vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W38

Automated Accessibility Conformance Report (OpenACR): Download ACR. Machine-readable; compatible with GSA OpenACR tooling. Automated tools find ~⅓ of real barriers — supplement with manual AT testing.

Training priorities

Top WCAG success criteria by pages affected this week. Use these to focus team training on the highest-impact issues.

SCCriterionPagesRulesNotes
1.4.3 Contrast (Minimum) 471 2
2.5.5 WCAG 2.5.5 432 1
3.1.1 Language of Page 419 2
1.1.1 Non-text Content (images, icons) 416 2
1.4.6 WCAG 1.4.6 364 1

Next 10 actions

Clusters are fingerprinted by normalized selector path + rule id + snippet shape. Rank score = (severity weight × pages affected) / distinct components for the rule. This supersedes the template threshold heuristic while still surfacing it as a validation signal.

Top 10 clustered component fixes for this week.
ClusterSeverityPagesWho it affectsHow to fixEvidenceDecision
<html> element must have a lang attribute · unattributed component
Fix one place, resolve ~334 finding(s) on 334 page(s).
XPath / selector: html
<html>
 Serious 334 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~363 finding(s) on 363 page(s).
XPath / selector: html
<html>
 Moderate 363 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~90 finding(s) on 90 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="Insert e-mail" value="Insert e-mail" onfocus="this.value=''">
 Serious 90 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~85 finding(s) on 85 page(s).
XPath / selector: <html>
 Moderate 85 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~55 finding(s) on 55 page(s).
XPath / selector: html
<html lang="es-us" class="cdc-theme-cdc cdc-page-type--content" style="--mobile-header-offset: 0px;">
 Moderate 55 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~95 finding(s) on 95 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
 Moderate 95 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~226 finding(s) on 226 page(s).
XPath / selector: img[height="10"][alt=" "][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="1" height="10" alt=" " border="0">
 Critical 226 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~450 finding(s) on 225 page(s).
XPath / selector: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">
 Critical 225 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Form elements must have labels · unattributed component
Fix one place, resolve ~95 finding(s) on 95 page(s).
XPath / selector: #searchBox
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
 Critical 95 Without vision, Limited vision, Limited manipulation/strength Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) c · unattributed component
Fix one place, resolve ~510 finding(s) on 510 page(s).
XPath / selector: .page-right-rail__static
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
 Moderate 510 Requires manual testing. 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. pages (CSV)

Bug reports

30 issue type(s) are shown by default out of 75 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 5 critical, 17 serious, 49 moderate, 4 minor. By WCAG category: 29 WCAG 2.0 A, 4 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 17 Best Practice, 18 Undetermined. Ordered by severity, key-page impact, WCAG level, and prevalence. Following accessibility bug-reporting best practices. Download: Markdown · JSON (full archive) · JSON (AI diagnostic) · CSV (all findings) · Priority pages CSV · Priority pages JSON.

Automated testing does not establish full WCAG conformance. Findings in the verification lane require manual testing before they are treated as confirmed failures.

The 50 highest-priority findings are shown in full; 25 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

5 finding(s) marked "possible duplicate" — Alfa and axe-core both flagged the same WCAG SC on overlapping pages. If they target the same element, the axe-core report is authoritative. Filter the CSV by possible_duplicate_of to see these. Two engines flagging the same barrier reduces the chance of a false positive.

Findings needing review

These findings need manual verification before they can be treated as confirmed failures. Obligation remains visible for each finding.

Serious axe html-has-lang WCAG 2.0 A <html> element must have a lang attribute (WCAG 3.1.1) 334/1858 pages · 334 instances Likely template
Bug ID
VS-65d3e804
Pattern ID
VS-c126b6a6
Combined ID
VS-65d3e804 (pattern VS-c126b6a6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
3.1.1 Language of Page (Level A, WCAG 2.0)
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<html>

Description

<html> element must have a lang attribute. Detected by axe-core rule html-has-lang on 334 of 1858 scanned pages (334 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 334 pages (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

Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 330/1858 pages · 3816 instances Likely template
Bug ID
VS-777e5ff0
Pattern ID
VS-9074b4dd
Combined ID
VS-777e5ff0 (pattern VS-9074b4dd) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
a[href$="cdc.gov/"] > img[height="8"][alt=" "]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<img src="http://www.cdc.gov/navimages/nav21.gif" border="0" alt=" " width="140" height="8">

Description

Images must have alternative text. Detected by axe-core rule image-alt on 330 of 1858 scanned pages (3816 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: a[href$="cdc.gov/"] > img[height="8"][alt=" "]
  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

…and more — all 330 pages (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

Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 322/1858 pages · 475 instances Likely template
Bug ID
VS-125e48c5
Pattern ID
VS-be8d563e
Combined ID
VS-125e48c5 (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
a[name="content_area"] > font[color="red"]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 322 of 1858 scanned pages (475 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4843a5.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

…and more — all 322 pages (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

Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 141/1858 pages · 438 instances Likely template
Bug ID
VS-9b7b0d18
Pattern ID
VS-e9fe47ac
Combined ID
VS-9b7b0d18 (pattern VS-e9fe47ac) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<a href="http://www.cdc.gov/"><img src="http://www.cdc.gov/navimages/nav21.gif" border="0" alt=" " width="140" height="8"></a>

Description

Links must have discernible text. Detected by axe-core rule link-name on 141 of 1858 scanned pages (438 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
  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

