.cdc.gov/pcd/issues/2009/jan/08_0009_zht.htm
- http://www.cdc.gov/PCD/issues/2006/apr/05_0139_zht.htm
- http://www.cdc.gov/pcd/issues/2008/oct/07_0164_fr.htm
- http://www.cdc.gov/pcd/issues/2005/apr/04_0114_fr.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0240_es.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0045_es.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm
- https://www.cdc.gov/pcd/issues/2005/jul/05_0021.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0204_zht.htm
- http://www.cdc.gov/pcd/issues/2007/apr/06_0105_fr.htm
- http://www.cdc.gov/pcd/issues/2006/apr/05_0097_es.htm
- http://www.cdc.gov/pcd/issues/2011/jul/10_0149_es.htm
- http://www.cdc.gov/pcd/issues/2008/apr/07_0205_fr.htm

…and more — 155 pages total ([download CSV](csv/axe-core__label-title-only.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI

### Example pages
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm

---

## ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined)

**Bug ID:** `VS-36900a8e`  
**Pattern ID:** `VS-fa724f90`  
**URL:** http://www.cdc.gov/wtc/enews.html  
**XPath / selector:** `.sr-modal-dialog`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `aria-dialog-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-dialog-name?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 14 instances; 4 of 3333 pages affected
  
**History:** first seen 2026-W29, last seen 2026-W39 (9 weeks)

### HTML snippet
```html
<div class="sr-modal-dialog" role="dialog" tabindex="-1" style="max-width: 500px;">
```

### Description
ARIA dialog and alertdialog nodes should have an accessible name. Detected by axe-core rule aria-dialog-name on 4 of 3333 scanned pages (14 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/wtc/enews.html.
2. Locate the element: .sr-modal-dialog
3. Confirm the axe-core finding for rule aria-dialog-name.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/wtc/enews.html
- https://www.cdc.gov/nhsn/covid19/ltc-vaccination-dashboard.html
- http://www.cdc.gov/wtc/conditions.html
- http://www.cdc.gov/nhsn/covid19/ltc-vaccination-dashboard.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the dialog an accessible name (aria-label or aria-labelledby).

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-dialog-name?application=axeAPI

### Example pages
- http://www.cdc.gov/wtc/enews.html
- https://www.cdc.gov/nhsn/covid19/ltc-vaccination-dashboard.html
- http://www.cdc.gov/wtc/conditions.html

---

## Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined)

**Bug ID:** `VS-570d5313`  
**Pattern ID:** `VS-8806389c`  
**URL:** https://www.cdc.gov/niosh/bulletin/2015/protejase3.html  
**XPath / selector:** `.page-right-rail__static`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-unique` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 1319 instances; 977 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
```

### Description
Landmarks should have a unique role or role/label/title (i.e. accessible name) c. Detected by axe-core rule landmark-unique on 977 of 3333 scanned pages (1319 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/niosh/bulletin/2015/protejase3.html.
2. Locate the element: .page-right-rail__static
3. Confirm the axe-core finding for rule landmark-unique.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/niosh/bulletin/2015/protejase3.html
- https://www.cdc.gov/oral-health-data-systems/about_oral_health_data/synopses-of-state-oral-health-programs.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://www.cdc.gov/abcs/isolates-and-data/isolate-bank.html
- https://www.cdc.gov/caregiving/caring-for-yourself?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Faging%2Fpublications%2Ffeatures%2Fcaring-for-yourself.html
- https://www.cdc.gov/niosh/bulletin/2016/tribal-partnerships.html
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/healthy-youth/what-works-in-schools/sexual-health-services.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://www.cdc.gov/cfa-qualitative-assessments/php/data-research/mpox-risk-assessment
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/vector-borne-diseases/php/laboratories/submitting-VBD-bacterial-specimens.html
- https://www.cdc.gov/covid/hcp/clinical-care/outpatient-treatment.html
- https://www.cdc.gov/physical-activity/php/stairwell-prompts/index.html
- https://www.cdc.gov/strep-lab/php/pneumococcus/serotyping-using-pcr.html
- https://www.cdc.gov/flu/vaccine-safety/index.html
- http://www.cdc.gov/floods/about/index.html
- https://www.cdc.gov/tb-data/arpe-reports/2021-targeted-testing.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- https://www.cdc.gov/hepatitis/statistics/2021surveillance/introduction/technical-notes.htm
- http://www.cdc.gov/healthy-pets/rodent-control/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/poliovirus-containment/php/us-containment/index.html

…and more — 977 pages total ([download CSV](csv/axe-core__landmark-unique.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. "Primary" and "Footer" navigation) so screen-reader users can tell them apart.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI

### Example pages
- https://www.cdc.gov/niosh/bulletin/2015/protejase3.html
- https://www.cdc.gov/oral-health-data-systems/about_oral_health_data/synopses-of-state-oral-health-programs.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html

---

## Heading levels should only increase by one (WCAG criterion undetermined)

**Bug ID:** `VS-073408c1`  
**Pattern ID:** `VS-d25f622d`  
**URL:** https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm  
**XPath / selector:** `.bg-white.card-body > h5`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `heading-order` ([reference](https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 1232 instances; 880 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<h5>Altmetric:</h5>
```

### Description
Heading levels should only increase by one. Detected by axe-core rule heading-order on 880 of 3333 scanned pages (1232 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm.
2. Locate the element: .bg-white.card-body > h5
3. Confirm the axe-core finding for rule heading-order.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/niosh/npg/npgd0409.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/mmwr/volumes/65/rr/rr6505a1.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- https://www.cdc.gov/niosh/npg/npgd0562.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00001036.htm
- https://www.cdc.gov/mmwr/volumes/71/rr/rr7102a1.htm
- https://www.cdc.gov/mmwr/volumes/72/wr/mm7209a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5531a3.htm
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7025a2.htm?s_cid=mm7025a2_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- http://www.cdc.gov/mmwr/volumes/74/wr/mm7422a1.htm?s_cid=mm7422a1_w
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm

…and more — 880 pages total ([download CSV](csv/axe-core__heading-order.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI

### Example pages
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7007a6.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm

