vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W29

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

Training priorities

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

SCCriterionPagesRulesNotes
2.5.5 WCAG 2.5.5 1495 1
1.4.6 WCAG 1.4.6 1263 1
1.4.3 Contrast (Minimum) 1176 2
1.4.8 WCAG 1.4.8 1069 3
1.1.1 Non-text Content (images, icons) 919 2

Next 10 actions

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

Top 10 clustered component fixes for this week.
ClusterSeverityPagesWho it affectsHow to fixEvidenceDecision
<html> element must have a lang attribute · unattributed component
Fix one place, resolve ~595 finding(s) on 595 page(s).
XPath / selector: html
<html>
 Serious 595 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~281 finding(s) on 281 page(s).
XPath / selector: <html>
 Moderate 281 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~669 finding(s) on 669 page(s).
XPath / selector: html
<html>
 Moderate 669 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~136 finding(s) on 136 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="Insert e-mail" value="Insert e-mail" onfocus="this.value=''">
 Serious 136 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~189 finding(s) on 189 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--content">
 Moderate 189 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
No obsolete or deprecated elements are used · unattributed component
Fix one place, resolve ~218 finding(s) on 218 page(s).
XPath / selector: {"type":"document","children":[{"type":"element","children":[{"type":"element","
 Moderate 218 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~172 finding(s) on 172 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
 Moderate 172 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
aria attribute is permitted for element role · unattributed component
Fix one place, resolve ~696 finding(s) on 696 page(s).
XPath / selector: @aria-label="Official website of the United States government"
 Moderate 696 Requires manual testing. Only use ARIA states/properties that are allowed on this element/role. pages (CSV)
No obsolete or deprecated elements are used · unattributed component
Fix one place, resolve ~162 finding(s) on 162 page(s).
XPath / selector: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
 Moderate 162 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~465 finding(s) on 465 page(s).
XPath / selector: img[height="10"][alt=" "][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="1" height="10" alt=" " border="0">
 Critical 465 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)

Bug reports

40 issue type(s) are shown by default out of 86 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 8 critical, 20 serious, 53 moderate, 5 minor. By WCAG category: 40 WCAG 2.0 A, 2 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 18 Best Practice, 19 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; 36 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

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

Findings needing review

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

Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 720/3333 pages · 1085 instances Likely template
Bug ID
VS-3254ef35
Pattern ID
VS-be8d563e
Combined ID
VS-3254ef35 (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
font
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<font color="red">Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: <a href="mailto:mmwrq@cdc.gov">mmwrq@cdc.gov</a>

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 720 of 3333 scanned pages (1085 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6027a1.htm?s_cid=mm6027a1_w.
  2. Locate the element: font
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

Affects Limited vision (2.4%), Without color perception (4.5%).

  • Limited vision — 2.4% of population
  • Without color perception — 4.5% of population

Affected pages

…and more — all 720 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

Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 622/3333 pages · 6181 instances Likely template
Bug ID
VS-2981e623
Pattern ID
VS-9074b4dd
Combined ID
VS-2981e623 (pattern VS-9074b4dd) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">

Description

Images must have alternative text. Detected by axe-core rule image-alt on 622 of 3333 scanned pages (6181 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
  3. Confirm the axe-core finding for rule image-alt against WCAG 1.1.1 Non-text Content.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 622 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe html-has-lang WCAG 2.0 A <html> element must have a lang attribute (WCAG 3.1.1) 595/3333 pages · 595 instances Likely template
Bug ID
VS-cd3314a7
Pattern ID
VS-c126b6a6
Combined ID
VS-cd3314a7 (pattern VS-c126b6a6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
3.1.1 Language of Page (Level A, WCAG 2.0)
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W29 (6 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 595 of 3333 scanned pages (595 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule html-has-lang against WCAG 3.1.1 Language of Page.

Impact

Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 595 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

Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 196/3333 pages · 431 instances Likely template
Bug ID
VS-23239786
Pattern ID
VS-e9fe47ac
Combined ID
VS-23239786 (pattern VS-e9fe47ac) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
History
first seen 2026-W24, last seen 2026-W29 (6 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 196 of 3333 scanned pages (431 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2009/jan/07_0240.htm.
  2. Locate the element: table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
  3. Confirm the axe-core finding for rule link-name against WCAG 2.4.4 Link Purpose (In Context).

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 196 pages (CSV).

Testing environment

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

Suggested fix

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

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

Critical axe label WCAG 2.0 A Form elements must have labels (WCAG 4.1.2) 185/3333 pages · 190 instances Likely template
Bug ID
VS-0dd050a3
Pattern ID
VS-fafffee0
Combined ID
VS-0dd050a3 (pattern VS-fafffee0) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#searchBox
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

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

Description

Form elements must have labels. Detected by axe-core rule label on 185 of 3333 scanned pages (190 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6027a1.htm?s_cid=mm6027a1_w.
  2. Locate the element: #searchBox
  3. Confirm the axe-core finding for rule label against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

…and more — all 185 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe link-in-text-block WCAG 2.0 A Links must be distinguishable without relying on color (WCAG 1.4.1) 63/3333 pages · 70 instances Likely template
Bug ID
VS-97372806
Pattern ID
VS-8ade3360
Combined ID
VS-97372806 (pattern VS-8ade3360) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.4.1 Use of Color (Level A, WCAG 2.0)
XPath / selector
.all-pages
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

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

Description

Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 63 of 3333 scanned pages (70 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/early-care-education/php/success-stories/licensing.html.
  2. Locate the element: .all-pages
  3. Confirm the axe-core finding for rule link-in-text-block against WCAG 1.4.1 Use of Color.

Impact

Affects Without color perception (4.5%), Limited vision (2.4%).

  • Without color perception — 4.5% of population
  • Limited vision — 2.4% of population

Affected pages

…and more — all 63 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 39/3333 pages · 47 instances Likely template
Bug ID
VS-19c2f8f6
Pattern ID
VS-a0bdbdf6
Combined ID
VS-19c2f8f6 (pattern VS-a0bdbdf6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
ol[type="-"]:nth-child(22)
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<ol type="-">

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 39 of 3333 scanned pages (47 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00039349.htm.
  2. Locate the element: ol[type="-"]:nth-child(22)
  3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 39 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 <ul>/<ol> with only <li> children for lists; don't fake lists with <div>s.