…and more — all 141 pages (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

Critical axe label WCAG 2.0 A Form elements must have labels (WCAG 4.1.2) 101/1858 pages · 104 instances Likely template
Bug ID
VS-2971dd61
Pattern ID
VS-fafffee0
Combined ID
VS-2971dd61 (pattern VS-fafffee0) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#searchBox
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 101 of 1858 scanned pages (104 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6037md.htm?s_cid=mm6037md_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

…and more — all 101 pages (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

Serious axe link-in-text-block WCAG 2.0 A Links must be distinguishable without relying on color (WCAG 1.4.1) 47/1858 pages · 86 instances Likely template
Bug ID
VS-5ca3a17d
Pattern ID
VS-8ade3360
Combined ID
VS-5ca3a17d (pattern VS-8ade3360) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.4.1 Use of Color (Level A, WCAG 2.0)
XPath / selector
.all-pages
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 47 of 1858 scanned pages (86 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/infection-control/hcp/disinfection-and-sterilization/flash-steam-sterilization-parameters.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

…and more — all 47 pages (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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 21/1858 pages · 47 instances Likely template
Bug ID
VS-d0d36670
Pattern ID
VS-a0bdbdf6
Combined ID
VS-d0d36670 (pattern VS-a0bdbdf6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
ol
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<ol type="1">

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 21 of 1858 scanned pages (47 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00017426.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

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 16/1858 pages · 34 instances Likely template
Bug ID
VS-b9a997df
Pattern ID
VS-c613c153
Combined ID
VS-b9a997df (pattern VS-c613c153) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.1.1 Keyboard (Level A, WCAG 2.0)
XPath / selector
.cdc_page_element.dfe-block--width-standard.dfe-block--cdcmodule:nth-child(5) > .dfe-block__inner > .cdc-textblock > div
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<div style="overflow-x: auto;">

Description

Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 16 of 1858 scanned pages (34 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/fluview/surveillance/2024-week-48.html.
  2. Locate the element: .cdc_page_element.dfe-block--width-standard.dfe-block--cdcmodule:nth-child(5) > .dfe-block__inner > .cdc-textblock > 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

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

Serious axe td-headers-attr WCAG 2.0 A Table cell headers attributes must refer to other <th> elements in the same tabl (WCAG 1.3.1) 13/1858 pages · 15 instances Likely template
Bug ID
VS-653cd004
Pattern ID
VS-07ba3b17
Combined ID
VS-653cd004 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
table
History
first seen 2026-W25, last seen 2026-W38 (14 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 13 of 1858 scanned pages (15 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/acbs/2011/prevalence_tables/table13.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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 8/1858 pages · 10 instances
Bug ID
VS-68d794ad
Pattern ID
VS-4b45acfe
Combined ID
VS-68d794ad (pattern VS-4b45acfe) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.2.2 Pause, Stop, Hide (Level A, WCAG 2.0)
XPath / selector
blink
History
first seen 2026-W25, last seen 2026-W38 (14 wk)

HTML snippet — use this to validate the finding without re-running the tool

<blink><big><strong>Disclaimer</strong></big></blink>

Description

<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 8 of 1858 scanned pages (10 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5415a1.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

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 7/1858 pages · 82 instances
Bug ID
VS-d12ffc71
Pattern ID
VS-5c82bd60
Combined ID
VS-d12ffc71 (pattern VS-5c82bd60) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 7 of 1858 scanned pages (82 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/children-mental-health/es/data-research/datos-y-estadisticas-sobre-la-salud-mental-de-los-ninos.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

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

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 7/1858 pages · 15 instances
Bug ID
VS-99ea0594
Pattern ID
VS-3f76c7ea
Combined ID
VS-99ea0594 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
div[data-yt-id="AJhLlkX6j-s"] > iframe[allowfullscreen="allowfullscreen"][title=""]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<iframe src="//www.youtube-nocookie.com/embed/AJhLlkX6j-s?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.

Description

Frames must have an accessible name. Detected by axe-core rule frame-title on 7 of 1858 scanned pages (15 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/antimicrobial-resistance/causes/environmental-food.html.
  2. Locate the element: div[data-yt-id="AJhLlkX6j-s"] > iframe[allowfullscreen="allowfullscreen"][title=""]
  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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 6/1858 pages · 20 instances
Bug ID
VS-f2651e80
Pattern ID
VS-fab92378
Combined ID
VS-f2651e80 (pattern VS-fab92378) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#state_US
History
first seen 2026-W25, last seen 2026-W38 (14 wk)

HTML snippet — use this to validate the finding without re-running the tool

<select id="state_US" class="ReaderSearchInput" name="state" size="1">

Description

Select element must have an accessible name. Detected by axe-core rule select-name on 6 of 1858 scanned pages (20 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/chestradiography/php/breader/index.html.
  2. Locate the element: #state_US
  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

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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 5/1858 pages · 15 instances
Bug ID
VS-1fc9862e
Pattern ID
VS-58301a87
Combined ID
VS-1fc9862e (pattern VS-58301a87) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#acc-header-2
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<div class="card-header h4 bg-white rounded-0 collapsed" role="tab" id="acc-header-2" href="#acc-panel-2" data-toggle="collapse" data-parent="#accordion-2" aria-controls="acc-panel-2" aria-expanded="f

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 5 of 1858 scanned pages (15 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/tobacco/campaign/tips/spanish/poblaciones/indoamericanos-o-nativos-de-alaska.html.
  2. Locate the element: #acc-header-2
  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

