www.cdc.gov: Accessibility — week 2026-W24

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.

SC	Criterion	Pages	Rules
2.5.5	WCAG 2.5.5	301	1
1.4.6	WCAG 1.4.6	281	1
1.4.3	Contrast (Minimum)	242	2
1.1.1	Non-text Content (images, icons)	124	2
3.1.1	Language of Page	122	2

Bug reports

23 issue type(s) are shown by default out of 60 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 2 critical, 14 serious, 40 moderate, 4 minor. By WCAG category: 20 WCAG 2.0 A, 4 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 16 Best Practice, 13 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; 10 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.

Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 95/833 pages · 988 instances Likely template

Bug ID: VS-f7dedddb
Pattern ID: VS-9074b4dd
Combined ID: VS-f7dedddb (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)
Rule: axe-core — Images must have alternative text [image-alt]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
XPath / selector: img[height="8"][alt=" "][width="140"]
History: first seen 2026-W24, last seen 2026-W24 (1 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 95 of 833 scanned pages (988 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: img[height="8"][alt=" "][width="140"]
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 95 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

Triage status Notes

Serious axe html-has-lang WCAG 2.0 A <html> element must have a lang attribute (WCAG 3.1.1) 94/833 pages · 94 instances Likely template

Bug ID: VS-fed1d7fe
Pattern ID: VS-c126b6a6
Combined ID: VS-fed1d7fe (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)
Rule: axe-core — <html> element must have a lang attribute [html-has-lang]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
XPath / selector: html
History: first seen 2026-W24, last seen 2026-W24 (1 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 94 of 833 scanned pages (94 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: html
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 94 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

Triage status Notes

Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 91/833 pages · 183 instances Likely template

Bug ID: VS-f9509094
Pattern ID: VS-be8d563e
Combined ID: VS-f9509094 (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)
Rule: axe-core — Elements must meet minimum color contrast ratio thresholds [color-contrast]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: .wm-label
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<span class="wm-label" style="position: absolute; left: 3px; display: inline; cursor: text; color: rgb(204, 204, 204);">Choose a topic above</span>

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 91 of 833 scanned pages (183 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: .wm-label
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 91 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

Triage status Notes

Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 34/833 pages · 60 instances Likely template

Bug ID: VS-cfcf0f9f
Pattern ID: VS-e9fe47ac
Combined ID: VS-cfcf0f9f (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)
Rule: axe-core — Links must have discernible text [link-name]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
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-W24 (1 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 34 of 833 scanned pages (60 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
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 34 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

Triage status Notes

Critical axe label WCAG 2.0 A Form elements must have labels (WCAG 4.1.2) 13/833 pages · 19 instances Likely template

Bug ID: VS-436a55e9
Pattern ID: VS-fafffee0
Combined ID: VS-436a55e9 (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)
Rule: axe-core — Form elements must have labels [label]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: #Email
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<input type="text" class="email" id="Email" name="email" value="" onfocus="this.value=''">

Description

Form elements must have labels. Detected by axe-core rule label on 13 of 833 scanned pages (19 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: #Email
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

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

Triage status Notes

Serious axe link-in-text-block WCAG 2.0 A Links must be distinguishable without relying on color (WCAG 1.4.1) 9/833 pages · 20 instances

Bug ID: VS-0738f8ee
Pattern ID: VS-8ade3360
Combined ID: VS-0738f8ee (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)
Rule: axe-core — Links must be distinguishable without relying on color [link-in-text-block]
Example URL: https://www.cdc.gov/rss
XPath / selector: .mb-3.card > .card-body > p > a
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<a href="https://www.cdc.gov/cdc-info/forms/contact-us.html">Send us a message</a>

Description

Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 9 of 833 scanned pages (20 instances).

Steps to reproduce

Open https://www.cdc.gov/rss.
Locate the element: .mb-3.card > .card-body > p > a
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

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

Triage status Notes

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 7/833 pages · 7 instances

Bug ID: VS-9298892d
Pattern ID: VS-3f76c7ea
Combined ID: VS-9298892d (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)
Rule: axe-core — Frames must have an accessible name [frame-title]
Example URL: https://www.cdc.gov/about/cdc-moving-forward/newcdc-info.html
XPath / selector: iframe
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/9RnkRCCkSdc?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 833 scanned pages (7 instances).

Steps to reproduce

Open https://www.cdc.gov/about/cdc-moving-forward/newcdc-info.html.
Locate the element: iframe
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

Triage status Notes

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 5/833 pages · 5 instances

Bug ID: VS-251ab653
Pattern ID: VS-a0bdbdf6
Combined ID: VS-251ab653 (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)
Rule: axe-core — <ul> and <ol> must only directly contain <li>, <script> or <template> elements [list]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00001952.htm
XPath / selector: ol
History: first seen 2026-W24, last seen 2026-W24 (1 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 5 of 833 scanned pages (5 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001952.htm.
Locate the element: ol
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

Triage status Notes

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 1/833 pages · 4 instances Likely content

Bug ID: VS-57feb9e5
Pattern ID: VS-5c82bd60
Combined ID: VS-57feb9e5 (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)
Rule: axe-core — ARIA commands must have an accessible name [aria-command-name]
Example URL: https://www.cdc.gov/rocky-mountain-spotted-fever/hcp/data-research/index.html
XPath / selector: #dataTableSection__CaseFatalityRateofSpottedFeverRickettsiosisbyAgeGroup-2008-2013 > .table-container > table > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
History: first seen 2026-W24, last seen 2026-W24 (1 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 1 of 833 scanned pages (4 instances).