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

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 22/3333 pages · 30 instances Likely template
Bug ID
VS-3800ad23
Pattern ID
VS-3f76c7ea
Combined ID
VS-3800ad23 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
iframe
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/zs6RqUIuEVU?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 22 of 3333 scanned pages (30 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/parenting-teens/tips-coaching-emotions/index.html.
  2. Locate the element: iframe
  3. Confirm the axe-core finding for rule frame-title against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 17/3333 pages · 25 instances Likely template
Bug ID
VS-07d4db71
Pattern ID
VS-58301a87
Combined ID
VS-07d4db71 (pattern VS-58301a87) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#accordion-1-collapse-1
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<div aria-labelledby="accordion-1-card-1" class="collapse d-print-block show " id="accordion-1-collapse-1" role="tab">

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 17 of 3333 scanned pages (25 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nvss/vsrr.htm.
  2. Locate the element: #accordion-1-collapse-1
  3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 15/3333 pages · 25 instances Likely template
Bug ID
VS-fc504a01
Pattern ID
VS-c613c153
Combined ID
VS-fc504a01 (pattern VS-c613c153) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.1.1 Keyboard (Level A, WCAG 2.0)
XPath / selector
table
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<table class="table table-bordered table-responsive opt-in">

Description

Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 15 of 3333 scanned pages (25 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/65/wr/mm6516a1.htm?s_cid=mm6516a1_w.
  2. Locate the element: table
  3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

Impact

Affects Without vision (1.0%), Limited manipulation/strength (13.0%), Limited reach (2.0%).

  • Without vision — 1.0% of population
  • Limited manipulation/strength — 13.0% of population
  • Limited reach — 2.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 12/3333 pages · 111 instances Likely template
Bug ID
VS-faa8d377
Pattern ID
VS-5c82bd60
Combined ID
VS-faa8d377 (pattern VS-5c82bd60) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
table[aria-rowcount="1"] > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W29 (6 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 12 of 3333 scanned pages (111 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/united-states-cancer-statistics/publications/prostate-cancer-stat-bite.html.
  2. Locate the element: table[aria-rowcount="1"] > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 8/3333 pages · 26 instances
Bug ID
VS-d084ed5c
Pattern ID
VS-fab92378
Combined ID
VS-d084ed5c (pattern VS-fab92378) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#year_group
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

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

<select id="year_group" class="filter_dropdowns" style="width:100%">

Description

Select element must have an accessible name. Detected by axe-core rule select-name on 8 of 3333 scanned pages (26 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/hus/contents2019.htm?search=%2CState.
  2. Locate the element: #year_group
  3. Confirm the axe-core finding for rule select-name against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe td-headers-attr WCAG 2.0 A Table cell headers attributes must refer to other <th> elements in the same tabl (WCAG 1.3.1) 5/3333 pages · 20 instances
Bug ID
VS-9c57c426
Pattern ID
VS-07ba3b17
Combined ID
VS-9c57c426 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-responsive-md:nth-child(1) > div > table
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

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

<table class="table opt-in table-bordered table-striped text-center" style="width: 100%;">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 5 of 3333 scanned pages (20 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/immigrant-refugee-health/hcp/panel-physicians/vaccination.html.
  2. Locate the element: .table-responsive-md:nth-child(1) > div > table
  3. Confirm the axe-core finding for rule td-headers-attr against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 4/3333 pages · 5 instances
Bug ID
VS-441cf0f0
Pattern ID
VS-4b45acfe
Combined ID
VS-441cf0f0 (pattern VS-4b45acfe) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.2.2 Pause, Stop, Hide (Level A, WCAG 2.0)
XPath / selector
i > font[color="#FF0000"] > blink
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

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

<blink><big>Please note: </big>
</blink>

Description

<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 4 of 3333 scanned pages (5 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5208a1.htm.
  2. Locate the element: i > font[color="#FF0000"] > blink
  3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

Impact

Affects Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 3/3333 pages · 5 instances
Bug ID
VS-a5e73248
Pattern ID
VS-9429bb8d
Combined ID
VS-a5e73248 (pattern VS-9429bb8d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
#indicators
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

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

<div id="indicators" role="listbox" aria-labelledby="indicatorsSelectHeader">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 3 of 3333 scanned pages (5 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nvss/vsrr/mortality-dashboard.htm.
  2. Locate the element: #indicators
  3. Confirm the axe-core finding for rule aria-required-children against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 3/3333 pages · 137 instances
Bug ID
VS-b80c991e
Pattern ID
VS-6175596b
Combined ID
VS-b80c991e (pattern VS-6175596b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-col[data-col="2"][role="cell"] > li:nth-child(1)
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<li>Not
     release its contents except when the dispenser is activated, either
     manually or automatically by touch-free activation.</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 3 of 3333 scanned pages (137 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: .table-col[data-col="2"][role="cell"] > li:nth-child(1)
  3. Confirm the axe-core finding for rule listitem against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe document-title WCAG 2.0 A Documents must have <title> element to aid in navigation (WCAG 2.4.2) 3/3333 pages · 3 instances
Bug ID
VS-bd37b500
Pattern ID
VS-c80d5faa
Combined ID
VS-bd37b500 (pattern VS-c80d5faa) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.2 Page Titled (Level A, WCAG 2.0)
XPath / selector
#js
History
first seen 2026-W25, last seen 2026-W29 (3 wk)

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

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">

Description

Documents must have <title> element to aid in navigation. Detected by axe-core rule document-title on 3 of 3333 scanned pages (3 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5906md.htm.
  2. Locate the element: #js
  3. Confirm the axe-core finding for rule document-title against WCAG 2.4.2 Page Titled.

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: Give the page a unique, descriptive <title>.

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

Critical axe button-name WCAG 2.0 A Buttons must have discernible text (WCAG 4.1.2) 2/3333 pages · 2 instances Likely content
Bug ID
VS-e00ab755
Pattern ID
VS-e7298c00
Combined ID
VS-e00ab755 (pattern VS-e7298c00) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
button[aria-controls="accordion-panel-FfdOkDOG90"]
History
first seen 2026-W26, last seen 2026-W29 (3 wk)

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

<button aria-controls="accordion-panel-FfdOkDOG90" aria-expanded="false" class="accordion-button collapsed" data-bs-target="#accordion-panel-FfdOkDOG90" data-bs-toggle="collapse" type="button">

Description

Buttons must have discernible text. Detected by axe-core rule button-name on 2 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/lead-prevention/communication-resources/index.html.
  2. Locate the element: button[aria-controls="accordion-panel-FfdOkDOG90"]
  3. Confirm the axe-core finding for rule button-name against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-prohibited-attr WCAG 2.0 A Elements must only use permitted ARIA attributes (WCAG 4.1.2) 2/3333 pages · 2 instances Likely content
Bug ID
VS-471fdc7c
Pattern ID
VS-ebb1c464
Combined ID
VS-471fdc7c (pattern VS-ebb1c464) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#scan-result-1-icon
History
first seen 2026-W28, last seen 2026-W29 (2 wk)