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

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 4/1858 pages · 29 instances
Bug ID
VS-7d24023d
Pattern ID
VS-6175596b
Combined ID
VS-7d24023d (pattern VS-6175596b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-row.row[role="row"]:nth-child(1) > .table-col[data-col="2"][role="cell"] > li
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<li>0-17</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 4 of 1858 scanned pages (29 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vision-health-data/data-sources/national-survey-of-childrens-health.html.
  2. Locate the element: .table-row.row[role="row"]:nth-child(1) > .table-col[data-col="2"][role="cell"] > 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

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

Critical axe button-name WCAG 2.0 A Buttons must have discernible text (WCAG 4.1.2) 2/1858 pages · 2 instances Likely content
Bug ID
VS-baec1b22
Pattern ID
VS-e7298c00
Combined ID
VS-baec1b22 (pattern VS-e7298c00) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#search__icon
History
first seen 2026-W26, last seen 2026-W38 (10 wk)

HTML snippet — use this to validate the finding without re-running the tool

<button id="search__icon" class="c-search__icon"></button>

Description

Buttons must have discernible text. Detected by axe-core rule button-name on 2 of 1858 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hiv/about?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Fhiv%2Fbasics%2Fwhatishiv.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

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

Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 2/1858 pages · 4 instances Likely content
Bug ID
VS-139ce83d
Pattern ID
VS-dd1c019f
Combined ID
VS-139ce83d (pattern VS-dd1c019f) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
3.1.2 Language of Parts (Level AA, WCAG 2.0)
XPath / selector
.dfe-curated-link__download.has-content > .download-container > a[lang="__"][download="covercough_hcp8-5x11_khm.pdf"][aria-label="Download"]
History
first seen 2026-W24, last seen 2026-W38 (9 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 1858 scanned pages (4 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

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

Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 1/1858 pages · 6 instances Likely content
Bug ID
VS-f7eb7de8
Pattern ID
VS-9429bb8d
Combined ID
VS-f7eb7de8 (pattern VS-9429bb8d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
#accordion-4
History
first seen 2026-W25, last seen 2026-W38 (12 wk)

HTML snippet — use this to validate the finding without re-running the tool

<div class="accordion indicator-plus accordion-white mb3" id="accordion-4" role="tablist">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 1858 scanned pages (6 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/free-mind/parents/real-talk.html.
  2. Locate the element: #accordion-4
  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

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 1662/1858 pages · 13022 instances Likely template
Bug ID
VS-38a56941
Pattern ID
VS-f18df681
Combined ID
VS-38a56941 (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
table[width="100%"][cellpadding="0"]:nth-child(6) > tbody > tr:nth-child(2)
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<tr>

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 1662 of 1858 scanned pages (13022 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: table[width="100%"][cellpadding="0"]:nth-child(6) > tbody > tr:nth-child(2)
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1662 pages (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

Serious axe label-title-only Best Practice Form elements should have a visible label (WCAG criterion undetermined) 90/1858 pages · 90 instances Likely template
Bug ID
VS-b09af7b4
Pattern ID
VS-33841929
Combined ID
VS-b09af7b4 (pattern VS-33841929) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.smallfield
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 90 of 1858 scanned pages (90 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/may/09_0123.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

…and more — all 90 pages (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

Serious axe aria-dialog-name Best Practice ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined) 2/1858 pages · 2 instances Likely content
Bug ID
VS-83e60365
Pattern ID
VS-fa724f90
Combined ID
VS-83e60365 (pattern VS-fa724f90) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#tooltip-\:ra\:
History
first seen 2026-W29, last seen 2026-W38 (8 wk)

HTML snippet — use this to validate the finding without re-running the tool

<a id="tooltip-:ra:" role="dialog" tabindex="0" class="cove-tooltip--target" data-tooltip-float="false" data-tooltip-place="top" data-tooltip-isopen="true">

Description

ARIA dialog and alertdialog nodes should have an accessible name. Detected by axe-core rule aria-dialog-name on 2 of 1858 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/autism/data-research/autism-data-visualization-tool.html.
  2. Locate the element: #tooltip-\:ra\:
  3. Confirm the axe-core finding for rule aria-dialog-name.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

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

Serious axe tabindex Best Practice Elements should not have tabindex greater than zero (WCAG criterion undetermined) 1/1858 pages · 3 instances Likely content
Bug ID
VS-8ce894db
Pattern ID
VS-7430f84c
Combined ID
VS-8ce894db (pattern VS-7430f84c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
a[href$="#content"]
History
first seen 2026-W24, last seen 2026-W38 (7 wk)

HTML snippet — use this to validate the finding without re-running the tool

<a class="skippy visually-hidden-focusable" href="#content" tabindex="1">Ir al contenido del sitio</a>

Description

Elements should not have tabindex greater than zero. Detected by axe-core rule tabindex on 1 of 1858 scanned pages (3 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/spanish.
  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

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

Moderate alfa sia-r69 WCAG 2.0 AA Text has sufficient color contrast (Enhanced) (WCAG 1.4.3) 149/1858 pages · 843 instances Likely template
Bug ID
VS-c07d8d6d
Pattern ID
VS-f7e99f4b
Combined ID
VS-c07d8d6d (pattern VS-f7e99f4b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
text: "Published on June 15, 2010"
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 149 of 1858 scanned pages (843 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: text: "Published on June 15, 2010"
  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