Steps to reproduce

Open https://www.cdc.gov/rocky-mountain-spotted-fever/hcp/data-research/index.html.
Locate the element: #dataTableSection__CaseFatalityRateofSpottedFeverRickettsiosisbyAgeGroup-2008-2013 > .table-container > table > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
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

/rocky-mountain-spotted-fever/hcp/data-research/index.html

Testing environment

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

Suggested fix

How to fix: Give the 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

Triage status Notes

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 1/833 pages · 3 instances Likely content

Bug ID: VS-b608c9b5
Pattern ID: VS-6175596b
Combined ID: VS-b608c9b5 (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)
Rule: axe-core — <li> elements must be contained in a <ul> or <ol> [listitem]
Example URL: https://www.cdc.gov/phleads/php/about
XPath / selector: .table-col[role="cell"][data-col="2"] > li:nth-child(2)
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<li>Increased effectiveness of leadership and data science training programs.</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 1 of 833 scanned pages (3 instances).

Steps to reproduce

Open https://www.cdc.gov/phleads/php/about.
Locate the element: .table-col[role="cell"][data-col="2"] > li:nth-child(2)
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

/phleads/php/about

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

Triage status Notes

Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 1/833 pages · 2 instances Likely content

Bug ID: VS-8d472d88
Pattern ID: VS-dd1c019f
Combined ID: VS-8d472d88 (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)
Rule: axe-core — lang attribute must have a valid value [valid-lang]
Example URL: https://www.cdc.gov/other/language-assistance.html
XPath / selector: .cdc-textblock > ul[lang="”ru\""]
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<ul lang="”ru"" xml:lang="”ru"">

Description

lang attribute must have a valid value. Detected by axe-core rule valid-lang on 1 of 833 scanned pages (2 instances).

Steps to reproduce

Open https://www.cdc.gov/other/language-assistance.html.
Locate the element: .cdc-textblock > ul[lang="”ru\""]
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

/other/language-assistance.html

Testing environment

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

Suggested fix

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

Triage status Notes

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 1/833 pages · 1 instances Likely content

Bug ID: VS-a6570acb
Pattern ID: VS-58301a87
Combined ID: VS-a6570acb (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)
Rule: axe-core — Interactive controls must not be nested [nested-interactive]
Example URL: https://www.cdc.gov/tobacco/campaign/tips/diseases/cancer.html
XPath / selector: #acc-header-2
History: first seen 2026-W24, last seen 2026-W24 (1 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 1 of 833 scanned pages (1 instances).

Steps to reproduce

Open https://www.cdc.gov/tobacco/campaign/tips/diseases/cancer.html.
Locate the element: #acc-header-2
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

/tobacco/campaign/tips/diseases/cancer.html

Testing environment

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

Suggested fix

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

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

Triage status Notes

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 1/833 pages · 1 instances Likely content

Bug ID: VS-5ad4b063
Pattern ID: VS-c613c153
Combined ID: VS-5ad4b063 (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)
Rule: axe-core — Scrollable region must have keyboard access [scrollable-region-focusable]
Example URL: https://www.cdc.gov/nors/reports/animal-contact-outbreaks-2017.html
XPath / selector: .cdc_page_element.dfe-block.dfe-block--cdcmodule:nth-child(31) > .dfe-block__inner > .cdc-textblock > .table-responsive > div
History: first seen 2026-W24, last seen 2026-W24 (1 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 1 of 833 scanned pages (1 instances).

Steps to reproduce

Open https://www.cdc.gov/nors/reports/animal-contact-outbreaks-2017.html.
Locate the element: .cdc_page_element.dfe-block.dfe-block--cdcmodule:nth-child(31) > .dfe-block__inner > .cdc-textblock > .table-responsive > div
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

/nors/reports/animal-contact-outbreaks-2017.html

Testing environment

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

Suggested fix

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

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

Triage status Notes

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 812/833 pages · 5552 instances Likely template

Bug ID: VS-d078b20d
Pattern ID: VS-f18df681
Combined ID: VS-d078b20d (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
Rule: axe-core — All page content should be contained by landmarks [region]
Example URL: https://www.cdc.gov/soccer/index.html
XPath / selector: .cdc-site-gov-notice
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

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

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 812 of 833 scanned pages (5552 instances).

Steps to reproduce

Open https://www.cdc.gov/soccer/index.html.
Locate the element: .cdc-site-gov-notice
Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 812 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

Triage status Notes

Serious axe label-title-only Best Practice Form elements should have a visible label (WCAG criterion undetermined) 15/833 pages · 15 instances Likely template

Bug ID: VS-486998ce
Pattern ID: VS-33841929
Combined ID: VS-486998ce (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
Rule: axe-core — Form elements should have a visible label [label-title-only]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/05_0076_zht.htm
XPath / selector: .smallfield
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<input class="smallfield" type="text" name="email" size="15" title="插入電子郵件" value="插入電子郵件" onfocus="this.value=''">

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 15 of 833 scanned pages (15 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/05_0076_zht.htm.
Locate the element: .smallfield
Confirm the axe-core finding for rule label-title-only.

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

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

Triage status Notes

Serious axe tabindex Best Practice Elements should not have tabindex greater than zero (WCAG criterion undetermined) 3/833 pages · 7 instances

Bug ID: VS-ec9f4f24
Pattern ID: VS-7430f84c
Combined ID: VS-ec9f4f24 (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
Rule: axe-core — Elements should not have tabindex greater than zero [tabindex]
Example URL: https://www.cdc.gov/
XPath / selector: a[href$="#content"]
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

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

Description

Elements should not have tabindex greater than zero. Detected by axe-core rule tabindex on 3 of 833 scanned pages (7 instances).