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

<forge-icon id="scan-result-1-icon" name="shield_check_outline" aria-labelledby="scan-result-1-tooltip"></forge-icon>

Description

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

Steps to reproduce

  1. Open https://www.cdc.gov/niosh/data/datasets/rd-1081-2024-0/default.html.
  2. Locate the element: #scan-result-1-icon
  3. Confirm the axe-core finding for rule aria-prohibited-attr against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Critical axe aria-required-parent WCAG 2.0 A Certain ARIA roles must be contained by particular parents (WCAG 1.3.1) 1/3333 pages · 5 instances Likely content
Bug ID
VS-50cfc386
Pattern ID
VS-f6d344d5
Combined ID
VS-50cfc386 (pattern VS-f6d344d5) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-col[data-col="1"][role="cell"] > div[role="row"]
History
first seen 2026-W29, last seen 2026-W29 (1 wk)

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

<div role="row">U.S. MEC 1
</div>

Description

Certain ARIA roles must be contained by particular parents. Detected by axe-core rule aria-required-parent on 1 of 3333 scanned pages (5 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/contraception/hcp/usmec/intrauterine-devices.html.
  2. Locate the element: .table-col[data-col="1"][role="cell"] > div[role="row"]
  3. Confirm the axe-core finding for rule aria-required-parent 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: Place this ARIA role inside its required parent role (e.g. an option must be inside a listbox).

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

Critical axe aria-allowed-attr WCAG 2.0 A Elements must only use supported ARIA attributes (WCAG 4.1.2) 1/3333 pages · 3 instances Likely content
Bug ID
VS-9b15bf6f
Pattern ID
VS-1467ea8a
Combined ID
VS-9b15bf6f (pattern VS-1467ea8a) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#ageControl
History
first seen 2026-W25, last seen 2026-W29 (3 wk)

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

<label for="age" id="ageControl" class="hanging-indent" aria-label="age filter radio button" aria-haspopup="true" aria-controls="ageChecks" aria-expanded="false"><input id="age" type="radio" name="ind

Description

Elements must only use supported ARIA attributes. Detected by axe-core rule aria-allowed-attr on 1 of 3333 scanned pages (3 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nvss/vsrr/mortality-dashboard.htm.
  2. Locate the element: #ageControl
  3. Confirm the axe-core finding for rule aria-allowed-attr against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

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 ARIA attributes that aren't allowed on this role/element.

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

Critical axe aria-valid-attr-value WCAG 2.0 A ARIA attributes must conform to valid values (WCAG 4.1.2) 1/3333 pages · 2 instances Likely content
Bug ID
VS-0d3443de
Pattern ID
VS-af36d20c
Combined ID
VS-0d3443de (pattern VS-af36d20c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#TOPIC-AGE
History
first seen 2026-W29, last seen 2026-W29 (1 wk)

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

<input id="TOPIC-AGE" type="radio" name="TOPIC" value="Rates by Age" checked="" onclick="updateIndicators();" aria-controls="groups">

Description

ARIA attributes must conform to valid values. Detected by axe-core rule aria-valid-attr-value on 1 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/nchs/nvss/vsrr/infant-mortality-dashboard.htm.
  2. Locate the element: #TOPIC-AGE
  3. Confirm the axe-core finding for rule aria-valid-attr-value against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-input-field-name WCAG 2.0 A ARIA input fields must have an accessible name (WCAG 4.1.2) 1/3333 pages · 2 instances Likely content
Bug ID
VS-1723ff79
Pattern ID
VS-0841abc2
Combined ID
VS-1723ff79 (pattern VS-0841abc2) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
.rc-slider-handle-1
History
first seen 2026-W25, last seen 2026-W29 (3 wk)

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

<div tabindex="0" class="rc-slider-handle rc-slider-handle-1" role="slider" aria-valuemin="1" aria-valuemax="88" aria-valuenow="49" aria-disabled="false" style="left: 55.1724%; right: auto; transform:

Description

ARIA input fields must have an accessible name. Detected by axe-core rule aria-input-field-name on 1 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/overdose-prevention/data-research/facts-stats/dose-sys-accessible.html.
  2. Locate the element: .rc-slider-handle-1
  3. Confirm the axe-core finding for rule aria-input-field-name against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Serious axe aria-hidden-focus WCAG 2.0 A ARIA hidden element must not be focusable or contain focusable elements (WCAG 4.1.2) 1/3333 pages · 1 instances Likely content
Bug ID
VS-728a16e7
Pattern ID
VS-45146742
Combined ID
VS-728a16e7 (pattern VS-45146742) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#divIdleTimeout
History
first seen 2026-W29, last seen 2026-W29 (1 wk)

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

<div id="divIdleTimeout" class="modal fade background-and-border-none" style="display: block;background: none;width: 100%;box-shadow: none;border: none;" tabindex="-1" role="dialog" aria-hidden="true"

Description

ARIA hidden element must not be focusable or contain focusable elements. Detected by axe-core rule aria-hidden-focus on 1 of 3333 scanned pages (1 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/ARDI.
  2. Locate the element: #divIdleTimeout
  3. Confirm the axe-core finding for rule aria-hidden-focus against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

How to fix: Don't put focusable elements inside aria-hidden="true"; they become a keyboard trap for screen-reader users.

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 3062/3333 pages · 22524 instances Likely template
Bug ID
VS-1d43ca41
Pattern ID
VS-f18df681
Combined ID
VS-1d43ca41 (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.cdc-site-gov-notice
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<div class="cdc-site-gov-notice noindex noprint" aria-label="Un sitio oficial del Gobierno de Estados Unidos">

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 3062 of 3333 scanned pages (22524 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/spanish/niosh/docs/wp-solutions/2010-150_sp.
  2. Locate the element: .cdc-site-gov-notice
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 3062 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe label-title-only Best Practice Form elements should have a visible label (WCAG criterion undetermined) 136/3333 pages · 136 instances Likely template
Bug ID
VS-1701fe85
Pattern ID
VS-33841929
Combined ID
VS-1701fe85 (pattern VS-33841929) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.smallfield
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