…and more — all 149 pages (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

Moderate alfa sia-r113 WCAG 2.2 AA Target size is at least 24×24 CSS pixels or has spacing (Minimum) (WCAG 2.5.8) 145/1858 pages · 1323 instances Likely template
Bug ID
VS-c4fe3948
Pattern ID
VS-179ad9b3
Combined ID
VS-c4fe3948 (pattern VS-179ad9b3) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.2 AA
Obligation
required
Handling
review
WCAG SC
2.5.8 Target Size (Minimum) (Level AA, WCAG 2.2)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 145 of 1858 scanned pages (1323 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 145 pages (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

Moderate alfa sia-r2 WCAG 2.0 A Image has accessible name (WCAG 1.1.1) 86/1858 pages · 791 instances Likely template
Bug ID
VS-4129db5d
Pattern ID
VS-a24eaa8c
Combined ID
VS-4129db5d (pattern VS-a24eaa8c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
<img src="http://www.cdc.gov/navimages/nav21.gif" border="0" alt=" " width="140">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 86 of 1858 scanned pages (791 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: <img src="http://www.cdc.gov/navimages/nav21.gif" border="0" alt=" " width="140">
  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

…and more — all 86 pages (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

Moderate alfa sia-r4 WCAG 2.0 A Document has a valid lang attribute (WCAG 3.1.1) 85/1858 pages · 85 instances Likely template
Bug ID
VS-6661100e
Pattern ID
VS-7a0e5645
Combined ID
VS-6661100e (pattern VS-7a0e5645) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
3.1.1 Language of Page (Level A, WCAG 2.0)
XPath / selector
<html>
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 85 of 1858 scanned pages (85 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 85 pages (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

Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 66/1858 pages · 129 instances Likely template
Bug ID
VS-9110246b
Pattern ID
VS-f7dba940
Combined ID
VS-9110246b (pattern VS-f7dba940) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.1 A
Obligation
required
Handling
review
WCAG SC
2.5.3 Label in Name (Level A, WCAG 2.1)
XPath / selector
<a href="/listeria/about/index.html" class="cdc-footer__super-title" aria-label="<em>Listeria </em>Infection (Listeriosis)">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 66 of 1858 scanned pages (129 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/listeria/outbreaks/delimeats-7-24/index.html.
  2. Locate the element: <a href="/listeria/about/index.html" class="cdc-footer__super-title" aria-label="<em>Listeria </em>Infection (Listeriosis)">
  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

…and more — all 66 pages (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

Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 52/1858 pages · 509 instances Likely template
Bug ID
VS-8689b181
Pattern ID
VS-d6097011
Combined ID
VS-8689b181 (pattern VS-d6097011) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<ul>
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 52 of 1858 scanned pages (509 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/corrections/about/index.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

…and more — all 52 pages (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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 30/1858 pages · 135 instances Likely template
Bug ID
VS-0abc5280
Pattern ID
VS-28ebd979
Combined ID
VS-0abc5280 (pattern VS-28ebd979) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
<a href="http://www.cdc.gov/">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 30 of 1858 scanned pages (135 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 30 pages (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

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 22/1858 pages · 32 instances Likely template
Bug ID
VS-5c24038d
Pattern ID
VS-a48e6078
Combined ID
VS-5c24038d (pattern VS-a48e6078) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
<input id="searchBox" class="searchBox" name="query" maxlength="256">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 22 of 1858 scanned pages (32 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6037md.htm?s_cid=mm6037md_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

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

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 518/1858 pages · 534 instances Likely template
Bug ID
VS-56e1ae8c
Pattern ID
VS-8806389c
Combined ID
VS-56e1ae8c (pattern VS-8806389c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.page-right-rail__static
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 518 of 1858 scanned pages (534 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/colorectal-cancer/risk-factors/index.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

…and more — all 518 pages (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

Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 504/1858 pages · 688 instances Likely template
Bug ID
VS-9d7f38a2
Pattern ID
VS-d25f622d
Combined ID
VS-9d7f38a2 (pattern VS-d25f622d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
h3
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<h3>References </h3>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 504 of 1858 scanned pages (688 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00021095.htm.
  2. Locate the element: h3
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 504 pages (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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 458/1858 pages · 458 instances Likely template
Bug ID
VS-9682ffae
Pattern ID
VS-d5d82446
Combined ID
VS-9682ffae (pattern VS-d5d82446) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<html>

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 458 of 1858 scanned pages (458 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 458 pages (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

Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 432/1858 pages · 12969 instances Likely template
Bug ID
VS-d1f812b1
Pattern ID
VS-cb53cc4d
Combined ID
VS-d1f812b1 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 432 of 1858 scanned pages (12969 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 432 pages (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

Moderate alfa sia-r66 WCAG 2.x AAA Text has enhanced contrast (WCAG 1.4.6) 364/1858 pages · 11971 instances Likely template
Bug ID
VS-79f7dbe0
Pattern ID
VS-646b1e0b
Combined ID
VS-79f7dbe0 (pattern VS-646b1e0b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.6 Contrast (Enhanced) (Level AAA, WCAG 2.0)
XPath / selector
text: "Emerging Infectious Diseases Journal"
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 364 of 1858 scanned pages (11971 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.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

…and more — all 364 pages (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

Moderate alfa sia-r57 Undetermined Scrolling content can be accessed by keyboard (WCAG criterion undetermined) 324/1858 pages · 4878 instances Likely template
Bug ID
VS-e9632198
Pattern ID
VS-c18be945
Combined ID
VS-e9632198 (pattern VS-c18be945) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
text: "Skip directly to search"
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 324 of 1858 scanned pages (4878 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/colorectal-cancer/risk-factors/index.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