Steps to reproduce

Open https://www.cdc.gov/.
Locate the element: a[href$="#content"]
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

Triage status Notes

Moderate alfa sia-r69 WCAG 2.0 AA Text has sufficient color contrast (Enhanced) (WCAG 1.4.3) 151/833 pages · 823 instances · possible duplicate Likely template

Bug ID: VS-f5fd4be4
Pattern ID: VS-f7e99f4b
Combined ID: VS-f5fd4be4 (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)
Rule: Siteimprove Alfa — Text has sufficient color contrast (Enhanced) [sia-r69]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: text: "Related Pages"
History: first seen 2026-W24, last seen 2026-W24 (1 wk)
Possible duplicate: Same WCAG SC covered by axe report VS-f9509094 (pattern VS-be8d563e). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 151 of 833 scanned pages (823 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: text: "Related Pages"
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 151 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

Triage status Notes

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) 64/833 pages · 554 instances Likely template

Bug ID: VS-2b8ff38f
Pattern ID: VS-179ad9b3
Combined ID: VS-2b8ff38f (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)
Rule: Siteimprove Alfa — Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113]
Example URL: https://www.cdc.gov/diabetes/php/data-research/index-1.html
XPath / selector: <button class="btn btn-search search-submit search-button" type="button">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 64 of 833 scanned pages (554 instances).

Steps to reproduce

Open https://www.cdc.gov/diabetes/php/data-research/index-1.html.
Locate the element: <button class="btn btn-search search-submit search-button" type="button">
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 64 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

Triage status Notes

Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 46/833 pages · 614 instances Likely template

Bug ID: VS-fe113868
Pattern ID: VS-d6097011
Combined ID: VS-fe113868 (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)
Rule: Siteimprove Alfa — Presentational children of an element are not focusable [sia-r68]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: <ul style="Display:block" class="ulHide">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 46 of 833 scanned pages (614 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: <ul style="Display:block" class="ulHide">
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 46 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

Triage status Notes

Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 34/833 pages · 65 instances Likely template

Bug ID: VS-0c976fe4
Pattern ID: VS-f7dba940
Combined ID: VS-0c976fe4 (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)
Rule: Siteimprove Alfa — Accessible name of link or button matches visible label [sia-r14]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: <a href="/oeeo/index.html" class="cdc-footer__super-title" aria-label="Office of Equal Employment Opportunity">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 34 of 833 scanned pages (65 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: <a href="/oeeo/index.html" class="cdc-footer__super-title" aria-label="Office of Equal Employment Opportunity">
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 34 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

Triage status Notes

Moderate alfa sia-r2 WCAG 2.0 A Image has accessible name (WCAG 1.1.1) 29/833 pages · 318 instances Likely template

Bug ID: VS-08349140
Pattern ID: VS-a24eaa8c
Combined ID: VS-08349140 (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)
Rule: Siteimprove Alfa — Image has accessible name [sia-r2]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm
XPath / selector: <img src="../../images/spacer.gif" width="10" height="1" alt=" ">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 29 of 833 scanned pages (318 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm.
Locate the element: <img src="../../images/spacer.gif" width="10" height="1" alt=" ">
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 29 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

Triage status Notes

Moderate alfa sia-r4 WCAG 2.0 A Document has a valid lang attribute (WCAG 3.1.1) 28/833 pages · 28 instances Likely template

Bug ID: VS-4c129392
Pattern ID: VS-7a0e5645
Combined ID: VS-4c129392 (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)
Rule: Siteimprove Alfa — Document has a valid lang attribute [sia-r4]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm
XPath / selector: <html>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 28 of 833 scanned pages (28 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm.
Locate the element: <html>
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 28 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

Triage status Notes

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 11/833 pages · 19 instances Likely template

Bug ID: VS-f690cd9b
Pattern ID: VS-28ebd979
Combined ID: VS-f690cd9b (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)
Rule: Siteimprove Alfa — Link has accessible name [sia-r11]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/05_0075.htm
XPath / selector: <a href="http://www.cdc.gov/">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 11 of 833 scanned pages (19 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/05_0075.htm.
Locate the element: <a href="http://www.cdc.gov/">
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

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

Triage status Notes

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 360/833 pages · 371 instances Likely template

Bug ID: VS-48572422
Pattern ID: VS-8806389c
Combined ID: VS-48572422 (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
Rule: axe-core — Landmarks should have a unique role or role/label/title (i.e. accessible name) c [landmark-unique]
Example URL: https://www.cdc.gov/soccer/index.html
XPath / selector: .page-right-rail__static
History: first seen 2026-W24, last seen 2026-W24 (1 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 360 of 833 scanned pages (371 instances).

Steps to reproduce

Open https://www.cdc.gov/soccer/index.html.
Locate the element: .page-right-rail__static
Confirm the axe-core finding for rule landmark-unique.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 360 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

Triage status Notes

Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 301/833 pages · 11254 instances Likely template

Bug ID: VS-755ccf24
Pattern ID: VS-cb53cc4d
Combined ID: VS-755ccf24 (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)
Rule: Siteimprove Alfa — Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: <button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 301 of 833 scanned pages (11254 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: <button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
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 301 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

Triage status Notes

Moderate alfa sia-r66 WCAG 2.x AAA Text has enhanced contrast (WCAG 1.4.6) 281/833 pages · 11092 instances Likely template

Bug ID: VS-e21e263d
Pattern ID: VS-646b1e0b
Combined ID: VS-e21e263d (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)
Rule: Siteimprove Alfa — Text has enhanced contrast [sia-r66]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: text: " Here's how you know "
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 281 of 833 scanned pages (11092 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: text: " Here's how you know "
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 281 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