---

## Document should have one main landmark (WCAG criterion undetermined)

**Bug ID:** `VS-925b7fde`  
**Pattern ID:** `VS-d5d82446`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm  
**XPath / selector:** `html`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-one-main` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-one-main?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 799 instances; 799 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<html>
```

### Description
Document should have one main landmark. Detected by axe-core rule landmark-one-main on 799 of 3333 scanned pages (799 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm.
2. Locate the element: html
3. Confirm the axe-core finding for rule landmark-one-main.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000372.htm
- https://www.cdc.gov/pcd/issues/2011/may/10_0058.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6345a6.htm?s_cid=mm6345a6_w
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt01.html
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00001036.htm
- http://www.cdc.gov/pcd/issues/2004/apr/toc.htm
- https://www.cdc.gov/pcd/issues/2009/jul/cover.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6142a4.htm?s_cid=mm6142a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6103a1.htm?s_cid=mm6103a1_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5531a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0012_zhs.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001558.htm

…and more — 799 pages total ([download CSV](csv/axe-core__landmark-one-main.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Each page should have exactly one <main> landmark.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-one-main?application=axeAPI

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00021137.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm

---

## Page should contain a level-one heading (WCAG criterion undetermined)

**Bug ID:** `VS-0fea329d`  
**Pattern ID:** `VS-fa44f293`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `html`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `page-has-heading-one` ([reference](https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 251 instances; 251 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<html lang="en-us" class="cdc-theme-cdc cdc-root-home cdc-page-type--2024home">
```

### Description
Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 251 of 3333 scanned pages (251 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: html
3. Confirm the axe-core finding for rule page-has-heading-one.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://www.cdc.gov/emotional-well-being/site.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt01.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/polaris/php/index.html
- http://www.cdc.gov/chronic-disease
- http://www.cdc.gov/faca/index.html
- https://www.cdc.gov/phlp/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://www.cdc.gov/dhdsp/programs/stroke_registry.htm
- http://www.cdc.gov/chronicdisease/about
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://www.cdc.gov/abcs/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html

…and more — 251 pages total ([download CSV](csv/axe-core__page-has-heading-one.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://www.cdc.gov/emotional-well-being/site.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt01.html

---

## The skip-link target should exist and be focusable (WCAG criterion undetermined)

**Bug ID:** `VS-6145486d`  
**Pattern ID:** `VS-4edfe386`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `a[href$="#headerSearch"]`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `skip-link` ([reference](https://dequeuniversity.com/rules/axe/4.12/skip-link?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 172 instances; 172 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<a class="skippy visually-hidden-focusable" href="#headerSearch" tabindex="2">Skip to search</a>
```

### Description
The skip-link target should exist and be focusable. Detected by axe-core rule skip-link on 172 of 3333 scanned pages (172 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: a[href$="#headerSearch"]
3. Confirm the axe-core finding for rule skip-link.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/brfss/smart/smart_2020.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/parasites/features/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/port-health/stations/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/immigrant-refugee-health/laws-regulations/final-rule-medical-exam-revisions.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/indrr_2008.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/respiratory-viruses/es/prevention/las-mascarillas-y-la-prevencion-de-virus-respiratorios.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/rubella/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-reportan-una-reduccion-de-casi-un-24-en-las-muertes-por-sobredosis-de-drogas-en-los.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/vsus/ta.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

…and more — 172 pages total ([download CSV](csv/axe-core__skip-link.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Ensure the skip link targets a real, focusable element (its href must match an existing id).

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/skip-link?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html

---

## Contentinfo landmark should not be contained in another landmark (WCAG criterion undetermined)

**Bug ID:** `VS-7483545c`  
**Pattern ID:** `VS-424cced9`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `.cdc-footer > footer`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-contentinfo-is-top-level` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-contentinfo-is-top-level?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 158 instances; 158 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (7 weeks)

### HTML snippet
```html
<footer>
```

### Description
Contentinfo landmark should not be contained in another landmark. Detected by axe-core rule landmark-contentinfo-is-top-level on 158 of 3333 scanned pages (158 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: .cdc-footer > footer
3. Confirm the axe-core finding for rule landmark-contentinfo-is-top-level.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/brfss/smart/smart_2020.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/parasites/features/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/port-health/stations/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/immigrant-refugee-health/laws-regulations/final-rule-medical-exam-revisions.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/indrr_2008.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/respiratory-viruses/es/prevention/las-mascarillas-y-la-prevencion-de-virus-respiratorios.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/rubella/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-reportan-una-reduccion-de-casi-un-24-en-las-muertes-por-sobredosis-de-drogas-en-los.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/vsus/ta.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

…and more — 158 pages total ([download CSV](csv/axe-core__landmark-contentinfo-is-top-level.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-contentinfo-is-top-level?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html

---

## Document should not have more than one banner landmark (WCAG criterion undetermined)

**Bug ID:** `VS-7501142d`  
**Pattern ID:** `VS-054101da`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `.cdc-header`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-no-duplicate-banner` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-no-duplicate-banner?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 158 instances; 158 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (10 weeks)

### HTML snippet
```html
<header class="container cdc-header">
```

### Description
Document should not have more than one banner landmark. Detected by axe-core rule landmark-no-duplicate-banner on 158 of 3333 scanned pages (158 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: .cdc-header
3. Confirm the axe-core finding for rule landmark-no-duplicate-banner.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/brfss/smart/smart_2020.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/parasites/features/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/port-health/stations/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/immigrant-refugee-health/laws-regulations/final-rule-medical-exam-revisions.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/indrr_2008.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/respiratory-viruses/es/prevention/las-mascarillas-y-la-prevencion-de-virus-respiratorios.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/rubella/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-reportan-una-reduccion-de-casi-un-24-en-las-muertes-por-sobredosis-de-drogas-en-los.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/vsus/ta.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

…and more — 158 pages total ([download CSV](csv/axe-core__landmark-no-duplicate-banner.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use only one banner landmark (<header> at the top level) per page.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-no-duplicate-banner?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html

---

## Document should not have more than one contentinfo landmark (WCAG criterion undetermined)

**Bug ID:** `VS-85327895`  
**Pattern ID:** `VS-b465dfd7`  
**URL:** https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html  
**XPath / selector:** `.cdc-footer`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-no-duplicate-contentinfo` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-no-duplicate-contentinfo?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 158 instances; 158 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (7 weeks)

### HTML snippet
```html
<footer class="container cdc-footer noindex" role="contentinfo">
```

### Description
Document should not have more than one contentinfo landmark. Detected by axe-core rule landmark-no-duplicate-contentinfo on 158 of 3333 scanned pages (158 instances).

### Steps to reproduce
1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html.
2. Locate the element: .cdc-footer
3. Confirm the axe-core finding for rule landmark-no-duplicate-contentinfo.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nccdphp/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccines/basics/immunity-types.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/norovirus/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/obesity/php/about/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/safe-labs/php/resources-tools/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/preview/ind1991_rr.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/clean-hands/data-research/facts-stats/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/es/ciclosporosis.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/brfss/smart/smart_2020.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/parasites/features/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/port-health/stations/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/immigrant-refugee-health/laws-regulations/final-rule-medical-exam-revisions.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/mmwr/indrr_2008.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/respiratory-viruses/es/prevention/las-mascarillas-y-la-prevencion-de-virus-respiratorios.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/rubella/php/laboratories/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-reportan-una-reduccion-de-casi-un-24-en-las-muertes-por-sobredosis-de-drogas-en-los.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/nchs/products/vsus/ta.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html

…and more — 158 pages total ([download CSV](csv/axe-core__landmark-no-duplicate-contentinfo.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use only one contentinfo landmark (<footer> at the top level) per page.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-no-duplicate-contentinfo?application=axeAPI

### Example pages
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/vaccine-safety/vaccines/flu.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/covid/vaccines/how-they-work.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/heart-disease/php/healthy-eating-kit/index.html

---

## scope attribute should be used correctly (WCAG criterion undetermined)

**Bug ID:** `VS-02e5d273`  
**Pattern ID:** `VS-0ba8ce9d`  
**URL:** https://www.cdc.gov/pcd/issues/2019/19_0043.htm  
**XPath / selector:** `tr:nth-child(2) > td[scope="row"][align="left"][rowspan="1"]`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `scope-attr-valid` ([reference](https://dequeuniversity.com/rules/axe/4.12/scope-attr-valid?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 160 instances; 12 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<td colspan="1" rowspan="1" scope="row" align="left" valign="middle">Adults who have an overweight classification</td>
```