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

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 136 of 3333 scanned pages (136 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2009/jan/07_0240.htm.
  2. Locate the element: .smallfield
  3. Confirm the axe-core finding for rule label-title-only.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 136 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe tabindex Best Practice Elements should not have tabindex greater than zero (WCAG criterion undetermined) 3/3333 pages · 9 instances
Bug ID
VS-71adeed8
Pattern ID
VS-7430f84c
Combined ID
VS-71adeed8 (pattern VS-7430f84c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
a[href$="#content"]
History
first seen 2026-W24, last seen 2026-W29 (2 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 3333 scanned pages (9 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/index.html.
  2. Locate the element: a[href$="#content"]
  3. Confirm the axe-core finding for rule tabindex.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

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

Serious axe aria-dialog-name Best Practice ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined) 1/3333 pages · 1 instances Likely content
Bug ID
VS-c7d3ae83
Pattern ID
VS-fa724f90
Combined ID
VS-c7d3ae83 (pattern VS-fa724f90) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.sr-modal-dialog
History
first seen 2026-W29, last seen 2026-W29 (1 wk)

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

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

Description

ARIA dialog and alertdialog nodes should have an accessible name. Detected by axe-core rule aria-dialog-name on 1 of 3333 scanned pages (1 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

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

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) 534/3333 pages · 5627 instances Likely template
Bug ID
VS-68a802f2
Pattern ID
VS-179ad9b3
Combined ID
VS-68a802f2 (pattern VS-179ad9b3) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.2 AA
Obligation
required
Handling
review
WCAG SC
2.5.8 Target Size (Minimum) (Level AA, WCAG 2.2)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 534 of 3333 scanned pages (5627 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: <a href="#content_area">
  3. Confirm the Siteimprove Alfa finding for rule sia-r113 against WCAG 2.5.8 Target Size (Minimum).

Impact

Affects Limited manipulation/strength (13.0%), Limited reach (2.0%), Limited vision (2.4%).

  • Limited manipulation/strength — 13.0% of population
  • Limited reach — 2.0% of population
  • Limited vision — 2.4% of population

Affected pages

…and more — all 534 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r69 WCAG 2.0 AA Text has sufficient color contrast (Enhanced) (WCAG 1.4.3) 456/3333 pages · 2551 instances · possible duplicate Likely template
Bug ID
VS-23c29705
Pattern ID
VS-f7e99f4b
Combined ID
VS-23c29705 (pattern VS-f7e99f4b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
text: "Related Pages"
History
first seen 2026-W24, last seen 2026-W29 (6 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-3254ef35 (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 456 of 3333 scanned pages (2551 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: text: "Related Pages"
  3. Confirm the Siteimprove Alfa finding for rule sia-r69 against WCAG 1.4.3 Contrast (Minimum).

Impact

Affects Limited vision (2.4%), Without color perception (4.5%).

  • Limited vision — 2.4% of population
  • Without color perception — 4.5% of population

Affected pages

…and more — all 456 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r2 WCAG 2.0 A Image has accessible name (WCAG 1.1.1) 297/3333 pages · 2694 instances Likely template
Bug ID
VS-27f783be
Pattern ID
VS-a24eaa8c
Combined ID
VS-27f783be (pattern VS-a24eaa8c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
<img src="../../images/spacer.gif" width="10" height="1" alt=" ">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 297 of 3333 scanned pages (2694 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: <img src="../../images/spacer.gif" width="10" height="1" alt=" ">
  3. Confirm the Siteimprove Alfa finding for rule sia-r2 against WCAG 1.1.1 Non-text Content.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 297 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r4 WCAG 2.0 A Document has a valid lang attribute (WCAG 3.1.1) 281/3333 pages · 281 instances Likely template
Bug ID
VS-9339d337
Pattern ID
VS-7a0e5645
Combined ID
VS-9339d337 (pattern VS-7a0e5645) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
3.1.1 Language of Page (Level A, WCAG 2.0)
XPath / selector
<html>
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 281 of 3333 scanned pages (281 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: <html>
  3. Confirm the Siteimprove Alfa finding for rule sia-r4 against WCAG 3.1.1 Language of Page.

Impact

Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 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: Add a valid lang attribute to <html>.

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

Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 191/3333 pages · 405 instances Likely template
Bug ID
VS-3fb7f564
Pattern ID
VS-f7dba940
Combined ID
VS-3fb7f564 (pattern VS-f7dba940) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.1 A
Obligation
required
Handling
review
WCAG SC
2.5.3 Label in Name (Level A, WCAG 2.1)
XPath / selector
<a href="/listeria/about/index.html" class="cdc-footer__super-title" aria-label="<em>Listeria </em>Infection (Listeriosis)">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 191 of 3333 scanned pages (405 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/listeria/outbreaks/meat-and-poultry-products-11-24/index.html.
  2. Locate the element: <a href="/listeria/about/index.html" class="cdc-footer__super-title" aria-label="<em>Listeria </em>Infection (Listeriosis)">
  3. Confirm the Siteimprove Alfa finding for rule sia-r14 against WCAG 2.5.3 Label in Name.

Impact

Affects Without vision (1.0%), Without speech (0.5%).

  • Without vision — 1.0% of population
  • Without speech — 0.5% of population

Affected pages

…and more — all 191 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 184/3333 pages · 2213 instances Likely template
Bug ID
VS-0bbaaedd
Pattern ID
VS-d6097011
Combined ID
VS-0bbaaedd (pattern VS-d6097011) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<ul>
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 184 of 3333 scanned pages (2213 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: <ul>
  3. Confirm the Siteimprove Alfa finding for rule sia-r68 against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 184 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 101/3333 pages · 122 instances Likely template
Bug ID
VS-ecee6cde
Pattern ID
VS-a48e6078
Combined ID
VS-ecee6cde (pattern VS-a48e6078) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
<input id="searchBox" class="searchBox" name="query" maxlength="256">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 101 of 3333 scanned pages (122 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6006a6.htm?s_cid=mm6006a6_w.
  2. Locate the element: <input id="searchBox" class="searchBox" name="query" maxlength="256">
  3. Confirm the Siteimprove Alfa finding for rule sia-r8 against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

…and more — all 101 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: Associate the form field with a label.

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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 87/3333 pages · 183 instances Likely template
Bug ID
VS-196b506f
Pattern ID
VS-28ebd979
Combined ID
VS-196b506f (pattern VS-28ebd979) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
<a href="http://www.cdc.gov/">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 87 of 3333 scanned pages (183 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2009/jan/07_0240.htm.
  2. Locate the element: <a href="http://www.cdc.gov/">
  3. Confirm the Siteimprove Alfa finding for rule sia-r11 against WCAG 2.4.4 Link Purpose (In Context).