Triage status Notes

Moderate alfa sia-r57 Undetermined Scrolling content can be accessed by keyboard (WCAG criterion undetermined) 270/833 pages · 4689 instances Likely template

Bug ID: VS-24fb1454
Pattern ID: VS-c18be945
Combined ID: VS-24fb1454 (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
Rule: Siteimprove Alfa — Scrolling content can be accessed by keyboard [sia-r57]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: text: "Skip directly to search"
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 270 of 833 scanned pages (4689 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: text: "Skip directly to search"
Confirm the Siteimprove Alfa finding for rule sia-r57.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 270 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

Triage status Notes

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 226/833 pages · 245 instances Likely template

Bug ID: VS-bf68fc7c
Pattern ID: VS-e05344b9
Combined ID: VS-bf68fc7c (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
Rule: Siteimprove Alfa — aria attribute is permitted for element role [sia-r18]
Example URL: https://www.cdc.gov/oeeo/policies/index.html
XPath / selector: @aria-label="Official website of the United States government"
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 226 of 833 scanned pages (245 instances).

Steps to reproduce

Open https://www.cdc.gov/oeeo/policies/index.html.
Locate the element: @aria-label="Official website of the United States government"
Confirm the Siteimprove Alfa finding for rule sia-r18.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 226 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

Triage status Notes

Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 134/833 pages · 182 instances Likely template

Bug ID: VS-f7363d73
Pattern ID: VS-d25f622d
Combined ID: VS-f7363d73 (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
Rule: axe-core — Heading levels should only increase by one [heading-order]
Example URL: https://www.cdc.gov/pcd/issues/2019/2019_TOC.htm
XPath / selector: h3:nth-child(5)
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<h3><a id="December" class="onThisPageAnchor" title="December" name="December"></a>December</h3>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 134 of 833 scanned pages (182 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2019/2019_TOC.htm.
Locate the element: h3:nth-child(5)
Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 134 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

Triage status Notes

Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 126/833 pages · 13351 instances Likely template

Bug ID: VS-210a0968
Pattern ID: VS-04a9d28c
Combined ID: VS-210a0968 (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]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
XPath / selector: body
History: first seen 2026-W24, last seen 2026-W24 (1 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" background="../../../images/bkgnd.gif" class=" dmat-load-complete">

<!--webbot bot="Include" U-Include="../../../

Description

Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 126 of 833 scanned pages (13351 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: body
Confirm the deprecated-html finding for rule presentational-attr.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 126 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.

Triage status Notes

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 105/833 pages · 105 instances Likely template

Bug ID: VS-7123642c
Pattern ID: VS-d5d82446
Combined ID: VS-7123642c (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
Rule: axe-core — Document should have one main landmark [landmark-one-main]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
XPath / selector: html
History: first seen 2026-W24, last seen 2026-W24 (1 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 105 of 833 scanned pages (105 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: html
Confirm the axe-core finding for rule landmark-one-main.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 105 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

Triage status Notes

Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 93/833 pages · 93 instances Likely template

Bug ID: VS-da9f128a
Pattern ID: VS-fa44f293
Combined ID: VS-da9f128a (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
Rule: axe-core — Page should contain a level-one heading [page-has-heading-one]
Example URL: https://www.cdc.gov/yellow-fever/index.html
XPath / selector: html
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

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

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 93 of 833 scanned pages (93 instances).

Steps to reproduce

Open https://www.cdc.gov/yellow-fever/index.html.
Locate the element: html
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 93 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

Triage status Notes

Moderate deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 79/833 pages · 623 instances Likely template

Bug ID: VS-f4bb4e1e
Pattern ID: VS-91d2294a
Combined ID: VS-f4bb4e1e (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]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00050021.htm
XPath / selector: font
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

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

Description

Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 79 of 833 scanned pages (623 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050021.htm.
Locate the element: font
Confirm the deprecated-html finding for rule font-element.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 79 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.

Triage status Notes

Moderate deprecated-html big-element Undetermined Obsolete <big> element (use CSS) (WCAG criterion undetermined) 69/833 pages · 94 instances Likely template

Bug ID: VS-edaf68d9
Pattern ID: VS-7845739d
Combined ID: VS-edaf68d9 (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]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00050021.htm
XPath / selector: big
History: first seen 2026-W24, last seen 2026-W24 (1 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 69 of 833 scanned pages (94 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050021.htm.
Locate the element: big
Confirm the deprecated-html finding for rule big-element.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 69 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.

Triage status Notes

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 63/833 pages · 1254 instances Likely template

Bug ID: VS-3da036c2
Pattern ID: VS-fbf54eba
Combined ID: VS-3da036c2 (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)
Rule: Siteimprove Alfa — Link is distinguishable without relying on color [sia-r74]
Example URL: https://www.cdc.gov/
XPath / selector: <p>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 63 of 833 scanned pages (1254 instances).

Steps to reproduce

Open https://www.cdc.gov/.
Locate the element: <p>
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 63 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

Triage status Notes

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 46/833 pages · 2446 instances Likely template

Bug ID: VS-bcf39bc5
Pattern ID: VS-2208081b
Combined ID: VS-bcf39bc5 (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)
Rule: Siteimprove Alfa — Text has minimum contrast ratio of 4.5:1 [sia-r73]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: <p>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 46 of 833 scanned pages (2446 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: <p>
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 46 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

Triage status Notes

Moderate alfa sia-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 43/833 pages · 62 instances Likely template

Bug ID: VS-9e29d566
Pattern ID: VS-f054f4a4
Combined ID: VS-9e29d566 (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
Rule: Siteimprove Alfa — Headings are structured hierarchically [sia-r53]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: <h3>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 43 of 833 scanned pages (62 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: <h3>
Confirm the Siteimprove Alfa finding for rule sia-r53.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 43 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