### Description
scope attribute should be used correctly. Detected by axe-core rule scope-attr-valid on 12 of 3333 scanned pages (160 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/pcd/issues/2019/19_0043.htm.
2. Locate the element: tr:nth-child(2) > td[scope="row"][align="left"][rowspan="1"]
3. Confirm the axe-core finding for rule scope-attr-valid.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/pcd/issues/2019/19_0043.htm
- https://www.cdc.gov/vaccines/acip/recs/grade/influenza-older-adults-etr.html
- https://www.cdc.gov/acip/evidence-to-recommendations/CYD-TDV-dengue-vaccine-etr.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-g.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week03.htm
- http://www.cdc.gov/fluview/surveillance/2024-week-41.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/week12.htm
- http://www.cdc.gov/asthma/nhis/2017/table6-2.htm
- https://www.cdc.gov/mmwr/volumes/69/rr/rr6904a1.htm?s_cid=rr6904a1_w
- https://www.cdc.gov/pcd/issues/2018/17_0465.htm
- https://www.cdc.gov/pcd/issues/2017/17_0002.htm
- http://www.cdc.gov/flu/hcp/antivirals/summary-clinicians.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/scope-attr-valid?application=axeAPI

### Example pages
- https://www.cdc.gov/pcd/issues/2019/19_0043.htm
- https://www.cdc.gov/vaccines/acip/recs/grade/influenza-older-adults-etr.html
- https://www.cdc.gov/acip/evidence-to-recommendations/CYD-TDV-dengue-vaccine-etr.html

---

## ARIA role should be appropriate for the element (WCAG criterion undetermined)

**Bug ID:** `VS-8ad5194e`  
**Pattern ID:** `VS-4fac2f41`  
**URL:** https://www.cdc.gov/niosh/docs/2004-110/default.html  
**XPath / selector:** `img[role="presentation"]`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `aria-allowed-role` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-allowed-role?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 149 instances; 144 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<img src="/niosh/docs/2004-110/images/2004-110a.jpg" alt="Preventing Lung Disease in Workers: Who Use or Make Flavorings" role="presentation">
```

### Description
ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 144 of 3333 scanned pages (149 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/niosh/docs/2004-110/default.html.
2. Locate the element: img[role="presentation"]
3. Confirm the axe-core finding for rule aria-allowed-role.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/niosh/docs/2004-110/default.html
- https://www.cdc.gov/spanish/NIOSH/docs/wp-solutions/2010-150_sp
- https://www.cdc.gov/niosh/publications/numbered/84-117.html
- http://www.cdc.gov/niosh/publications/numbered/2024-106.html
- http://www.cdc.gov/spanish/niosh/docs/2012-122_sp
- https://www.cdc.gov/niosh/docs/2005-140
- https://www.cdc.gov/niosh/publications/numbered/2011-139.html
- http://www.cdc.gov/niosh/publications/numbered/2015-231.html
- http://www.cdc.gov/niosh/docs/2012-146
- http://www.cdc.gov/niosh/publications/numbered/82-107.html
- https://www.cdc.gov/niosh/publications/numbered/2011-144.html
- https://www.cdc.gov/niosh/publications/numbered/2012-140.html
- http://www.cdc.gov/niosh/publications/es/numbered/2005-137sp.html
- https://www.cdc.gov/act-early/resources/home-visiting-programs-primer.html
- https://www.cdc.gov/niosh/publications/numbered/2002-107.html
- http://www.cdc.gov/niosh/docs/2023-114
- https://www.cdc.gov/niosh/docs/2016-107
- http://www.cdc.gov/spanish/niosh/docs/2007-133_sp
- http://www.cdc.gov/niosh/docs/2013-115
- https://www.cdc.gov/spanish/niosh/docs/2010-137_sp
- http://www.cdc.gov/niosh/docs/2014-128
- https://www.cdc.gov/niosh/publications/numbered/99-160.html
- http://www.cdc.gov/niosh/publications/es/numbered/2010-119sp.html
- https://www.cdc.gov/niosh/publications/numbered/2001-119.html
- http://www.cdc.gov/niosh/publications/numbered/2013-134.html

…and more — 144 pages total ([download CSV](csv/axe-core__aria-allowed-role.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Remove or change the ARIA role — it isn't allowed on this element type.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-allowed-role?application=axeAPI

### Example pages
- https://www.cdc.gov/niosh/docs/2004-110/default.html
- https://www.cdc.gov/spanish/NIOSH/docs/wp-solutions/2010-150_sp
- https://www.cdc.gov/niosh/publications/numbered/84-117.html

---

## Table header text should not be empty (WCAG criterion undetermined)

**Bug ID:** `VS-f37fd61a`  
**Pattern ID:** `VS-d69fc059`  
**URL:** https://www.cdc.gov/wastewater/about/wval.html  
**XPath / selector:** `th:nth-child(1)`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `empty-table-header` ([reference](https://dequeuniversity.com/rules/axe/4.12/empty-table-header?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 179 instances; 61 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<th scope="col"></th>
```