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

…and more — all 87 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r12 WCAG 2.0 A Button has accessible name (WCAG 4.1.2) 14/3333 pages · 84 instances Likely template
Bug ID
VS-ca3b73b7
Pattern ID
VS-29f9f921
Combined ID
VS-ca3b73b7 (pattern VS-29f9f921) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
<span role="button" class="sort-icon">
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

Description

Button has accessible name. Detected by Siteimprove Alfa rule sia-r12 on 14 of 3333 scanned pages (84 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/united-states-cancer-statistics/publications/prostate-cancer-stat-bite.html.
  2. Locate the element: <span role="button" class="sort-icon">
  3. Confirm the Siteimprove Alfa finding for rule sia-r12 against WCAG 4.1.2 Name, Role, Value.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited manipulation/strength — 13.0% of population

Affected pages

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r64 WCAG 2.0 A Element has required owned roles (WCAG 1.3.1) 14/3333 pages · 14 instances Likely template
Bug ID
VS-e479ee30
Pattern ID
VS-3c632d31
Combined ID
VS-e479ee30 (pattern VS-3c632d31) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<h3>
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Element has required owned roles. Detected by Siteimprove Alfa rule sia-r64 on 14 of 3333 scanned pages (14 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5544a4.htm.
  2. Locate the element: <h3>
  3. Confirm the Siteimprove Alfa finding for rule sia-r64 against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Moderate alfa sia-r77 WCAG 2.0 A Table cell has header (WCAG 1.3.1) 12/3333 pages · 18612 instances Likely template
Bug ID
VS-30b87464
Pattern ID
VS-3f067795
Combined ID
VS-30b87464 (pattern VS-3f067795) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<td scope="row" class="infrequent-end-table-title" colspan="16">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Table cell has header. Detected by Siteimprove Alfa rule sia-r77 on 12 of 3333 scanned pages (18612 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019md.htm?s_cid=mm6019md_w.
  2. Locate the element: <td scope="row" class="infrequent-end-table-title" colspan="16">
  3. Confirm the Siteimprove Alfa finding for rule sia-r77 against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Moderate alfa sia-r46 WCAG 2.0 A Element has required aria-owns (WCAG 1.3.1) 10/3333 pages · 39 instances Likely template
Bug ID
VS-6e4bf7f1
Pattern ID
VS-4408605e
Combined ID
VS-6e4bf7f1 (pattern VS-4408605e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<th class="sorting" tabindex="0" aria-controls="DataTables_Table_0" rowspan="1">
History
first seen 2026-W25, last seen 2026-W29 (5 wk)

Description

Element has required aria-owns. Detected by Siteimprove Alfa rule sia-r46 on 10 of 3333 scanned pages (39 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-b/table-2-7.html.
  2. Locate the element: <th class="sorting" tabindex="0" aria-controls="DataTables_Table_0" rowspan="1">
  3. Confirm the Siteimprove Alfa finding for rule sia-r46 against WCAG 1.3.1 Info and Relationships.

Impact

Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).

  • Without vision — 1.0% of population
  • Limited vision — 2.4% of population
  • Limited cognitive, language, or learning ability — 11.0% of population

Affected pages

Testing environment

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

Suggested fix

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

Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 1495/3333 pages · 45549 instances Likely template
Bug ID
VS-2788d8f3
Pattern ID
VS-cb53cc4d
Combined ID
VS-2788d8f3 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 1495 of 3333 scanned pages (45549 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: <button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
  3. Confirm the Siteimprove Alfa finding for rule sia-r111 against WCAG 2.5.5 Target Size (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1495 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r66 WCAG 2.x AAA Text has enhanced contrast (WCAG 1.4.6) 1263/3333 pages · 37951 instances Likely template
Bug ID
VS-3f190ef2
Pattern ID
VS-646b1e0b
Combined ID
VS-3f190ef2 (pattern VS-646b1e0b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.6 Contrast (Enhanced) (Level AAA, WCAG 2.0)
XPath / selector
text: " Here's how you know "
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 1263 of 3333 scanned pages (37951 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: text: " Here's how you know "
  3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1263 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r57 Undetermined Scrolling content can be accessed by keyboard (WCAG criterion undetermined) 1092/3333 pages · 15960 instances Likely template
Bug ID
VS-c8ad3454
Pattern ID
VS-c18be945
Combined ID
VS-c8ad3454 (pattern VS-c18be945) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
text: "Skip directly to search"
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 1092 of 3333 scanned pages (15960 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: text: "Skip directly to search"
  3. Confirm the Siteimprove Alfa finding for rule sia-r57.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1092 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 1035/3333 pages · 1500 instances Likely template
Bug ID
VS-f6344d97
Pattern ID
VS-d25f622d
Combined ID
VS-f6344d97 (pattern VS-d25f622d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.dfe-section:nth-child(5) > h4
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<h4>Resources</h4>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 1035 of 3333 scanned pages (1500 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: .dfe-section:nth-child(5) > h4
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1035 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 868/3333 pages · 900 instances Likely template
Bug ID
VS-3e0e154a
Pattern ID
VS-8806389c
Combined ID
VS-3e0e154a (pattern VS-8806389c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.page-right-rail__static
History
first seen 2026-W24, last seen 2026-W29 (6 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 868 of 3333 scanned pages (900 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: .page-right-rail__static
  3. Confirm the axe-core finding for rule landmark-unique.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 868 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 843/3333 pages · 843 instances Likely template
Bug ID
VS-abe49e0e
Pattern ID
VS-d5d82446
Combined ID
VS-abe49e0e (pattern VS-d5d82446) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#js
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

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

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 843 of 3333 scanned pages (843 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6027a1.htm?s_cid=mm6027a1_w.
  2. Locate the element: #js
  3. Confirm the axe-core finding for rule landmark-one-main.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 843 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 777/3333 pages · 796 instances Likely template
Bug ID
VS-52cf09da
Pattern ID
VS-e05344b9
Combined ID
VS-52cf09da (pattern VS-e05344b9) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
@aria-label="Official website of the United States government"
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 777 of 3333 scanned pages (796 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: @aria-label="Official website of the United States government"
  3. Confirm the Siteimprove Alfa finding for rule sia-r18.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 777 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 575/3333 pages · 58190 instances Likely template
Bug ID
VS-d8317446
Pattern ID
VS-fbf54eba
Combined ID
VS-d8317446 (pattern VS-fbf54eba) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 575 of 3333 scanned pages (58190 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: <p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">
  3. Confirm the Siteimprove Alfa finding for rule sia-r74 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 575 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 491/3333 pages · 202309 instances Likely template
Bug ID
VS-d23a4e14
Pattern ID
VS-2208081b
Combined ID
VS-d23a4e14 (pattern VS-2208081b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p align="left">
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 491 of 3333 scanned pages (202309 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5510a3.htm.
  2. Locate the element: <p align="left">
  3. Confirm the Siteimprove Alfa finding for rule sia-r73 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 491 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 490/3333 pages · 713 instances Likely template
Bug ID
VS-133cc720
Pattern ID
VS-f054f4a4
Combined ID
VS-133cc720 (pattern VS-f054f4a4) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h4>
History
first seen 2026-W24, last seen 2026-W29 (6 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 490 of 3333 scanned pages (713 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/clean-hands/hcp/clinical-safety.
  2. Locate the element: <h4>
  3. Confirm the Siteimprove Alfa finding for rule sia-r53.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 490 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