Triage status Notes

Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 41/833 pages · 41 instances Likely template

Bug ID: VS-896d739e
Pattern ID: VS-7118fead
Combined ID: VS-896d739e (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
Rule: Siteimprove Alfa — Form field label is visible [sia-r61]
Example URL: https://www.cdc.gov/
XPath / selector: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 41 of 833 scanned pages (41 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 41 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

Triage status Notes

Moderate alfa sia-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 29/833 pages · 29 instances Likely template

Bug ID: VS-2ef8b99d
Pattern ID: VS-3d033717
Combined ID: VS-2ef8b99d (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
Rule: Siteimprove Alfa — No obsolete or deprecated elements are used [sia-r70]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm
XPath / selector: {"type":"document","children":[{"type":"element","children":[{"type":"element","
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 29 of 833 scanned pages (29 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00014786.htm.
Locate the element: {"type":"document","children":[{"type":"element","children":[{"type":"element","
Confirm the Siteimprove Alfa finding for rule sia-r70.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 29 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

Triage status Notes

Moderate deprecated-html center-element Undetermined Obsolete <center> element (use CSS) (WCAG criterion undetermined) 25/833 pages · 50 instances Likely template

Bug ID: VS-48a4af2b
Pattern ID: VS-20060f39
Combined ID: VS-48a4af2b (pattern VS-20060f39) — 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 <center> element (use CSS) [center-element]
Example URL: https://www.cdc.gov/pcd/issues/2005/nov/cover.htm
XPath / selector: center
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

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

Description

Obsolete <center> element (use CSS). Detected by deprecated-html rule center-element on 25 of 833 scanned pages (50 instances).

Steps to reproduce

Open https://www.cdc.gov/pcd/issues/2005/nov/cover.htm.
Locate the element: center
Confirm the deprecated-html finding for rule center-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.

Triage status Notes

Moderate alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 10/833 pages · 28 instances Likely template

Bug ID: VS-b3595700
Pattern ID: VS-2cd767ca
Combined ID: VS-b3595700 (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
Rule: Siteimprove Alfa — Table header has scope [sia-r78]
Example URL: https://www.cdc.gov/rss
XPath / selector: <h6>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 10 of 833 scanned pages (28 instances).

Steps to reproduce

Open https://www.cdc.gov/rss.
Locate the element: <h6>
Confirm the Siteimprove Alfa finding for rule sia-r78.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

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

Triage status Notes

Moderate alfa sia-r60 Undetermined Input purpose can be determined (WCAG criterion undetermined) 6/833 pages · 11 instances

Bug ID: VS-43c1d6a3
Pattern ID: VS-3fb891c5
Combined ID: VS-43c1d6a3 (pattern VS-3fb891c5) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category: Undetermined
Obligation: unmapped
Handling: review
WCAG SC: undetermined
Rule: Siteimprove Alfa — Input purpose can be determined [sia-r60]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: <fieldset>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Input purpose can be determined. Detected by Siteimprove Alfa rule sia-r60 on 6 of 833 scanned pages (11 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: <fieldset>
Confirm the Siteimprove Alfa finding for rule sia-r60.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Triage status Notes

Minor axe empty-table-header Best Practice Table header text should not be empty (WCAG criterion undetermined) 6/833 pages · 15 instances

Bug ID: VS-afb72d0e
Pattern ID: VS-d69fc059
Combined ID: VS-afb72d0e (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
Rule: axe-core — Table header text should not be empty [empty-table-header]
Example URL: https://www.cdc.gov/nors/reports/animal-contact-outbreaks-2017.html
XPath / selector: .cdc_page_element.dfe-block.dfe-block--cdcmodule:nth-child(27) > .dfe-block__inner > .cdc-textblock > .table-responsive > div > .table-bordered.table-hover > .main\|primary > tr:nth-child(1) > th[scope="col"]:nth-child(1)
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<th scope="col"></th>

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 6 of 833 scanned pages (15 instances).

Steps to reproduce

Open https://www.cdc.gov/nors/reports/animal-contact-outbreaks-2017.html.
Locate the element: .cdc_page_element.dfe-block.dfe-block--cdcmodule:nth-child(27) > .dfe-block__inner > .cdc-textblock > .table-responsive > div > .table-bordered.table-hover > .main\|primary > tr:nth-child(1) > th[scope="col"]:nth-child(1)
Confirm the axe-core finding for rule empty-table-header.

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

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

Triage status Notes

Moderate alfa sia-r80 WCAG 2.x AAA Scrollable element is keyboard accessible (WCAG 1.4.8) 5/833 pages · 182 instances

Bug ID: VS-df9eee27
Pattern ID: VS-388b5438
Combined ID: VS-df9eee27 (pattern VS-388b5438) — 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)
Rule: Siteimprove Alfa — Scrollable element is keyboard accessible [sia-r80]
Example URL: https://www.cdc.gov/
XPath / selector: <p>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Scrollable element is keyboard accessible. Detected by Siteimprove Alfa rule sia-r80 on 5 of 833 scanned pages (182 instances).