…and more — all 324 pages (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

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 231/1858 pages · 243 instances Likely template
Bug ID
VS-a9b08648
Pattern ID
VS-e05344b9
Combined ID
VS-a9b08648 (pattern VS-e05344b9) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
@aria-label="Official website of the United States government"
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 231 of 1858 scanned pages (243 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/colorectal-cancer/risk-factors/index.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

…and more — all 231 pages (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

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 177/1858 pages · 12173 instances Likely template
Bug ID
VS-f02504b6
Pattern ID
VS-fbf54eba
Combined ID
VS-f02504b6 (pattern VS-fbf54eba) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p class="deck">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 177 of 1858 scanned pages (12173 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: <p class="deck">
  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

…and more — all 177 pages (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

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 138/1858 pages · 30826 instances Likely template
Bug ID
VS-7827616e
Pattern ID
VS-2208081b
Combined ID
VS-7827616e (pattern VS-2208081b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p class="deck">
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 138 of 1858 scanned pages (30826 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: <p class="deck">
  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

…and more — all 138 pages (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

Moderate alfa sia-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 123/1858 pages · 163 instances Likely template
Bug ID
VS-885561ff
Pattern ID
VS-f054f4a4
Combined ID
VS-885561ff (pattern VS-f054f4a4) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h3>
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 123 of 1858 scanned pages (163 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00021095.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

…and more — all 123 pages (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

Moderate alfa sia-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 100/1858 pages · 100 instances Likely template
Bug ID
VS-0c57a00b
Pattern ID
VS-3d033717
Combined ID
VS-0c57a00b (pattern VS-3d033717) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
advisory
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 100 of 1858 scanned pages (100 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2010/jul/toc.htm.
  2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
  3. Confirm the Siteimprove Alfa finding for rule sia-r70.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 100 pages (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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 81/1858 pages · 93 instances Likely template
Bug ID
VS-98c52b50
Pattern ID
VS-4fac2f41
Combined ID
VS-98c52b50 (pattern VS-4fac2f41) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
img[alt="2008-118sp"]
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<img src="/niosh/media/images/2026/05/2008-118_sp-cover.jpg" alt="2008-118sp" role="presentation">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 81 of 1858 scanned pages (93 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/publications/es/numbered/2008-118sp.html.
  2. Locate the element: img[alt="2008-118sp"]
  3. Confirm the axe-core finding for rule aria-allowed-role.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 81 pages (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

Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 55/1858 pages · 55 instances Likely template
Bug ID
VS-742aab37
Pattern ID
VS-fa44f293
Combined ID
VS-742aab37 (pattern VS-fa44f293) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<html lang="es-us" class="cdc-theme-cdc cdc-page-type--content" style="--mobile-header-offset: 0px;">

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 55 of 1858 scanned pages (55 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/sti/es/site.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

…and more — all 55 pages (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

Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 39/1858 pages · 5040 instances Likely template
Bug ID
VS-bafcf2ac
Pattern ID
VS-04a9d28c
Combined ID
VS-bafcf2ac (pattern VS-04a9d28c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Presentational attribute (use CSS) [presentational-attr]
XPath / selector
body
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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 39 of 1858 scanned pages (5040 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5114md.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

…and more — all 39 pages (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.

Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 37/1858 pages · 37 instances Likely template
Bug ID
VS-509f0602
Pattern ID
VS-7118fead
Combined ID
VS-509f0602 (pattern VS-7118fead) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 37 of 1858 scanned pages (37 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/sti/es/site.html.
  2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
  3. Confirm the Siteimprove Alfa finding for rule sia-r61.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 37 pages (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

Moderate alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 33/1858 pages · 37 instances Likely template
Bug ID
VS-3c4f2ae8
Pattern ID
VS-2cd767ca
Combined ID
VS-3c4f2ae8 (pattern VS-2cd767ca) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h5>
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 33 of 1858 scanned pages (37 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/66/wr/mm6614a4.htm?s_cid=mm6614a4_w.
  2. Locate the element: <h5>
  3. Confirm the Siteimprove Alfa finding for rule sia-r78.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 33 pages (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

Minor axe empty-heading Best Practice Headings should not be empty (WCAG criterion undetermined) 32/1858 pages · 32 instances Likely template
Bug ID
VS-179ff5b1
Pattern ID
VS-0066c67d
Combined ID
VS-179ff5b1 (pattern VS-0066c67d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
h3:nth-child(27)
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<h3>
      </h3>

Description

Headings should not be empty. Detected by axe-core rule empty-heading on 32 of 1858 scanned pages (32 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5402a2.htm.
  2. Locate the element: h3:nth-child(27)
  3. Confirm the axe-core finding for rule empty-heading.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 32 pages (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

Minor axe empty-table-header Best Practice Table header text should not be empty (WCAG criterion undetermined) 31/1858 pages · 97 instances Likely template
Bug ID
VS-74cb4b23
Pattern ID
VS-d69fc059
Combined ID
VS-74cb4b23 (pattern VS-d69fc059) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#table-19 > tbody > tr:nth-child(2) > .col-head:nth-child(4)
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<th class="col-head" scope="col" rowspan="2">
							</th>

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 31 of 1858 scanned pages (97 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6037md.htm?s_cid=mm6037md_w.
  2. Locate the element: #table-19 > tbody > tr:nth-child(2) > .col-head:nth-child(4)
  3. Confirm the axe-core finding for rule empty-table-header.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 31 pages (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

Moderate deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 30/1858 pages · 245 instances Likely template
Bug ID
VS-20a690ad
Pattern ID
VS-91d2294a
Combined ID
VS-20a690ad (pattern VS-91d2294a) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Obsolete <font> element (use CSS) [font-element]
XPath / selector
font
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<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: <a href="mailto:mmwrq@cdc.gov">mmwrq@cdc.gov</a>

Description

Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 30 of 1858 scanned pages (245 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6037md.htm?s_cid=mm6037md_w.
  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

…and more — all 30 pages (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.

