vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W30

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 1431 1
1.4.6 WCAG 1.4.6 1223 1
1.4.3 Contrast (Minimum) 1068 2
1.4.8 WCAG 1.4.8 1056 3
1.1.1 Non-text Content (images, icons) 892 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 ~563 finding(s) on 563 page(s).
XPath / selector: html
<html>
 Serious 563 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 ~282 finding(s) on 282 page(s).
XPath / selector: <html>
 Moderate 282 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~143 finding(s) on 143 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="插入电子邮件" value="插入电子邮件" onfocus="this.value=''">
 Serious 143 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~643 finding(s) on 643 page(s).
XPath / selector: html
<html>
 Moderate 643 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~138 finding(s) on 138 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--content">
 Moderate 138 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~170 finding(s) on 170 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
 Moderate 170 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 ~610 finding(s) on 610 page(s).
XPath / selector: @aria-label="Official website of the United States government"
 Moderate 610 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 ~194 finding(s) on 194 page(s).
XPath / selector: {"type":"document","children":[{"type":"element","children":[{"type":"element","
 Moderate 194 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)
Form field label is visible · unattributed component
Fix one place, resolve ~114 finding(s) on 114 page(s).
XPath / selector: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
 Moderate 114 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r61 pages (CSV)
No obsolete or deprecated elements are used · unattributed component
Fix one place, resolve ~167 finding(s) on 167 page(s).
XPath / selector: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
 Moderate 167 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)

Bug reports

36 issue type(s) are shown by default out of 82 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 7 critical, 18 serious, 53 moderate, 4 minor. By WCAG category: 37 WCAG 2.0 A, 2 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 17 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; 32 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

7 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) 648/3095 pages · 982 instances Likely template
Bug ID
VS-53c9a5d7
Pattern ID
VS-be8d563e
Combined ID
VS-53c9a5d7 (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
a[name="content_area"] > font[color="red"]
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 648 of 3095 scanned pages (982 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: a[name="content_area"] > font[color="red"]
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 648 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.

WordPress tip: Override contrast-failing colours in your child theme's style.css or via Appearance › Customize › Additional CSS. The WP Accessibility plugin includes a contrast checker for your colour palette.

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) 591/3095 pages · 6313 instances Likely template
Bug ID
VS-38c2a6e4
Pattern ID
VS-9074b4dd
Combined ID
VS-38c2a6e4 (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-W30 (7 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 591 of 3095 scanned pages (6313 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 591 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.

WordPress tip: In the Block Editor, click an Image block and fill "Alt text" in the sidebar. In the Media Library, set alt text on each image in the "Alternative Text" field so it pre-fills everywhere that image is used.

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) 563/3095 pages · 563 instances Likely template
Bug ID
VS-73d571ec
Pattern ID
VS-c126b6a6
Combined ID
VS-73d571ec (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-W30 (7 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 563 of 3095 scanned pages (563 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 563 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").

WordPress tip: WordPress sets the lang attribute from Settings › General › Site Language. Ensure the language matches the primary content language of the site.

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) 239/3095 pages · 679 instances Likely template
Bug ID
VS-7f7b7146
Pattern ID
VS-e9fe47ac
Combined ID
VS-7f7b7146 (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-W30 (7 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 239 of 3095 scanned pages (679 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/oct/07_0170_zhs.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 239 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.

WordPress tip: Replace generic "Read more" links with descriptive text. The WP Accessibility plugin's "Read More" fix can append the post title automatically.

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) 180/3095 pages · 191 instances Likely template
Bug ID
VS-fe45e143
Pattern ID
VS-fafffee0
Combined ID
VS-fe45e143 (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-W30 (7 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 180 of 3095 scanned pages (191 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5943a1.htm.
  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 180 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.

WordPress tip: For contact forms, use accessible plugins like Gravity Forms or Ninja Forms which generate proper label associations. Check that your theme's comment form and search form include visible labels.