Steps to reproduce

Open https://www.cdc.gov/.
Locate the element: <p>
Confirm the Siteimprove Alfa finding for rule sia-r80 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Triage status Notes

Moderate alfa sia-r79 Undetermined Duplicate role landmark is labeled (WCAG criterion undetermined) 4/833 pages · 6 instances

Bug ID: VS-68ab14d0
Pattern ID: VS-f2542d87
Combined ID: VS-68ab14d0 (pattern VS-f2542d87) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category: Undetermined
Obligation: unmapped
Handling: review
WCAG SC: undetermined
Rule: Siteimprove Alfa — Duplicate role landmark is labeled [sia-r79]
Example URL: https://www.cdc.gov/mmwr/preview/mmwrhtml/00045974.htm
XPath / selector: <pre>
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Duplicate role landmark is labeled. Detected by Siteimprove Alfa rule sia-r79 on 4 of 833 scanned pages (6 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00045974.htm.
Locate the element: <pre>
Confirm the Siteimprove Alfa finding for rule sia-r79.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Triage status Notes

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 4/833 pages · 5 instances

Bug ID: VS-7a22775a
Pattern ID: VS-a48e6078
Combined ID: VS-7a22775a (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)
Rule: Siteimprove Alfa — Form field has accessible name [sia-r8]
Example URL: https://www.cdc.gov/mmwr/preview/index94.html
XPath / selector: <input type="text" class="email" id="Email" name="email">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 4 of 833 scanned pages (5 instances).

Steps to reproduce

Open https://www.cdc.gov/mmwr/preview/index94.html.
Locate the element: <input type="text" class="email" id="Email" name="email">
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

Triage status Notes

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 3/833 pages · 5 instances

Bug ID: VS-a99b486a
Pattern ID: VS-4fac2f41
Combined ID: VS-a99b486a (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
Rule: axe-core — ARIA role should be appropriate for the element [aria-allowed-role]
Example URL: https://www.cdc.gov/salmonella/outbreaks/moringa-05-26/index.html
XPath / selector: img[alt="Mogo moringa"]
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<img src="/salmonella/media/images/2026/05/MOGO-brand-Pure-Moringa-Oleifera.png" alt="Mogo moringa" role="presentation">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 3 of 833 scanned pages (5 instances).

Steps to reproduce

Open https://www.cdc.gov/salmonella/outbreaks/moringa-05-26/index.html.
Locate the element: img[alt="Mogo moringa"]
Confirm the axe-core finding for rule aria-allowed-role.

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: 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

Triage status Notes

Moderate alfa sia-r40 Undetermined Tables are used for tabular data, not layout (WCAG criterion undetermined) 2/833 pages · 3 instances Likely content

Bug ID: VS-3ded51e4
Pattern ID: VS-3d3b2245
Combined ID: VS-3ded51e4 (pattern VS-3d3b2245) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category: Undetermined
Obligation: unmapped
Handling: review
WCAG SC: undetermined
Rule: Siteimprove Alfa — Tables are used for tabular data, not layout [sia-r40]
Example URL: https://www.cdc.gov/tourette-syndrome/about/index.html
XPath / selector: <div class="cdc-slider cdc-slider--layout-small" id="DFESlider4eUYVlU2vJ" data-loop="true" data-responsive="{"0":"1","991":"2.34"}">
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

Description

Tables are used for tabular data, not layout. Detected by Siteimprove Alfa rule sia-r40 on 2 of 833 scanned pages (3 instances).

Steps to reproduce

Open https://www.cdc.gov/tourette-syndrome/about/index.html.
Locate the element: <div class="cdc-slider cdc-slider--layout-small" id="DFESlider4eUYVlU2vJ" data-loop="true" data-responsive="{"0":"1","991":"2.34"}">
Confirm the Siteimprove Alfa finding for rule sia-r40.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Triage status Notes

Moderate axe landmark-contentinfo-is-top-level Best Practice Contentinfo landmark should not be contained in another landmark (WCAG criterion undetermined) 2/833 pages · 2 instances Likely content

Bug ID: VS-317b50cc
Pattern ID: VS-424cced9
Combined ID: VS-317b50cc (pattern VS-424cced9) — 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
Rule: axe-core — Contentinfo landmark should not be contained in another landmark [landmark-contentinfo-is-top-level]
Example URL: https://www.cdc.gov/
XPath / selector: .cdc-footer > footer
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<footer>

Description

Contentinfo landmark should not be contained in another landmark. Detected by axe-core rule landmark-contentinfo-is-top-level on 2 of 833 scanned pages (2 instances).

Steps to reproduce

Open https://www.cdc.gov/.
Locate the element: .cdc-footer > footer
Confirm the axe-core finding for rule landmark-contentinfo-is-top-level.

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

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

Triage status Notes

Moderate axe landmark-no-duplicate-banner Best Practice Document should not have more than one banner landmark (WCAG criterion undetermined) 2/833 pages · 2 instances Likely content

Bug ID: VS-f967233f
Pattern ID: VS-054101da
Combined ID: VS-f967233f (pattern VS-054101da) — 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
Rule: axe-core — Document should not have more than one banner landmark [landmark-no-duplicate-banner]
Example URL: https://www.cdc.gov/
XPath / selector: .cdc-header
History: first seen 2026-W24, last seen 2026-W24 (1 wk)

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

<header class="container cdc-header">

Description

Document should not have more than one banner landmark. Detected by axe-core rule landmark-no-duplicate-banner on 2 of 833 scanned pages (2 instances).

Steps to reproduce

Open https://www.cdc.gov/.
Locate the element: .cdc-header
Confirm the axe-core finding for rule landmark-no-duplicate-banner.

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: Use only one banner landmark (<header> at the top level) per page.