Moderate deprecated-html big-element Undetermined Obsolete <big> element (use CSS) (WCAG criterion undetermined) 22/1858 pages · 25 instances Likely template
Bug ID
VS-25b027bb
Pattern ID
VS-7845739d
Combined ID
VS-25b027bb (pattern VS-7845739d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Obsolete <big> element (use CSS) [big-element]
XPath / selector
big
History
first seen 2026-W24, last seen 2026-W38 (15 wk)

HTML snippet — use this to validate the finding without re-running the tool

<big><strong>Disclaimer</strong></big>

Description

Obsolete <big> element (use CSS). Detected by deprecated-html rule big-element on 22 of 1858 scanned pages (25 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5114md.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

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.

25 more lower-priority finding(s) — summary only

Full detail — steps, affected pages, snippets — for these and every finding is in the CSV.

SeverityFindingWCAG categoryPages
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 10
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 9
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 8
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 7
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 7
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 6
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 6
Moderate Table cell has header (WCAG 1.3.1) [sia-r77] WCAG 2.0 A 5
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 5
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 4
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 4
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 4
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 3
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 2
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 2
Moderate Scrollable element is keyboard accessible (WCAG 1.4.8) [sia-r80] WCAG 2.x AAA 2
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 2
Moderate Focus is not lost after interaction (WCAG criterion undetermined) [sia-r86] Undetermined 1
Moderate Element with lang attribute has correct language (WCAG 3.1.2) [sia-r7] WCAG 2.0 AA 1
Moderate Contentinfo landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-contentinfo-is-top-level] Best Practice 1
Moderate Document should not have more than one banner landmark (WCAG criterion undetermined) [landmark-no-duplicate-banner] Best Practice 1
Moderate Document should not have more than one contentinfo landmark (WCAG criterion undetermined) [landmark-no-duplicate-contentinfo] Best Practice 1
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 1
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] WCAG 2.0 A 1
Moderate Keyboard (WCAG 2.1.1) [sia-r84] WCAG 2.0 A 1

Deque axe-core findings

Rule-level axe-core summary (35 rule type(s))

Each failing rule links out to the axe-core documentation. For full element-level detail including HTML snippets and XPaths, see the bug reports above.