### Description
Table header text should not be empty. Detected by axe-core rule empty-table-header on 61 of 3333 scanned pages (179 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/wastewater/about/wval.html.
2. Locate the element: th:nth-child(1)
3. Confirm the axe-core finding for rule empty-table-header.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/wastewater/about/wval.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6026a4.htm
- http://www.cdc.gov/asthma/nhis/2011/table6-2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- https://www.cdc.gov/pcd/issues/2005/jul/05_0021.htm
- https://www.cdc.gov/fluview/surveillance/2024-week-45.html
- https://www.cdc.gov/niosh/nmam/cas.html
- https://www.cdc.gov/hepatitis-surveillance-2022/appendix/table-5-2.html
- http://www.cdc.gov/niosh/nmam/method-cas7.html
- https://www.cdc.gov/pcd/issues/2015/14_0540.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5824a2.htm
- https://www.cdc.gov/flu/weekly/weeklyarchives2025-2026/data/iliage47.html
- http://www.cdc.gov/niosh/idlh/71432.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6107md.htm?s_cid=mm6107md_w
- https://www.cdc.gov/flu/weekly/weeklyarchives2024-2025/data/iliage15.html
- http://www.cdc.gov/nchs/data/hestat/sleep04-06/sleep04-06.htm
- https://www.cdc.gov/asthma/asthma_stats/asthma-deaths_2001-2021.html
- https://www.cdc.gov/pcd/issues/2016/15_0471.htm
- https://www.cdc.gov/ohhabs/data/summary-report-united-states-2019.html
- http://www.cdc.gov/acip/grade/pneumo-immuno-child.html
- https://www.cdc.gov/pcd/issues/2011/jan/10_0246a.htm
- https://www.cdc.gov/pcd/issues/2012/12_0071.htm
- https://www.cdc.gov/pcd/issues/2009/jul/08_0122_es.htm
- http://www.cdc.gov/pcd/issues/2004/oct/04_0028.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6130md.htm?s_cid=mm6130md_w

…and more — 61 pages total ([download CSV](csv/axe-core__empty-table-header.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/empty-table-header?application=axeAPI

### Example pages
- https://www.cdc.gov/wastewater/about/wval.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6026a4.htm
- http://www.cdc.gov/asthma/nhis/2011/table6-2.htm