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

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

SeverityFindingWCAG categoryPages
Moderate No obsolete or deprecated elements are used (WCAG criterion undetermined) [sia-r70] Undetermined 386
Moderate Page should contain a level-one heading (WCAG criterion undetermined) [page-has-heading-one] Best Practice 189
Moderate Form field label is visible (WCAG criterion undetermined) [sia-r61] Undetermined 181
Minor ARIA role should be appropriate for the element (WCAG criterion undetermined) [aria-allowed-role] Best Practice 136
Moderate Table header has scope (WCAG criterion undetermined) [sia-r78] Undetermined 105
Moderate Presentational attribute (use CSS) (WCAG criterion undetermined) [presentational-attr] Undetermined 96
Moderate Obsolete <font> element (use CSS) (WCAG criterion undetermined) [font-element] Undetermined 67
Minor Table header text should not be empty (WCAG criterion undetermined) [empty-table-header] Best Practice 62
Moderate Obsolete <big> element (use CSS) (WCAG criterion undetermined) [big-element] Undetermined 44
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 37
Minor Headings should not be empty (WCAG criterion undetermined) [empty-heading] Best Practice 26
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 22
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 19
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 14
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 10
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 10
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 9
Moderate Element role is consistent with ARIA landmark (WCAG criterion undetermined) [sia-r72] Undetermined 7
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 6
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 6
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 5
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 4
Moderate Scrollable element is keyboard accessible (WCAG 1.4.8) [sia-r80] WCAG 2.x AAA 3
Moderate Contentinfo landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-contentinfo-is-top-level] Best Practice 3
Moderate Document has a title element (WCAG 2.4.2) [sia-r1] WCAG 2.0 A 3
Moderate Document should not have more than one banner landmark (WCAG criterion undetermined) [landmark-no-duplicate-banner] Best Practice 3
Moderate Document should not have more than one contentinfo landmark (WCAG criterion undetermined) [landmark-no-duplicate-contentinfo] Best Practice 3
Moderate Keyboard (WCAG 2.1.1) [sia-r84] WCAG 2.0 A 2
Moderate Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 2
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 1
Moderate Element in required WAI-ARIA context role (WCAG 1.3.1) [sia-r42] WCAG 2.0 A 1
Moderate aria-hidden element does not contain focusable elements (WCAG 4.1.2) [sia-r17] WCAG 2.0 A 1
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 1
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] Undetermined 1
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] WCAG 2.0 A 1
Minor Tables should not have the same summary and caption (WCAG criterion undetermined) [table-duplicate-name] Best Practice 1