axe-core rules failing in 2026-W38, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 1662 13022 /pcd/issues/2010/jul/toc.htm
/colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html		 all 1662 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 518 534 /colorectal-cancer/risk-factors/index.html
/nchhstp/connections/issue-23-2.html
/global-hiv-tb/php/globalhiv/index.html		 all 518 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 504 688 /mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017426.htm
/pcd/issues/2010/may/09_0123.htm		 all 504 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 458 458 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/mm4843a5.htm
/mmwr/preview/mmwrhtml/00021095.htm		 all 458 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 334 334 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/mm4843a5.htm
/mmwr/preview/mmwrhtml/00021095.htm		 all 334 pages (CSV)
Images must have alternative text [image-alt] critical 330 3816 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/mm4843a5.htm
/mmwr/preview/mmwrhtml/00021095.htm		 all 330 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 322 475 /mmwr/preview/mmwrhtml/mm4843a5.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017426.htm		 all 322 pages (CSV)
Links must have discernible text [link-name] serious 141 438 /pcd/issues/2010/jul/toc.htm
/pcd/issues/2010/may/09_0123.htm
/PCD/issues/2008/apr/07_0053_es.htm		 all 141 pages (CSV)
Form elements must have labels [label] critical 101 104 /mmwr/preview/mmwrhtml/mm6037md.htm
/mmwr/preview/mmwrhtml/mm6016md.htm
/mmwr/preview/mmwrhtml/mm6034a2.htm		 all 101 pages (CSV)
Form elements should have a visible label [label-title-only] serious 90 90 /pcd/issues/2010/may/09_0123.htm
/PCD/issues/2008/apr/07_0053_es.htm
/pcd/issues/2005/apr/05_0027.htm		 all 90 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 81 93 /niosh/publications/es/numbered/2008-118sp.html
/niosh/docs/2022-128
/niosh/docs/2009-105		 all 81 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 55 55 /sti/es/site.html
/flu/weekly/weeklyarchives2023-2024/data/senAllregt24.html
/sleep/site.html		 all 55 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 47 86 /infection-control/hcp/disinfection-and-sterilization/flash-steam-sterilization-parameters.html
/grants/applying/tips.html
/iis/core-data-elements/problems.html		 all 47 pages (CSV)
Headings should not be empty [empty-heading] minor 32 32 /mmwr/preview/mmwrhtml/mm5402a2.htm
/mmwr/preview/mmwrhtml/mm5317a3.htm
/mmwr/preview/mmwrhtml/mm5343a5.htm		 all 32 pages (CSV)
Table header text should not be empty [empty-table-header] minor 31 97 /mmwr/preview/mmwrhtml/mm6037md.htm
/mmwr/preview/mmwrhtml/mm6016md.htm
/fluview/surveillance/2024-week-48.html		 all 31 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 21 47 /mmwr/preview/mmwrhtml/00017426.htm
/mmwr/preview/mmwrhtml/00015030.htm
/mmwr/preview/mmwrhtml/00016728.htm		 all 21 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 16 34 /fluview/surveillance/2024-week-48.html
/infection-control/hcp/environmental-control/appendix-b-air.html
/nchs/data/hestat/hestat122.htm		 all 16 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 13 15 /brfss/acbs/2011/prevalence_tables/table13.html
/brfss/acbs/2011/prevalence_tables/table11b.html
/asthma/nhis/2021/table2-1.htm		 all 13 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 10 10 /pcd/issues/2012/11_0305_es.htm
/nchs/ndi.htm
/pcd/issues/2012/12_0136_es.htm		 all 10 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 8 71 /iis/core-data-elements/problems.html
/fluview/surveillance/2024-week-48.html
/acip/GRADE/hepb.html		 all 8 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 8 10 /mmwr/preview/mmwrhtml/rr5415a1.htm
/mmwr/preview/mmwrhtml/mm5606a5.htm
/mmwr/preview/mmwrhtml/su5301a15.htm		 all 8 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 7 82 /children-mental-health/es/data-research/datos-y-estadisticas-sobre-la-salud-mental-de-los-ninos.html
/hepatitis-surveillance-2022/hepatitis-b/figure-2-5.html
/ebola/situation-summary/about-current-outbreak.html		 all 7 pages (CSV)
Frames must have an accessible name [frame-title] serious 7 15 /antimicrobial-resistance/causes/environmental-food.html
/niosh/noise/es/about/aplicacion-de-niosh-para-medir-el-nivel-de-sonido.html
/stophivtogether/prepared/index.html		 all 7 pages (CSV)
Select element must have an accessible name [select-name] critical 6 20 /niosh/chestradiography/php/breader/index.html
/wtc/contact.html
/nchs/products/databriefs.htm		 all 6 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 5 15 /tobacco/campaign/tips/spanish/poblaciones/indoamericanos-o-nativos-de-alaska.html
/tb/statistics/reports/2022/state_local_data.htm
/diabetes/burden-toolkit/state-burden-toolkit-mortality.html		 all 5 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 4 29 /vision-health-data/data-sources/national-survey-of-childrens-health.html
/hepatitis/hcv/guidelinesc.htm
/pertussis/vaccines/types.html		 all 4 pages (CSV)
lang attribute must have a valid value [valid-lang] serious 2 4 /flu-resources/php/resources/cover-your-cough-health-care-flyer.html
/naegleria/prevention/sinus-rinsing.html		 all 2 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 2 3 /mmwr/volumes/66/wr/mm6616a2.htm
/spanish		 all 2 pages (CSV)
Buttons must have discernible text [button-name] critical 2 2 /hiv/about
/hiv/about/index.html		 all 2 pages (CSV)
ARIA dialog and alertdialog nodes should have an accessible name [aria-dialog-name] serious 2 2 /autism/data-research/autism-data-visualization-tool.html
/wtc/exhibition		 all 2 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 1 6 /free-mind/parents/real-talk.html all 1 pages (CSV)
Elements should not have tabindex greater than zero [tabindex] serious 1 3 /spanish all 1 pages (CSV)
Contentinfo landmark should not be contained in another landmark [landmark-contentinfo-is-top-level] moderate 1 1 /spanish all 1 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner] moderate 1 1 /spanish all 1 pages (CSV)
Document should not have more than one contentinfo landmark [landmark-no-duplicate-contentinfo] moderate 1 1 /spanish all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (35 rule type(s))

Rule-level summary from Siteimprove Alfa (W3C ACT-based). Findings that overlap with axe-core on the same WCAG success criterion are noted as possible duplicates in the bug reports above.