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) 58/3095 pages · 90 instances Likely template
Bug ID
VS-47588799
Pattern ID
VS-8ade3360
Combined ID
VS-47588799 (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
li:nth-child(1) > a[href$="#tab1"]
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<a href="#tab1">Table&nbsp;1</a>

Description

Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 58 of 3095 scanned pages (90 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/su6101a1.htm?s_cid=su6101a1_w.
  2. Locate the element: li:nth-child(1) > a[href$="#tab1"]
  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 58 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) 38/3095 pages · 50 instances Likely template
Bug ID
VS-2845cb19
Pattern ID
VS-a0bdbdf6
Combined ID
VS-2845cb19 (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
.table.dfe-table.table-no-header:nth-child(8) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(2) > .table-col[role="cell"][data-col="2"] > ul
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<ul>

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 38 of 3095 scanned pages (50 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/bird-flu/prevention/worker-protection-ppe.html.
  2. Locate the element: .table.dfe-table.table-no-header:nth-child(8) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(2) > .table-col[role="cell"][data-col="2"] > ul
  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 38 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) 27/3095 pages · 69 instances Likely template
Bug ID
VS-abfe3302
Pattern ID
VS-3f76c7ea
Combined ID
VS-abfe3302 (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-W30 (7 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/FRvRRg1JUAU?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 27 of 3095 scanned pages (69 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vaccines/resources/video-shared-moments-experiences-immunity.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

…and more — all 27 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 <iframe> a descriptive title attribute.

WordPress tip: For embeds (YouTube, Google Maps), add a title via the Block Editor's Advanced panel or filter the embed output with oembed_result to inject the title attribute programmatically.

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 17/3095 pages · 21 instances Likely template
Bug ID
VS-20ea65f8
Pattern ID
VS-c613c153
Combined ID
VS-20ea65f8 (pattern VS-c613c153) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.1.1 Keyboard (Level A, WCAG 2.0)
XPath / selector
.cdc-textblock > div
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

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

Description

Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 17 of 3095 scanned pages (21 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/growth-chart-training/hcp/computer-programs/sas.html.
  2. Locate the element: .cdc-textblock > div
  3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 13/3095 pages · 17 instances Likely template
Bug ID
VS-00fcce8c
Pattern ID
VS-4b45acfe
Combined ID
VS-00fcce8c (pattern VS-4b45acfe) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.2.2 Pause, Stop, Hide (Level A, WCAG 2.0)
XPath / selector
blink
History
first seen 2026-W25, last seen 2026-W30 (6 wk)

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

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

Description

<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 13 of 3095 scanned pages (17 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5629a7.htm.
  2. Locate the element: blink
  3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 10/3095 pages · 122 instances Likely template
Bug ID
VS-d02cc4ba
Pattern ID
VS-5c82bd60
Combined ID
VS-d02cc4ba (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
.type-pie > .cove-visualization__body.cove-visualization__body--no-subtext.component--has-title > .cove-visualization__body-wrap > .cove-visualization__body-footer-section > .data-table-container.md[aria-label="Accessible data table."] > .table-container > table[aria-rowcount="5"] > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W30 (7 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 10 of 3095 scanned pages (122 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/united-states-cancer-statistics/publications/hpv-associated-cancers.html.
  2. Locate the element: .type-pie > .cove-visualization__body.cove-visualization__body--no-subtext.component--has-title > .cove-visualization__body-wrap > .cove-visualization__body-footer-section > .data-table-container.md[aria-label="Accessible data table."] > .table-container > table[aria-rowcount="5"] > 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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 8/3095 pages · 29 instances
Bug ID
VS-45b33163
Pattern ID
VS-58301a87
Combined ID
VS-45b33163 (pattern VS-58301a87) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#acc-header-2
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

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

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 8 of 3095 scanned pages (29 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/free-mind/about-substances/index.html.
  2. Locate the element: #acc-header-2
  3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 6/3095 pages · 13 instances
Bug ID
VS-9078e799
Pattern ID
VS-fab92378
Combined ID
VS-9078e799 (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-W30 (6 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 6 of 3095 scanned pages (13 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/hus/data-finder.htm?subject=Emergency+departments.
  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 listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 6/3095 pages · 38 instances
Bug ID
VS-7a637636
Pattern ID
VS-6175596b
Combined ID
VS-7a637636 (pattern VS-6175596b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > li:nth-child(1)
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<li>Required: Clinician/Health system engagement and health IT/PDMP enhancement</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 6 of 3095 scanned pages (38 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/overdose-prevention/php/od2a/prevention.html.
  2. Locate the element: .table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > 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 aria-prohibited-attr WCAG 2.0 A Elements must only use permitted ARIA attributes (WCAG 4.1.2) 6/3095 pages · 6 instances
Bug ID
VS-a96e4875
Pattern ID
VS-ebb1c464
Combined ID
VS-a96e4875 (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
#UNIQUE36545683a172a882dd
History
first seen 2026-W28, last seen 2026-W30 (3 wk)

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

<div class="cdc-card-slider cdc-video-slider slick-initialized slick-slider cdc-carousel-slider" id="UNIQUE36545683a172a882dd" aria-label="Carousel">

Description

Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 6 of 3095 scanned pages (6 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html.
  2. Locate the element: #UNIQUE36545683a172a882dd
  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-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 5/3095 pages · 24 instances
Bug ID
VS-6420f3a1
Pattern ID
VS-9429bb8d
Combined ID
VS-6420f3a1 (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-W30 (6 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 5 of 3095 scanned pages (24 instances).