Deque axe-core findings

Rule-level axe-core summary (42 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-W29, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 3062 22524 /spanish/niosh/docs/wp-solutions/2010-150_sp
/clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html		 all 3062 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 1035 1500 /clean-hands/hcp/clinical-safety
/mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm		 all 1035 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 868 900 /clean-hands/hcp/clinical-safety
/contact-lenses/prevention/index.html
/high-blood-pressure/risk-factors/index.html		 all 868 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 843 843 /mmwr/preview/mmwrhtml/mm6027a1.htm
/mmwr/preview/mmwrhtml/mm5936a6.htm
/mmwr/preview/mmwrhtml/mm5510a3.htm		 all 843 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 720 1085 /mmwr/preview/mmwrhtml/mm6027a1.htm
/mmwr/preview/mmwrhtml/mm5936a6.htm
/mmwr/preview/mmwrhtml/mm5510a3.htm		 all 720 pages (CSV)
Images must have alternative text [image-alt] critical 622 6181 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/00056485.htm		 all 622 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 595 595 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/00056485.htm		 all 595 pages (CSV)
Links must have discernible text [link-name] serious 196 431 /pcd/issues/2009/jan/07_0240.htm
/pcd/issues/2009/jan/08_0009_fr.htm
/pcd/issues/2008/jan/06_0144_zht.htm		 all 196 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 189 189 /ncird/site.html
/coronavirus/2019-ncov/community/correction-detention/guidance-correctional-detention.html
/balantidium/site.html		 all 189 pages (CSV)
Form elements must have labels [label] critical 185 190 /mmwr/preview/mmwrhtml/mm6027a1.htm
/mmwr/preview/mmwrhtml/mm5936a6.htm
/mmwr/preview/mmwrhtml/mm6006a6.htm		 all 185 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 136 151 /spanish/niosh/docs/wp-solutions/2010-150_sp
/niosh/docs/2012-162
/niosh/docs/2010-125		 all 136 pages (CSV)
Form elements should have a visible label [label-title-only] serious 136 136 /pcd/issues/2009/jan/07_0240.htm
/pcd/issues/2009/jan/08_0009_fr.htm
/pcd/issues/2008/jan/06_0144_zht.htm		 all 136 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 63 70 /early-care-education/php/success-stories/licensing.html
/hepatitis/php/npr-2024/overview.html
/suicide/playbook/step-5.html		 all 63 pages (CSV)
Table header text should not be empty [empty-table-header] minor 62 282 /mmwr/preview/mmwrhtml/mm6019md.htm
/mmwr/preview/mmwrhtml/mm6013md.htm
/mmwr/preview/mmwrhtml/mm6007a2.htm		 all 62 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 39 47 /mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/00020374.htm
/mmwr/preview/mmwrhtml/00017905.htm		 all 39 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 37 37 /pcd/issues/2013/12_0322_es.htm
/pcd/issues/2013/11_0285_es.htm
/pcd/issues/2012/11_0277_es.htm		 all 37 pages (CSV)
Headings should not be empty [empty-heading] minor 26 26 /niosh/idlh/default.html
/mmwr/preview/mmwrhtml/rr5705a1.htm
/mmwr/preview/mmwrhtml/mm5518a1.htm		 all 26 pages (CSV)
Frames must have an accessible name [frame-title] serious 22 30 /parenting-teens/tips-coaching-emotions/index.html
/cancer-survivors/patients/blood-clots.html
/tb/hcp/mantoux/video.html		 all 22 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 17 25 /nchs/nvss/vsrr.htm
/tobacco/campaign/tips/spanish/poblaciones/hispano-latino.html
/tobacco/campaign/tips/spanish/poblaciones/asiaticoamericanos.html		 all 17 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 15 25 /mmwr/volumes/65/wr/mm6516a1.htm
/mmwr/volumes/65/wr/mm6530a3.htm
/malaria/php/surveillance-report/2021.html		 all 15 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 12 111 /united-states-cancer-statistics/publications/prostate-cancer-stat-bite.html
/united-states-cancer-statistics/publications/colorectal-cancer-stat-bite.html
/hearing-loss-children/data/demographic-data.html		 all 12 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 9 96 /acip/evidence-to-recommendations/bla-covid-19-moderna-etr.html
/pcd/issues/2016/16_0009.htm
/mmwr/volumes/74/rr/rr7401a1_AppendixA.htm		 all 9 pages (CSV)
Select element must have an accessible name [select-name] critical 8 26 /nchs/hus/contents2019.htm
/nchs/hus/data-finder.htm
/tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/como-usar-medicamentos/vareniclina.html		 all 8 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 5 20 /immigrant-refugee-health/hcp/panel-physicians/vaccination.html
/vaccines/hcp/imz-schedules/child-adolescent-age.html
/vaccines/hcp/imz-schedules/adult-age-compliant.html		 all 5 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 5 13 /spanish/niosh
/injury/wisqars
/ARDI		 all 5 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 4 5 /mmwr/preview/mmwrhtml/rr5208a1.htm
/mmwr/preview/mmwrhtml/rr5402a1.htm
/mmwr/preview/mmwrhtml/mm5624a6.htm		 all 4 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 3 137 /clean-hands/hcp/clinical-safety
/physical-activity-basics/about/index.html
/mmwr/preview/mmwrhtml/rr5402a1.htm		 all 3 pages (CSV)
Elements should not have tabindex greater than zero [tabindex] serious 3 9 /index.html
/spanish/niosh
/Spanish		 all 3 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 3 5 /nchs/nvss/vsrr/mortality-dashboard.htm
/stophivtogether/hiv-testing/self-testing.html
/contraception/hcp/usmec/intrauterine-devices.html		 all 3 pages (CSV)
Documents must have <title> element to aid in navigation [document-title] serious 3 3 /mmwr/preview/mmwrhtml/mm5906md.htm
/mmwr/preview/mmwrhtml/mm5906a4.htm
/mmwr/preview/mmwrhtml/mm5906a1.htm		 all 3 pages (CSV)
Contentinfo landmark should not be contained in another landmark [landmark-contentinfo-is-top-level] moderate 3 3 /index.html
/spanish/niosh
/Spanish		 all 3 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner] moderate 3 3 /index.html
/spanish/niosh
/Spanish		 all 3 pages (CSV)
Document should not have more than one contentinfo landmark [landmark-no-duplicate-contentinfo] moderate 3 3 /index.html
/spanish/niosh
/Spanish		 all 3 pages (CSV)
Elements must only use permitted ARIA attributes [aria-prohibited-attr] serious 2 2 /niosh/data/datasets/rd-1081-2024-0/default.html
/stophivtogether/hiv-testing/self-testing.html		 all 2 pages (CSV)
Buttons must have discernible text [button-name] critical 2 2 /lead-prevention/communication-resources/index.html
/hiv/prevention/condoms.html		 all 2 pages (CSV)
Certain ARIA roles must be contained by particular parents [aria-required-parent] critical 1 5 /contraception/hcp/usmec/intrauterine-devices.html all 1 pages (CSV)
Elements must only use supported ARIA attributes [aria-allowed-attr] critical 1 3 /nchs/nvss/vsrr/mortality-dashboard.htm all 1 pages (CSV)
ARIA attributes must conform to valid values [aria-valid-attr-value] critical 1 2 /nchs/nvss/vsrr/infant-mortality-dashboard.htm all 1 pages (CSV)
ARIA input fields must have an accessible name [aria-input-field-name] serious 1 2 /overdose-prevention/data-research/facts-stats/dose-sys-accessible.html all 1 pages (CSV)
Tables should not have the same summary and caption [table-duplicate-name] minor 1 1 /brfss/annual_data/2023/llcp_varlayout_23_onecolumn.html all 1 pages (CSV)
ARIA dialog and alertdialog nodes should have an accessible name [aria-dialog-name] serious 1 1 /wtc all 1 pages (CSV)