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

Triage status Notes

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

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

Severity	Finding	WCAG category	Pages
Moderate	Document should not have more than one contentinfo landmark (WCAG criterion undetermined) [landmark-no-duplicate-contentinfo]	Best Practice	2
Moderate	The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link]	Best Practice	2
Minor	Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt]	Best Practice	2
Moderate	Table cell has header (WCAG 1.3.1) [sia-r77]	WCAG 2.0 A	1
Moderate	scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid]	Best Practice	1
Moderate	Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62]	WCAG 2.0 A	1
Moderate	Element with lang attribute has correct language (WCAG 3.1.2) [sia-r7]	WCAG 2.0 AA	1
Moderate	Component with same name serves same purpose (WCAG 4.1.2) [sia-r90]	WCAG 2.0 A	1
Moderate	Element has required owned roles (WCAG 1.3.1) [sia-r64]	WCAG 2.0 A	1
Minor	Headings should not be empty (WCAG criterion undetermined) [empty-heading]	Best Practice	1

Deque axe-core findings

Rule-level axe-core summary (29 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-W24, by pages affected
Rule	Impact	Pages affected	Instances	Example pages	All affected
All page content should be contained by landmarks [region]	moderate	812	5552	/soccer/index.html /oeeo/policies/index.html /healthy-pets/emergency-preparedness/index.html	all 812 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique]	moderate	360	371	/soccer/index.html /healthy-pets/emergency-preparedness/index.html /nors	all 360 pages (CSV)
Heading levels should only increase by one [heading-order]	moderate	134	182	/pcd/issues/2019/2019_TOC.htm /mmwr/volumes/75/wr/mm7509a1.htm /mmwr/preview/index94.html	all 134 pages (CSV)
Document should have one main landmark [landmark-one-main]	moderate	105	105	/pcd/issues/2005/nov/cover.htm /mmwr/preview/index94.html /mmwr/preview/mmwrhtml/00050021.htm	all 105 pages (CSV)
Images must have alternative text [image-alt]	critical	95	988	/pcd/issues/2005/nov/cover.htm /mmwr/preview/mmwrhtml/00050021.htm /mmwr/preview/mmwrhtml/00001276.htm	all 95 pages (CSV)
<html> element must have a lang attribute [html-has-lang]	serious	94	94	/pcd/issues/2005/nov/cover.htm /mmwr/preview/mmwrhtml/00050021.htm /mmwr/preview/mmwrhtml/00001276.htm	all 94 pages (CSV)
Page should contain a level-one heading [page-has-heading-one]	moderate	93	93	/yellow-fever/index.html / /family-health-history/index.html	all 93 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast]	serious	91	183	/mmwr/preview/index94.html /mmwr/preview/mmwrhtml/00050021.htm /mmwr/preview/mmwrhtml/00001276.htm	all 91 pages (CSV)
Links must have discernible text [link-name]	serious	34	60	/pcd/issues/2005/nov/cover.htm /zika/php/transmission/index.html /pcd/issues/2005/nov/05_0076_zht.htm	all 34 pages (CSV)
Form elements should have a visible label [label-title-only]	serious	15	15	/pcd/issues/2005/nov/05_0076_zht.htm /pcd/issues/2005/nov/05_0075.htm /pcd/issues/2008/oct/07_0164.htm	all 15 pages (CSV)
Form elements must have labels [label]	critical	13	19	/mmwr/preview/index94.html /places/communication-resources/index.html /mmwr/preview/ind2003_su.html	all 13 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block]	serious	9	20	/rss /malaria/php/surveillance/communication.html /infection-control/hcp/isolation-precautions/appendix-a-type-duration.html	all 9 pages (CSV)
Frames must have an accessible name [frame-title]	serious	7	7	/about/cdc-moving-forward/newcdc-info.html /cancer-survivors/patients/clinical-trials.html /radon/features/jackie-story.html	all 7 pages (CSV)
Table header text should not be empty [empty-table-header]	minor	6	15	/nors/reports/animal-contact-outbreaks-2017.html /pcd/issues/2006/oct/05_0185.htm /measles/data-research	all 6 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list]	serious	5	5	/mmwr/preview/mmwrhtml/00001952.htm /mmwr/preview/mmwrhtml/00001887.htm /mmwr/preview/mmwrhtml/00001928.htm	all 5 pages (CSV)
Elements should not have tabindex greater than zero [tabindex]	serious	3	7	/ /spanish /niosh/pubs/default.html	all 3 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role]	minor	3	5	/salmonella/outbreaks/moringa-05-26/index.html /vitalsigns/prevent-suicide/index.html /listeria/outbreaks/soft-cheese-06-26/investigation.html	all 3 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt]	minor	2	8	/spanish /nchs/hus	all 2 pages (CSV)
Contentinfo landmark should not be contained in another landmark [landmark-contentinfo-is-top-level]	moderate	2	2	/ /spanish	all 2 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner]	moderate	2	2	/ /spanish	all 2 pages (CSV)
Document should not have more than one contentinfo landmark [landmark-no-duplicate-contentinfo]	moderate	2	2	/ /spanish	all 2 pages (CSV)
The skip-link target should exist and be focusable [skip-link]	moderate	2	2	/ /spanish	all 2 pages (CSV)
scope attribute should be used correctly [scope-attr-valid]	moderate	1	14	/pcd/issues/2019/18_0498.htm	all 1 pages (CSV)
ARIA commands must have an accessible name [aria-command-name]	serious	1	4	/rocky-mountain-spotted-fever/hcp/data-research/index.html	all 1 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem]	serious	1	3	/phleads/php/about	all 1 pages (CSV)