---

## Headings should not be empty (WCAG criterion undetermined)

**Bug ID:** `VS-856366fb`  
**Pattern ID:** `VS-0066c67d`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm  
**XPath / selector:** `h3:nth-child(13)`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `empty-heading` ([reference](https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 45 instances; 41 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<h3></h3>
```

### Description
Headings should not be empty. Detected by axe-core rule empty-heading on 41 of 3333 scanned pages (45 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm.
2. Locate the element: h3:nth-child(13)
3. Confirm the axe-core finding for rule empty-heading.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5125a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5113a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5437a9.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5440a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5638a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5408a2.htm
- http://www.cdc.gov/nchs/nvss/vsrr/mortality-technical-notes.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5650a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5150a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5443a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5412a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5141a4.htm
- http://www.cdc.gov/nchs/products/index.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5420a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5114a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5402a7.htm
- https://www.cdc.gov/wtc/newsYouthCohortUpdate_20241001.html
- https://www.cdc.gov/nchs/nsfg/nsfg_2017_2019_puf.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5407a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5246a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5311a5.htm

…and more — 41 pages total ([download CSV](csv/axe-core__empty-heading.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Remove empty headings or give them text. Don't use heading tags for spacing.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5312a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5450a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm

---

## Alternative text of images should not be repeated as text (WCAG criterion undetermined)

**Bug ID:** `VS-f51c7885`  
**Pattern ID:** `VS-f528778d`  
**URL:** http://www.cdc.gov/spanish/index.html  
**XPath / selector:** `.menu-container > .navbar.navbar-expand-lg > .container > .cdc-logo.navbar-brand[href$="spanish/"] > .cdc-logo--img`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `image-redundant-alt` ([reference](https://dequeuniversity.com/rules/axe/4.12/image-redundant-alt?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 14 instances; 3 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (15 weeks)

### HTML snippet
```html
<img src="/TemplatePackage/5.0/img/logo/logo-notext.svg" alt="Centros para el Control y la Prevención de Enfermedades" class="cdc-logo--img">
```

### Description
Alternative text of images should not be repeated as text. Detected by axe-core rule image-redundant-alt on 3 of 3333 scanned pages (14 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/spanish/index.html.
2. Locate the element: .menu-container > .navbar.navbar-expand-lg > .container > .cdc-logo.navbar-brand[href$="spanish/"] > .cdc-logo--img
3. Confirm the axe-core finding for rule image-redundant-alt.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/spanish/index.html
- https://www.cdc.gov/injury/wisqars/nonfatal_help/index.html
- http://www.cdc.gov/injury/wisqars/ecode_matrix.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/image-redundant-alt?application=axeAPI

### Example pages
- http://www.cdc.gov/spanish/index.html
- https://www.cdc.gov/injury/wisqars/nonfatal_help/index.html
- http://www.cdc.gov/injury/wisqars/ecode_matrix.html

---

## Tables should not have the same summary and caption (WCAG criterion undetermined)

**Bug ID:** `VS-eb94083e`  
**Pattern ID:** `VS-234b2c77`  
**URL:** https://www.cdc.gov/brfss/acbs/2017/multiple_year/acbs_prevalence_15-17_table6.html  
**XPath / selector:** `table`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `table-duplicate-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/table-duplicate-name?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 2 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (9 weeks)

### HTML snippet
```html
<table class="prevaltb" border="1" summary="Table 6: BRFSS Asthma Call-back Survey 2015-2017">
```

### Description
Tables should not have the same summary and caption. Detected by axe-core rule table-duplicate-name on 2 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/brfss/acbs/2017/multiple_year/acbs_prevalence_15-17_table6.html.
2. Locate the element: table
3. Confirm the axe-core finding for rule table-duplicate-name.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/brfss/acbs/2017/multiple_year/acbs_prevalence_15-17_table6.html
- http://www.cdc.gov/flu/hcp/antivirals/summary-clinicians.html

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/table-duplicate-name?application=axeAPI

### Example pages
- https://www.cdc.gov/brfss/acbs/2017/multiple_year/acbs_prevalence_15-17_table6.html
- http://www.cdc.gov/flu/hcp/antivirals/summary-clinicians.html

---

## Scrolling content can be accessed by keyboard (WCAG criterion undetermined)

**Bug ID:** `VS-e86b93e4`  
**Pattern ID:** `VS-c18be945`  
**URL:** http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html  
**XPath / selector:** `text: "Skip directly to search"`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r57` ([reference](https://alfa.siteimprove.com/rules/sia-r57))  
**Severity:** Moderate  
**Frequency:** 7470 instances; 528 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 528 of 3333 scanned pages (7470 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html.
2. Locate the element: text: "Skip directly to search"
3. Confirm the Siteimprove Alfa finding for rule sia-r57.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/niosh/npg/npgd0430.html
- https://www.cdc.gov/tb/stories/diagnosis.html
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- https://www.cdc.gov/overdose-prevention/es/site.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- http://www.cdc.gov/mmwr/volumes/72/wr/mm7223a2.htm?s_cid=mm7223a2_w
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/brfss/acbs/2008/prevalence_tables/table8a.html
- https://www.cdc.gov/mmwr/volumes/69/wr/mm6919a2.htm
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html
- https://www.cdc.gov/niosh/bulletin/2024/safety-month.html
- http://www.cdc.gov/healthy-youth/hecat/2021-edition.html
- https://www.cdc.gov/niosh/topics/opioids
- http://www.cdc.gov/diphtheria/php/surveillance/index.html
- https://www.cdc.gov/pcd/issues/2019/19_0021a.htm

…and more — 528 pages total ([download CSV](csv/alfa__sia-r57.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r57

### Example pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals

---

## aria attribute is permitted for element role (WCAG criterion undetermined)

**Bug ID:** `VS-c4273120`  
**Pattern ID:** `VS-e05344b9`  
**URL:** http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html  
**XPath / selector:** `@aria-label="Official website of the United States government"`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r18` ([reference](https://alfa.siteimprove.com/rules/sia-r18))  
**Severity:** Moderate  
**Frequency:** 448 instances; 365 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 365 of 3333 scanned pages (448 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html.
2. Locate the element: @aria-label="Official website of the United States government"
3. Confirm the Siteimprove Alfa finding for rule sia-r18.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals
- https://www.cdc.gov/maternal-infant-health/infant-mortality/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- https://www.cdc.gov/tb/stories/diagnosis.html
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- https://www.cdc.gov/investigate-legionella/php/public-health-strategy/index.html
- https://www.cdc.gov/environmental-exposure-report/php/about-the-data/laboratory-analysis.html
- https://www.cdc.gov/overdose-prevention/es/site.html
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/std-ips/php/glossary/appendix-k.html
- https://www.cdc.gov/abcs/isolates-and-data/available-isolates.html
- https://www.cdc.gov/nchs/pressroom/releases/20240425.html
- https://www.cdc.gov/niosh/bulletin/2024/safety-month.html
- http://www.cdc.gov/healthy-youth/hecat/2021-edition.html
- https://www.cdc.gov/niosh/topics/opioids
- http://www.cdc.gov/diphtheria/php/surveillance/index.html
- https://www.cdc.gov/united-states-cancer-statistics/technical-notes/relative-cancer-survival.html
- https://www.cdc.gov/niosh/bulletin/2018/noise-effects.html
- http://www.cdc.gov/cancer-survivors/healthy-living-guides/eating-healthy.html
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html
- https://www.cdc.gov/niosh/bulletin/2015/labor-day-message.html
- https://www.cdc.gov/rural-health/php/science-tips/index.html

…and more — 365 pages total ([download CSV](csv/alfa__sia-r18.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Only use ARIA states/properties that are allowed on this element/role.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r18

### Example pages
- http://www.cdc.gov/niosh/bulletin/2026/ototoxicants.html
- https://www.cdc.gov/niosh/topics/opioids/default.html
- https://www.cdc.gov/niosh/chemicals

---

## Headings are structured hierarchically (WCAG criterion undetermined)

**Bug ID:** `VS-3edae564`  
**Pattern ID:** `VS-f054f4a4`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `<h3>`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r53` ([reference](https://alfa.siteimprove.com/rules/sia-r53))  
**Severity:** Moderate  
**Frequency:** 349 instances; 242 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 242 of 3333 scanned pages (349 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: <h3>
3. Confirm the Siteimprove Alfa finding for rule sia-r53.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- https://www.cdc.gov/niosh/npg/npgd0430.html
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- http://www.cdc.gov/mmwr/volumes/72/wr/mm7223a2.htm?s_cid=mm7223a2_w
- https://www.cdc.gov/mmwr/volumes/69/wr/mm6919a2.htm
- http://www.cdc.gov/niosh/npg/npgd0556.html
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- https://www.cdc.gov/niosh/npg/npgd0602.html
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- https://www.cdc.gov/mmwr/volumes/71/wr/mm7126a4.htm?s_cid=mm7126a4_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm

…and more — 242 pages total ([download CSV](csv/alfa__sia-r53.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use headings in a logical, non-skipping order.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r53

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## No obsolete or deprecated elements are used (WCAG criterion undetermined)

**Bug ID:** `VS-0a106bca`  
**Pattern ID:** `VS-3d033717`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm  
**XPath / selector:** `{"type":"document","children":[{"type":"element","children":[{"type":"element","`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r70` ([reference](https://alfa.siteimprove.com/rules/sia-r70))  
**Severity:** Moderate  
**Frequency:** 190 instances; 190 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 190 of 3333 scanned pages (190 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm.
2. Locate the element: {"type":"document","children":[{"type":"element","children":[{"type":"element","
3. Confirm the Siteimprove Alfa finding for rule sia-r70.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5644a2.htm
- https://www.cdc.gov/pcd/issues/2009/apr/08_0039_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5003a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5725a6.htm
- http://www.cdc.gov/pcd/issues/2009/jan/07_0252_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- https://www.cdc.gov/pcd/issues/2008/apr/06_0147.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001891.htm
- http://www.cdc.gov/PCD/issues/2011/may/10_0087_es.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00053311.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5023a5.htm
- http://www.cdc.gov/PCD/issues/2008/apr/07_0196_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5850a1.htm
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/pcd/issues/2008/jul/07_0137_es.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055332.htm

…and more — 190 pages total ([download CSV](csv/alfa__sia-r70.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4832a1.htm
- https://www.cdc.gov/pcd/issues/2007/oct/07_0073.htm
- https://www.cdc.gov/pcd/issues/2006/oct/06_0026_fr.htm

---

## Form field label is visible (WCAG criterion undetermined)

**Bug ID:** `VS-65349d74`  
**Pattern ID:** `VS-7118fead`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w  
**XPath / selector:** `{"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r61` ([reference](https://alfa.siteimprove.com/rules/sia-r61))  
**Severity:** Moderate  
**Frequency:** 99 instances; 99 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 99 of 3333 scanned pages (99 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w.
2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
3. Confirm the Siteimprove Alfa finding for rule sia-r61.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- http://www.cdc.gov/antibiotic-use/es/site.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a9.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/high-blood-pressure/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/es/releases/2025/2025-los-cdc-lanzan-una-nueva-campana-para-abordar-el-consumo-de-sustancias-y-la-salud-mental-en-los.html
- https://cdc.gov/nchs/index.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6148a2.htm
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/food-safety/communication-resources/clean-refrigerator-steps.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6120a3.htm?s_cid=mm6120a3_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6009a1.htm?s_cid=mm6009a1_w
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/media/releases/2026/united-states-completes-who-withdrawal.html
- https://cdc.gov/immigrant-refugee-health/hcp/civil-surgeons/medical-history-physical-examination.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/hepatitis-a/about/index.html
- http://www.cdc.gov/skin-cancer/es/site.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/laboratory/specimen-submission/list.html
- https://www.cdc.gov/partners/site.html
- http://www.cdc.gov/pneumonia/site.html
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6310a1.htm?s_cid=mm6310a1_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6047a5.htm?s_cid=mm6047a5_w
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/lab-training/php/courses/microbiology-series.html
- https://cdc.gov/infection-control/hcp/mdro-management/index.html
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/cyclosporiasis/outbreaks/07-26/locations.html
- https://www.cdc.gov/genomics-and-health/site.html
- http://www.cdc.gov/act-early/index.html

…and more — 99 pages total ([download CSV](csv/alfa__sia-r61.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r61

### Example pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/diphtheria/about/index.html
- http://www.cdc.gov/antibiotic-use/es/site.html

---

## Presentational attribute (use CSS) (WCAG criterion undetermined)

**Bug ID:** `VS-cc57d46d`  
**Pattern ID:** `VS-04a9d28c`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm  
**XPath / selector:** `body`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `presentational-attr`  
**Severity:** Moderate  
**Frequency:** 9744 instances; 80 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<body bgcolor="#ffffff" leftmargin="0" topmargin="0" marginheight="0" marginwidth="0" class=" dmat-load-complete">
<!-- report header -->
<!--webbot bot="Include" U-Include="../../headers_footers/repo
```