Alfa rules failing in 2026-W38, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 432 12969 /pcd/issues/2010/jul/toc.htm
/colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html		 all 432 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 364 11971 /pcd/issues/2010/jul/toc.htm
/colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html		 all 364 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 324 4878 /colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html
/global-hiv-tb/php/globalhiv/index.html		 all 324 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 231 243 /colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html
/global-hiv-tb/php/globalhiv/index.html		 all 231 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 177 12173 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 177 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 149 843 /pcd/issues/2010/jul/toc.htm
/colorectal-cancer/risk-factors/index.html
/thalassemia/stories/chanapa-tantibanchachais-story.html		 all 149 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 145 1323 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 145 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 138 30826 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 138 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 123 163 /mmwr/preview/mmwrhtml/00021095.htm
/mmwr/volumes/66/wr/mm6614a4.htm
/mmwr/volumes/66/wr/mm6650a7.htm		 all 123 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 100 100 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 100 pages (CSV)
Image has accessible name [sia-r2] n/a 86 791 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 86 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 85 85 /pcd/issues/2010/jul/toc.htm
/mmwr/preview/mmwrhtml/00021095.htm
/mmwr/preview/mmwrhtml/00017425.htm		 all 85 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 66 129 /listeria/outbreaks/delimeats-7-24/index.html
/environmental-exposure-report/whats-new/whats_new_072010.html
/hepatitis-surveillance-2021/about/technical-notes.html		 all 66 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 52 509 /niosh/corrections/about/index.html
/niosh/maritime/about/seafood-processing.html
/model-aquatic-health-code/php/about/creating-the-mahc.html		 all 52 pages (CSV)
Form field label is visible [sia-r61] n/a 37 37 /sti/es/site.html
/mmwr/preview/mmwrhtml/mm6037md.htm
/vaccines/hcp/storage-handling/providers-role.html		 all 37 pages (CSV)
Table header has scope [sia-r78] n/a 33 37 /mmwr/volumes/66/wr/mm6614a4.htm
/mmwr/volumes/66/wr/mm6650a7.htm
/fluview/surveillance/2024-week-48.html		 all 33 pages (CSV)
Link has accessible name [sia-r11] n/a 30 135 /pcd/issues/2010/jul/toc.htm
/pcd/issues/2007/oct/07_0012_fr.htm
/niosh-rtecs/VI8A61C8.html		 all 30 pages (CSV)
Form field has accessible name [sia-r8] n/a 22 32 /mmwr/preview/mmwrhtml/mm6037md.htm
/mmwr/preview/mmwrhtml/mm6439a11.htm
/mmwr/preview/mmwrhtml/mm5952md.htm		 all 22 pages (CSV)
Element has required owned roles [sia-r64] n/a 9 9 /mmwr/preview/mmwrhtml/mm5310a2.htm
/mmwr/preview/mmwrhtml/mm5128a5.htm
/mmwr/preview/mmwrhtml/mm5126a1.htm		 all 9 pages (CSV)
Element has required aria-owns [sia-r46] n/a 7 167 /brfss/acbs/2011/prevalence_tables/table13.html
/brfss/acbs/2010/prevalence_tables/table5b.html
/pcd/issues/2009/jan/07_0244.htm		 all 7 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 7 9 /global-health/countries/drc.html
/autism/data-research/autism-data-visualization-tool.html
/hepatitis/statistics/2021surveillance/hepatitis-b/figure-2.8.htm		 all 7 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 6 31 /mmwr/preview/mmwrhtml/00046714.htm
/mmwr/preview/mmwrhtml/00046702.htm
/mmwr/preview/mmwrhtml/00054287.htm		 all 6 pages (CSV)
Table cell has header [sia-r77] n/a 5 3144 /mmwr/preview/mmwrhtml/mm6037md.htm
/fluview/surveillance/2024-week-48.html
/asthma/nhis/2021/table2-1.htm		 all 5 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 5 1168 /brfss/acbs/2011/prevalence_tables/table13.html
/asthma/nhis/2021/table2-1.htm
/brfss/acbs/2010/prevalence_tables/table5b.html		 all 5 pages (CSV)
Button has accessible name [sia-r12] n/a 4 52 /hepatitis-surveillance-2022/hepatitis-b/figure-2-5.html
/hepatitis-surveillance-2022/hepatitis-c/figure-3-5.html
/hepatitis-surveillance-2021/hepatitis-b/figure-2-4.html		 all 4 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 4 4 /wtc/newsYouthCohortDeadline_20230818.html
/wtc/contact.html
/wtc/vcfcompare.html		 all 4 pages (CSV)
Input purpose can be determined [sia-r60] n/a 4 4 /pcd/issues/2012/11_0109.htm
/pcd/issues/2013/12_0142_es.htm
/pcd/issues/2013/12_0204.htm		 all 4 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 3 3 /hepatitis-surveillance-2022/hepatitis-b/figure-2-5.html
/hepatitis-surveillance-2022/hepatitis-c/figure-3-5.html
/hepatitis-surveillance-2021/hepatitis-b/figure-2-4.html		 all 3 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 2 4 /diabetes/burden-toolkit/state-burden-toolkit-mortality.html
/free-mind/parents/real-talk.html		 all 2 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 2 2 /pcd/issues/2010/jul/toc.htm
/spanish		 all 2 pages (CSV)
Focus is not lost after interaction [sia-r86] n/a 1 6 /pcd/issues/2020/20_0026.htm all 1 pages (CSV)
Element with lang attribute has correct language [sia-r7] n/a 1 3 /naegleria/prevention/sinus-rinsing.html all 1 pages (CSV)
sia-r84 n/a 1 1 /hepatitis-surveillance-2021/about/technical-notes.html all 1 pages (CSV)
sia-r76 n/a 1 1 /asthma/nhis/2021/table2-1.htm all 1 pages (CSV)
Form field error is identified and described [sia-r75] n/a 1 1 /mmwr/preview/mmwrhtml/mm6124a3.htm all 1 pages (CSV)

Unique accessibility issues (axe + Alfa consolidated)

axe and Alfa both implement W3C ACT rules, so the same issue is often caught by both. These are deduplicated by ACT rule and page, so a shared finding counts once (7481 raw engine findings → 7239 unique).

Unique issues (rule × page)
7239
Caught by both engines
241 highest confidence
axe only
4582
Alfa only
2416
8 rule type(s) caught by both engines — highest confidence

Two independent ACT-rule implementations (Deque axe-core and Siteimprove Alfa) flagged the same issue on the same pages. Agreement between separate engines is strong evidence the barrier is real, not a single-tool false positive — the best place to start.

Rules flagged by both axe-core and Alfa in 2026-W38, by pages affected.
IssuePagesRule references
<html> element must have a lang attribute334axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Images must have alternative text330axe image-alt · Alfa sia-r2 · ACT 23a2a8
Links must have discernible text141axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels106axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty32axe empty-heading · Alfa sia-r64 · ACT ffd0e9
Table cell headers attributes must refer to other <th> elements in the same table13axe td-headers-attr · Alfa sia-r45 · ACT a25f45
Buttons must have discernible text10axe button-name · Alfa sia-r12 · ACT 97a4e1
lang attribute must have a valid value2axe valid-lang · Alfa sia-r7 · ACT de46e4