lang attribute must have a valid value [valid-lang]	serious	1	2	/other/language-assistance.html	all 1 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable]	serious	1	1	/nors/reports/animal-contact-outbreaks-2017.html	all 1 pages (CSV)
Headings should not be empty [empty-heading]	minor	1	1	/pcd/issues/2025/2025_TOC.htm	all 1 pages (CSV)
Interactive controls must not be nested [nested-interactive]	serious	1	1	/tobacco/campaign/tips/diseases/cancer.html	all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (27 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-W24, by pages affected
Rule	Impact	Pages affected	Instances	Example pages	All affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111]	n/a	301	11254	/oeeo/policies/index.html /creutzfeldt-jakob/about/index.html /continuing-education/php/types-of-ce/index.html	all 301 pages (CSV)
Text has enhanced contrast [sia-r66]	n/a	281	11092	/oeeo/policies/index.html /creutzfeldt-jakob/about/index.html /continuing-education/php/types-of-ce/index.html	all 281 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57]	n/a	270	4689	/oeeo/policies/index.html /creutzfeldt-jakob/about/index.html /continuing-education/php/types-of-ce/index.html	all 270 pages (CSV)
aria attribute is permitted for element role [sia-r18]	n/a	226	245	/oeeo/policies/index.html /creutzfeldt-jakob/about/index.html /continuing-education/php/types-of-ce/index.html	all 226 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69]	n/a	151	823	/oeeo/policies/index.html /continuing-education/php/types-of-ce/index.html /pef/php/about/index.html	all 151 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113]	n/a	64	554	/diabetes/php/data-research/index-1.html /mmwr/preview/index94.html /other/nondiscrimination.html	all 64 pages (CSV)
Link is distinguishable without relying on color [sia-r74]	n/a	63	1254	/ /foia /mmwr/preview/mmwrhtml/00014786.htm	all 63 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73]	n/a	46	2446	/mmwr/preview/index94.html /mmwr/preview/mmwrhtml/00014786.htm /pcd/issues/2005/nov/05_0075.htm	all 46 pages (CSV)
Presentational children of an element are not focusable [sia-r68]	n/a	46	614	/mmwr/preview/index94.html /dengue/prevention /about/cdc-moving-forward/newcdc-info.html	all 46 pages (CSV)
Headings are structured hierarchically [sia-r53]	n/a	43	62	/mmwr/preview/index94.html /pcd/issues/2005/nov/05_0075.htm /spanish/acercacdc/director.html	all 43 pages (CSV)
Form field label is visible [sia-r61]	n/a	41	41	/ /healthy-aging-data/index.html /foia	all 41 pages (CSV)
Accessible name of link or button matches visible label [sia-r14]	n/a	34	65	/oeeo/policies/index.html /creutzfeldt-jakob/about/index.html /about/leadership/index.html	all 34 pages (CSV)
Image has accessible name [sia-r2]	n/a	29	318	/mmwr/preview/mmwrhtml/00014786.htm /pcd/issues/2005/nov/05_0075.htm /mmwr/preview/mmwrhtml/00033013.htm	all 29 pages (CSV)
No obsolete or deprecated elements are used [sia-r70]	n/a	29	29	/mmwr/preview/mmwrhtml/00014786.htm /pcd/issues/2005/nov/05_0075.htm /mmwr/preview/mmwrhtml/00033013.htm	all 29 pages (CSV)
Document has a valid lang attribute [sia-r4]	n/a	28	28	/mmwr/preview/mmwrhtml/00014786.htm /pcd/issues/2005/nov/05_0075.htm /mmwr/preview/mmwrhtml/00033013.htm	all 28 pages (CSV)
Link has accessible name [sia-r11]	n/a	11	19	/pcd/issues/2005/nov/05_0075.htm /mmwr/volumes/66/wr/mm6620a5.htm /lyme/about/index.html	all 11 pages (CSV)
Table header has scope [sia-r78]	n/a	10	28	/rss /mmwr/volumes/66/wr/mm6620a5.htm /global-measles-vaccination/site.html	all 10 pages (CSV)
Input purpose can be determined [sia-r60]	n/a	6	11	/mmwr/preview/index94.html /niosh/ppe/about/contact.html /other/accessibility.html	all 6 pages (CSV)
Scrollable element is keyboard accessible [sia-r80]	n/a	5	182	/ /pcd/issues/2023/2023_TOC.htm /spanish	all 5 pages (CSV)
Duplicate role landmark is labeled [sia-r79]	n/a	4	6	/mmwr/preview/mmwrhtml/00045974.htm /mmwr/preview/mmwrhtml/00046330.htm /mmwr/preview/mmwrhtml/00030693.htm	all 4 pages (CSV)
Form field has accessible name [sia-r8]	n/a	4	5	/mmwr/preview/index94.html /overdose-prevention/data-research/facts-stats/dose-dashboard-nonfatal-discharge-data.html /mmwr/preview/index86.html	all 4 pages (CSV)
Tables are used for tabular data, not layout [sia-r40]	n/a	2	3	/tourette-syndrome/about/index.html /measles/data-research	all 2 pages (CSV)
Table cell has header [sia-r77]	n/a	1	17	/measles/data-research	all 1 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62]	n/a	1	13	/rss	all 1 pages (CSV)
Element with lang attribute has correct language [sia-r7]	n/a	1	2	/other/language-assistance.html	all 1 pages (CSV)
Component with same name serves same purpose [sia-r90]	n/a	1	1	/measles/data-research	all 1 pages (CSV)
Element has required owned roles [sia-r64]	n/a	1	1	/pcd/issues/2025/2025_TOC.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 (3595 raw engine findings → 3521 unique).

Unique issues (rule × page): 3521
Caught by both engines: 74 highest confidence
axe only: 1822
Alfa only: 1625

6 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-W24, by pages affected.
Issue	Pages	Rule references
Images must have alternative text	95	axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute	94	axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Links must have discernible text	34	axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels	13	axe label · Alfa sia-r8 · ACT e086e5
lang attribute must have a valid value	1	axe valid-lang · Alfa sia-r7 · ACT de46e4
Headings should not be empty	1	axe empty-heading · Alfa sia-r64 · ACT ffd0e9