### Description
Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 80 of 3333 scanned pages (9744 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm.
2. Locate the element: body
3. Confirm the deprecated-html finding for rule presentational-attr.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- https://www.cdc.gov/mmwr/volumes/69/wr/mm6919a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00037995.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5107a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5845a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5638a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5021a3.htm
- https://www.cdc.gov/mmwr/volumes/72/wr/mm7211a1.htm?s_cid=mm7211a1_w
- http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000398.htm
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7017e2.htm?s_cid=mm7017e2_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001661.htm
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6606a2.htm?s_cid=mm6606a2_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5112md.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001415.htm
- https://www.cdc.gov/niosh/idlh/7783417.html
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5351a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a1.htm
- https://www.cdc.gov/pcd/issues/2019/18_0308.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00017583.htm

…and more — 80 pages total ([download CSV](csv/deprecated-html__presentational-attr.csv)).

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- http://www.cdc.gov/mmwr/volumes/67/wr/mm6715a5.htm

---

## Obsolete <font> element (use CSS) (WCAG criterion undetermined)

**Bug ID:** `VS-896619b1`  
**Pattern ID:** `VS-91d2294a`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm  
**XPath / selector:** `font`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `font-element`  
**Severity:** Moderate  
**Frequency:** 399 instances; 57 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<font size="3" face="Arial, Helvetica, Verdana" color="#FFFFFF"><i><b>Weekly</b></i></font>
```

### Description
Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 57 of 3333 scanned pages (399 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm.
2. Locate the element: font
3. Confirm the deprecated-html finding for rule font-element.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00037995.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5107a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5845a2.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5638a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5021a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6012a7.htm?s_cid=mm6012a7_w
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000398.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6038a6.htm?s_cid=mm6038a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001661.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6120a3.htm?s_cid=mm6120a3_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6104a7.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5112md.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001415.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5351a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00017583.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5017a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4921a2.htm

…and more — 57 pages total ([download CSV](csv/deprecated-html__font-element.csv)).

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6040a6.htm?s_cid=mm6040a6_w
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm

---

## Table header has scope (WCAG criterion undetermined)

**Bug ID:** `VS-5f267e48`  
**Pattern ID:** `VS-2cd767ca`  
**URL:** http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html  
**XPath / selector:** `<h3 class="cdc-callout__heading">`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r78` ([reference](https://alfa.siteimprove.com/rules/sia-r78))  
**Severity:** Moderate  
**Frequency:** 52 instances; 48 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 48 of 3333 scanned pages (52 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html.
2. Locate the element: <h3 class="cdc-callout__heading">
3. Confirm the Siteimprove Alfa finding for rule sia-r78.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6603a4.htm?s_cid=mm6603a4_w
- https://www.cdc.gov/partners/site.html
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7033a7.htm?s_cid=mm7033a7_w
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6650a4.htm?s_cid=mm6650a4_w
- http://www.cdc.gov/nchs/products/index.htm
- https://www.cdc.gov/genomics-and-health/site.html
- https://www.cdc.gov/training-publichealth101/site.html
- https://www.cdc.gov/cfa-modeling-and-forecasting/site.html
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6604a1.htm?s_cid=mm6604a1_w
- https://www.cdc.gov/mmwr/volumes/70/wr/mm7037a5.htm?s_cid=mm7037a5_w
- https://www.cdc.gov/nchs/nsfg/nsfg_2017_2019_puf.htm
- https://www.cdc.gov/laboratory/specimen-submission/detail.html?CDCTestCode=CDC-10611
- https://www.cdc.gov/media/site.html
- https://www.cdc.gov/pcd/issues/2013/12_0131.htm
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6638a6.htm?s_cid=mm6638a6_w
- https://www.cdc.gov/pcd/issues/2013/12_0271.htm
- https://www.cdc.gov/mmwr/volumes/65/wr/mm6523a2.htm?s_cid=mm6523a2_w
- http://www.cdc.gov/pcd/issues/2005/apr/04_0115.htm
- https://www.cdc.gov/laboratory/specimen-submission/detail.html?CDCTestCode=CDC-10620
- http://www.cdc.gov/orr/site.html
- https://www.cdc.gov/pcd/issues/2012/12_0042.htm
- https://www.cdc.gov/lightning/site.html

…and more — 48 pages total ([download CSV](csv/alfa__sia-r78.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r78

### Example pages
- http://www.cdc.gov/global-hiv-tb/php/success-stories/kenya-hiv-care.html
- http://www.cdc.gov/antibiotic-use/es/site.html
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html

---

## Obsolete <big> element (use CSS) (WCAG criterion undetermined)

**Bug ID:** `VS-30512ee1`  
**Pattern ID:** `VS-7845739d`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm  
**XPath / selector:** `big`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `big-element`  
**Severity:** Moderate  
**Frequency:** 49 instances; 41 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<big><strong>Disclaimer</strong></big>
```

### Description
Obsolete <big> element (use CSS). Detected by deprecated-html rule big-element on 41 of 3333 scanned pages (49 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm.
2. Locate the element: big
3. Confirm the deprecated-html finding for rule big-element.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052002.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00037995.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5107a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000459.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5638a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5021a3.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000398.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001661.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5112md.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001415.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5351a5.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5618a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00017583.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5017a1.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4921a2.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00000989.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4837md.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001895.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00032760.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5015a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5311a5.htm

…and more — 41 pages total ([download CSV](csv/deprecated-html__big-element.csv)).