ARIA hidden element must not be focusable or contain focusable elements [aria-hidden-focus] serious 1 1 /ARDI all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (39 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-W29, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 1495 45549 /clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/high-blood-pressure/risk-factors/index.html		 all 1495 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 1263 37951 /clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/high-blood-pressure/risk-factors/index.html		 all 1263 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 1092 15960 /clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/high-blood-pressure/risk-factors/index.html		 all 1092 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 777 796 /clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/high-blood-pressure/risk-factors/index.html		 all 777 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 575 58190 /mmwr/preview/mmwrhtml/mm5510a3.htm
/niosh/docs/2012-162
/niosh/docs/2010-125		 all 575 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 534 5627 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/mm6006a6.htm		 all 534 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 491 202309 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/mm6006a6.htm		 all 491 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 490 713 /clean-hands/hcp/clinical-safety
/mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm		 all 490 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 456 2551 /clean-hands/hcp/clinical-safety
/high-blood-pressure/risk-factors/index.html
/immigrant-refugee-health/hcp/domestic-guidance/mental-health.html		 all 456 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 386 386 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/mm6006a6.htm		 all 386 pages (CSV)
Image has accessible name [sia-r2] n/a 297 2694 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/00056485.htm		 all 297 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 281 281 /mmwr/preview/mmwrhtml/mm5510a3.htm
/mmwr/preview/mmwrhtml/00039349.htm
/mmwr/preview/mmwrhtml/00056485.htm		 all 281 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 191 405 /listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/mold-health/communication-resources/shopping-list-for-cleaning-mold.html
/mycoplasma/php/surveillance/index.html		 all 191 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 184 2213 /clean-hands/hcp/clinical-safety
/listeria/outbreaks/meat-and-poultry-products-11-24/index.html
/high-blood-pressure/risk-factors/index.html		 all 184 pages (CSV)
Form field label is visible [sia-r61] n/a 181 181 /mmwr/preview/mmwrhtml/mm6006a6.htm
/mmwr/preview/mmwrhtml/mm6417a5.htm
/mmwr/preview/mmwrhtml/mm6005a5.htm		 all 181 pages (CSV)
Table header has scope [sia-r78] n/a 105 137 /mmwr/volumes/65/wr/mm6552a11.htm
/mmwr/volumes/65/wr/mm6543a6.htm
/candida-auris/hcp/infection-control/index.html		 all 105 pages (CSV)
Form field has accessible name [sia-r8] n/a 101 122 /mmwr/preview/mmwrhtml/mm6006a6.htm
/mmwr/preview/mmwrhtml/mm6417a5.htm
/mmwr/preview/mmwrhtml/mm6005a5.htm		 all 101 pages (CSV)
Link has accessible name [sia-r11] n/a 87 183 /pcd/issues/2009/jan/07_0240.htm
/pcd/issues/2009/jan/08_0009_fr.htm
/pcd/issues/2010/sep/10_0046.htm		 all 87 pages (CSV)
Input purpose can be determined [sia-r60] n/a 22 25 /pcd/issues/2012/11_0277_es.htm
/pcd/issues/2012/11_0295_es.htm
/mmwr/indss_2008.html		 all 22 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 19 79 /mmwr/preview/mmwrhtml/00056485.htm
/mmwr/preview/mmwrhtml/mm4824a2.htm
/mmwr/preview/mmwrhtml/00038946.htm		 all 19 pages (CSV)
Button has accessible name [sia-r12] n/a 14 84 /united-states-cancer-statistics/publications/prostate-cancer-stat-bite.html
/united-states-cancer-statistics/publications/colorectal-cancer-stat-bite.html
/hearing-loss-children/data/demographic-data.html		 all 14 pages (CSV)
Element has required owned roles [sia-r64] n/a 14 14 /mmwr/preview/mmwrhtml/mm5544a4.htm
/mmwr/preview/mmwrhtml/mm5126a1.htm
/mmwr/volumes/74/wr/mm7401a1.htm		 all 14 pages (CSV)
Table cell has header [sia-r77] n/a 12 18612 /mmwr/preview/mmwrhtml/mm6019md.htm
/mmwr/preview/mmwrhtml/mm6013md.htm
/mmwr/preview/mmwrhtml/mm6008md.htm		 all 12 pages (CSV)
Element has required aria-owns [sia-r46] n/a 10 39 /hepatitis-surveillance-2021/hepatitis-b/table-2-7.html
/foodnet/reports/preliminary-data.html
/vaccines/hcp/imz-schedules/child-adolescent-age.html		 all 10 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 10 14 /united-states-cancer-statistics/publications/prostate-cancer-stat-bite.html
/united-states-cancer-statistics/publications/colorectal-cancer-stat-bite.html
/hearing-loss-children/data/demographic-data.html		 all 10 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 10 14 /disability-and-health-partners/php/covid-19/index.html
/nchs/nvss/vsrr/infant-mortality-dashboard.htm
/nchs/w2w/index.htm		 all 10 pages (CSV)
Element role is consistent with ARIA landmark [sia-r72] n/a 7 235 /nchs/covid19/rands/reduced-access-to-care.htm
/pcd/issues/2013/2013_TOC.htm
/nchs/data-visualization/natality-trends		 all 7 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 6 43 /tobacco/campaign/tips/partners/hud/index.html
/tobacco/campaign/tips/spanish/enfermedades/tabaquismo-diabetes.html
/mmwr/preview/mmwrhtml/rr5908a1.htm		 all 6 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 6 11 /tobacco/campaign/tips/spanish/poblaciones/hispano-latino.html
/tobacco/campaign/tips/groups/hispanic-latino.html
/tobacco/campaign/tips/spanish/poblaciones/hispano-latino.html		 all 6 pages (CSV)
Form field error is identified and described [sia-r75] n/a 4 279 /mmwr/preview/mmwrhtml/mm5919a2.htm
/mmwr/preview/mmwrhtml/mm6143a3.htm
/mmwr/preview/mmwrhtml/mm5916a5.htm		 all 4 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 3 5 /pcd/issues/2010/sep/toc.htm
/ARDI
/Spanish		 all 3 pages (CSV)
Document has a title element [sia-r1] n/a 3 3 /mmwr/preview/mmwrhtml/mm5906md.htm
/mmwr/preview/mmwrhtml/mm5906a4.htm
/mmwr/preview/mmwrhtml/mm5906a1.htm		 all 3 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 2 2 /nchs/data-visualization/natality-trends
/nchs/data-visualization/mortality-leading-causes		 all 2 pages (CSV)
sia-r84 n/a 2 2 /fungal/hcp/laboratories/afst-of-yeasts-by-gradient-diffusion.html
/hepatitis-surveillance-2021/about/background.html		 all 2 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 1 6 /vaccines/hcp/imz-schedules/child-adolescent-age.html all 1 pages (CSV)
Element in required WAI-ARIA context role [sia-r42] n/a 1 5 /contraception/hcp/usmec/intrauterine-devices.html all 1 pages (CSV)
aria-hidden element does not contain focusable elements [sia-r17] n/a 1 2 /ARDI all 1 pages (CSV)
sia-r76 n/a 1 1 /fungal/hcp/laboratories/afst-of-yeasts-by-gradient-diffusion.html all 1 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 1 1 /mmwr/volumes/65/wr/mm6518md.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 (18078 raw engine findings → 17278 unique).

Unique issues (rule × page)
17278
Caught by both engines
797 highest confidence
axe only
8143
Alfa only
8338
11 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-W29, by pages affected.
IssuePagesRule references
Elements must only use permitted ARIA attributes779axe aria-prohibited-attr · Alfa sia-r18 · ACT 5c01ea
Images must have alternative text622axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute595axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Links must have discernible text196axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels192axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty26axe empty-heading · Alfa sia-r64 · ACT ffd0e9
ARIA commands must have an accessible name18axe aria-command-name · Alfa sia-r12 · ACT 97a4e1
Table cell headers attributes must refer to other <th> elements in the same table5axe td-headers-attr · Alfa sia-r45 · ACT a25f45
Documents must have <title> element to aid in navigation3axe document-title · Alfa sia-r1 · ACT 2779a5
Certain ARIA roles must contain particular children3axe aria-required-children · Alfa sia-r42 · ACT ff89c9
ARIA hidden element must not be focusable or contain focusable elements1axe aria-hidden-focus · Alfa sia-r17 · ACT 6cfa84