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5324a4.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5507a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00045576.htm

---

## Duplicate role landmark is labeled (WCAG criterion undetermined)

**Bug ID:** `VS-b35234ee`  
**Pattern ID:** `VS-f2542d87`  
**URL:** https://www.cdc.gov/mmwr/preview/mmwrhtml/00055690.htm  
**XPath / selector:** `<pre>`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r79` ([reference](https://alfa.siteimprove.com/rules/sia-r79))  
**Severity:** Moderate  
**Frequency:** 36 instances; 15 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Duplicate role landmark is labeled. Detected by Siteimprove Alfa rule sia-r79 on 15 of 3333 scanned pages (36 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00055690.htm.
2. Locate the element: <pre>
3. Confirm the Siteimprove Alfa finding for rule sia-r79.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055690.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00021959.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4827a3.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055965.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00052572.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00047345.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00051349.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00025893.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00023199.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/00047306.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00053078.htm
- https://www.cdc.gov/mmwR/preview/mmwrhtml/00047135.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00047346.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00056803.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055703.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r79

### Example pages
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00055690.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00021959.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4827a3.htm

---

## Obsolete <center> element (use CSS) (WCAG criterion undetermined)

**Bug ID:** `VS-60d8c561`  
**Pattern ID:** `VS-20060f39`  
**URL:** http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm  
**XPath / selector:** `center`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `center-element`  
**Severity:** Moderate  
**Frequency:** 30 instances; 15 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### HTML snippet
```html
<center>
  <table border="0" width="140" cellspacing="0" cellpadding="0">
    
    <tbody><tr>
      <td width="140" bgcolor="#8A9683"><img border="0" src="www.cdc.gov/navimages/spacer.gif" width="140
```

### Description
Obsolete <center> element (use CSS). Detected by deprecated-html rule center-element on 15 of 3333 scanned pages (30 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm.
2. Locate the element: center
3. Confirm the deprecated-html finding for rule center-element.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm
- https://www.cdc.gov/pcd/issues/2007/oct/06_0152.htm
- http://www.cdc.gov/pcd/issues/2007/oct/07_0080_zhs.htm
- http://www.cdc.gov/PCD/issues/2010/may/09_0170a_es.htm
- https://www.cdc.gov/pcd/issues/2005/apr/04_0132_fr.htm
- http://www.cdc.gov/pcd/issues/2007/oct/06_0150_zht.htm
- http://www.cdc.gov/pcd/issues/2006/jan/05_0077.htm
- http://www.cdc.gov/pcd/issues/2011/nov/10_0083.htm
- http://www.cdc.gov/pcd/issues/2006/jul/05_0181_zht.htm
- http://www.cdc.gov/pcd/issues/2011/nov/11_0255.htm
- http://www.cdc.gov/pcd/issues/2011/may/10_0070_es.htm
- https://www.cdc.gov/pcd/issues/2005/apr/05_0014.htm
- https://www.cdc.gov/pcd/issues/2007/jan/06_0050_zht.htm
- http://www.cdc.gov/pcd/issues/2005/nov/05_0070_es.htm
- http://www.cdc.gov/pcd/issues/2010/mar/08_0248.htm

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.

### Example pages
- http://www.cdc.gov/pcd/issues/2009/jan/08_0081.htm
- https://www.cdc.gov/pcd/issues/2007/oct/06_0152.htm
- http://www.cdc.gov/pcd/issues/2007/oct/07_0080_zhs.htm

---

## Input purpose can be determined (WCAG criterion undetermined)

**Bug ID:** `VS-31eeff99`  
**Pattern ID:** `VS-3fb891c5`  
**URL:** https://www.cdc.gov/pcd/issues/2013/12_0131.htm  
**XPath / selector:** `<fieldset>`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r60` ([reference](https://alfa.siteimprove.com/rules/sia-r60))  
**Severity:** Moderate  
**Frequency:** 10 instances; 10 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Input purpose can be determined. Detected by Siteimprove Alfa rule sia-r60 on 10 of 3333 scanned pages (10 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/pcd/issues/2013/12_0131.htm.
2. Locate the element: <fieldset>
3. Confirm the Siteimprove Alfa finding for rule sia-r60.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/pcd/issues/2013/12_0131.htm
- https://www.cdc.gov/pcd/issues/2013/12_0271.htm
- https://www.cdc.gov/pcd/issues/2012/12_0042.htm
- https://www.cdc.gov/mmwr/preview/ind2014_su.html
- http://www.cdc.gov/mmwr/preview/ind1998_rr.html
- https://www.cdc.gov/pcd/issues/2013/13_0196.htm
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a9.htm?s_cid=mm6019a9_w
- http://www.cdc.gov/mmwr/preview/index88.html
- https://www.cdc.gov/pcd/issues/2013/12_0288_es.htm
- https://www.cdc.gov/pcd/issues/2013/13_0064_es.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r60

### Example pages
- https://www.cdc.gov/pcd/issues/2013/12_0131.htm
- https://www.cdc.gov/pcd/issues/2013/12_0271.htm
- https://www.cdc.gov/pcd/issues/2012/12_0042.htm

---

## Tables are used for tabular data, not layout (WCAG criterion undetermined)

**Bug ID:** `VS-bc400ea8`  
**Pattern ID:** `VS-3d3b2245`  
**URL:** http://www.cdc.gov/salmonella/php/data-research/repjjp01.html  
**XPath / selector:** `<div role="region" tabindex="0" class="map-container visualization-container bottom map us outline-none position-relative">`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r40` ([reference](https://alfa.siteimprove.com/rules/sia-r40))  
**Severity:** Moderate  
**Frequency:** 8 instances; 5 of 3333 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W39 (16 weeks)

### Description
Tables are used for tabular data, not layout. Detected by Siteimprove Alfa rule sia-r40 on 5 of 3333 scanned pages (8 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/salmonella/php/data-research/repjjp01.html.
2. Locate the element: <div role="region" tabindex="0" class="map-container visualization-container bottom map us outline-none position-relative">
3. Confirm the Siteimprove Alfa finding for rule sia-r40.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html
- https://www.cdc.gov/salmonella/outbreaks/meats-01-24/locations.html
- https://www.cdc.gov/salmonella/outbreaks/chameleons-05-26/locations.html
- https://www.cdc.gov/west-nile-virus/data-maps/historic-data.html
- http://www.cdc.gov/nchs/data_access/urban_rural.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r40

### Example pages
- http://www.cdc.gov/salmonella/php/data-research/repjjp01.html
- https://www.cdc.gov/salmonella/outbreaks/meats-01-24/locations.html
- https://www.cdc.gov/salmonella/outbreaks/chameleons-05-26/locations.html

---

## Element with orientation is not locked (WCAG criterion undetermined)

**Bug ID:** `VS-e2bc58aa`  
**Pattern ID:** `VS-7fbb8b20`  
**URL:** https://www.cdc.gov/mmwr/volumes/66/wr/mm6649md.htm?s_cid=mm6649md_w  
**XPath / selector:** `{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r59` ([reference](https://alfa.siteimprove.com/rules/sia-r59))  
**Severity:** Moderate  
**Frequency:** 5 instances; 5 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (13 weeks)

### Description
Element with orientation is not locked. Detected by Siteimprove Alfa rule sia-r59 on 5 of 3333 scanned pages (5 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwr/volumes/66/wr/mm6649md.htm?s_cid=mm6649md_w.
2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
3. Confirm the Siteimprove Alfa finding for rule sia-r59.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6649md.htm?s_cid=mm6649md_w
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2025-2026/data/iliage26.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt27.html
- https://www.cdc.gov/brfss/acbs/2017/files/acbs_2017_adult_public_llcp_codebook-508.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r59

### Example pages
- https://www.cdc.gov/mmwr/volumes/66/wr/mm6649md.htm?s_cid=mm6649md_w
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2025-2026/data/iliage26.html

---

## First focusable element is link to main content (WCAG criterion undetermined)

**Bug ID:** `VS-cf846aa0`  
**Pattern ID:** `VS-aa242c2d`  
**URL:** https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html  
**XPath / selector:** `{"type":"document","children":[{"type":"element","children":[{"type":"element","`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r87` ([reference](https://alfa.siteimprove.com/rules/sia-r87))  
**Severity:** Moderate  
**Frequency:** 5 instances; 5 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (14 weeks)

### Description
First focusable element is link to main content. Detected by Siteimprove Alfa rule sia-r87 on 5 of 3333 scanned pages (5 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html.
2. Locate the element: {"type":"document","children":[{"type":"element","children":[{"type":"element","
3. Confirm the Siteimprove Alfa finding for rule sia-r87.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html
- https://www.cdc.gov/wtc/zadroga_1year.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2025-2026/data/iliage26.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/data/senAllregt27.html
- https://www.cdc.gov/brfss/acbs/2017/files/acbs_2017_adult_public_llcp_codebook-508.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r87

### Example pages
- https://www.cdc.gov/flu/weekly/weeklyarchives2023-2024/PedFlu01.html
- https://www.cdc.gov/wtc/zadroga_1year.html
- https://www.cdc.gov/flu/weekly/weeklyarchives2025-2026/data/iliage26.html

---

## Keyboard trap does not exist (WCAG criterion undetermined)

**Bug ID:** `VS-d25bafbc`  
**Pattern ID:** `VS-4c341c77`  
**URL:** https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm  
**XPath / selector:** `<p align="center">`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r85` ([reference](https://alfa.siteimprove.com/rules/sia-r85))  
**Severity:** Moderate  
**Frequency:** 2 instances; 2 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (11 weeks)

### Description
Keyboard trap does not exist. Detected by Siteimprove Alfa rule sia-r85 on 2 of 3333 scanned pages (2 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm.
2. Locate the element: <p align="center">
3. Confirm the Siteimprove Alfa finding for rule sia-r85.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su48a7.htm

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r85

### Example pages
- https://www.cdc.gov/mmwR/preview/mmwrhtml/rr5102a1.htm
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su48a7.htm

---

## Assertive live region is marked as atomic (WCAG criterion undetermined)

**Bug ID:** `VS-775df255`  
**Pattern ID:** `VS-c461a167`  
**URL:** https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html  
**XPath / selector:** `<table class="table table-striped table-width-unset data-table horizontal" aria-live="assertive" aria-rowcount="2">`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r54` ([reference](https://alfa.siteimprove.com/rules/sia-r54))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (13 weeks)

### Description
Assertive live region is marked as atomic. Detected by Siteimprove Alfa rule sia-r54 on 1 of 3333 scanned pages (1 instances).

### Steps to reproduce
1. Open https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html.
2. Locate the element: <table class="table table-striped table-width-unset data-table horizontal" aria-live="assertive" aria-rowcount="2">
3. Confirm the Siteimprove Alfa finding for rule sia-r54.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/figure-3-8.html

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r54

---

## Form field error is identified and described (WCAG criterion undetermined)

**Bug ID:** `VS-7b36a7eb`  
**Pattern ID:** `VS-e43903a1`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a9.htm?s_cid=mm6019a9_w  
**XPath / selector:** `<small>`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r75` ([reference](https://alfa.siteimprove.com/rules/sia-r75))  
**Severity:** Moderate  
**Frequency:** 8 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (13 weeks)

### Description
Form field error is identified and described. Detected by Siteimprove Alfa rule sia-r75 on 1 of 3333 scanned pages (8 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a9.htm?s_cid=mm6019a9_w.
2. Locate the element: <small>
3. Confirm the Siteimprove Alfa finding for rule sia-r75.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a9.htm?s_cid=mm6019a9_w

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r75

---

## Obsolete <blink> element (WCAG criterion undetermined)

**Bug ID:** `VS-aba8c1d1`  
**Pattern ID:** `VS-a84da368`  
**URL:** http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm  
**XPath / selector:** `blink`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `blink-element`  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 3333 pages affected
  
**History:** first seen 2026-W25, last seen 2026-W39 (12 weeks)

### HTML snippet
```html
<blink><big><strong>Disclaimer</strong></big>
</blink>
```

### Description
Obsolete <blink> element. Detected by deprecated-html rule blink-element on 1 of 3333 scanned pages (1 instances).

### Steps to reproduce
1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm.
2. Locate the element: blink
3. Confirm the deprecated-html finding for rule blink-element.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5205a1.htm

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.