Steps to reproduce

  1. Open http://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 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) 4/3095 pages · 5 instances
Bug ID
VS-3bc61875
Pattern ID
VS-07ba3b17
Combined ID
VS-3bc61875 (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-schedule
History
first seen 2026-W25, last seen 2026-W30 (6 wk)

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

<table class="table table-schedule table-bordered">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 4 of 3095 scanned pages (5 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vaccines/hcp/imz-schedules/child-adolescent-medical-indication.html.
  2. Locate the element: .table-schedule
  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

Critical axe button-name WCAG 2.0 A Buttons must have discernible text (WCAG 4.1.2) 2/3095 pages · 2 instances Likely content
Bug ID
VS-2f247b8a
Pattern ID
VS-e7298c00
Combined ID
VS-2f247b8a (pattern VS-e7298c00) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#search__icon
History
first seen 2026-W26, last seen 2026-W30 (4 wk)

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

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

Description

Buttons must have discernible text. Detected by axe-core rule button-name on 2 of 3095 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hiv/basics/livingwithhiv/opportunisticinfections.html.
  2. Locate the element: #search__icon
  3. Confirm the axe-core finding for rule button-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe aria-allowed-attr WCAG 2.0 A Elements must only use supported ARIA attributes (WCAG 4.1.2) 1/3095 pages · 3 instances Likely content
Bug ID
VS-39e575bd
Pattern ID
VS-1467ea8a
Combined ID
VS-39e575bd (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-W30 (4 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 3095 scanned pages (3 instances).

Steps to reproduce

  1. Open http://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-required-parent WCAG 2.0 A Certain ARIA roles must be contained by particular parents (WCAG 1.3.1) 1/3095 pages · 2 instances Likely content
Bug ID
VS-b57f5fa7
Pattern ID
VS-f6d344d5
Combined ID
VS-b57f5fa7 (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-responsive-md:nth-child(8) > .cdc-table.cdc-table__type-row[role="table"] > .table-body[role="rowgroup"] > div[role="row"]:nth-child(1) > div[data-col="2"][role="cell"] > p[role="rowheader"][data-col="1"]
History
first seen 2026-W29, last seen 2026-W30 (2 wk)

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

<p role="rowheader" data-col="1">260373001</p>

Description

Certain ARIA roles must be contained by particular parents. Detected by axe-core rule aria-required-parent on 1 of 3095 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/monkeypox/php/laboratories/reporting-test-results.html.
  2. Locate the element: .table-responsive-md:nth-child(8) > .cdc-table.cdc-table__type-row[role="table"] > .table-body[role="rowgroup"] > div[role="row"]:nth-child(1) > div[data-col="2"][role="cell"] > p[role="rowheader"][data-col="1"]
  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

Serious axe aria-hidden-focus WCAG 2.0 A ARIA hidden element must not be focusable or contain focusable elements (WCAG 4.1.2) 1/3095 pages · 4 instances Likely content
Bug ID
VS-d02da855
Pattern ID
VS-45146742
Combined ID
VS-d02da855 (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
.noLinking[data-slick-index="7"][aria-label="PCD 2024 Student Paper Contest"]
History
first seen 2026-W29, last seen 2026-W30 (2 wk)

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

<a href="/pcd/collections/PCD_2024_Contest.htm" class="card noLinking noDecoration text-black ds-8 slick-slide" style="width: 795px;" data-slick-index="7" aria-hidden="true" tabindex="-1" aria-label="

Description

ARIA hidden element must not be focusable or contain focusable elements. Detected by axe-core rule aria-hidden-focus on 1 of 3095 scanned pages (4 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/collections/index.htm.
  2. Locate the element: .noLinking[data-slick-index="7"][aria-label="PCD 2024 Student Paper Contest"]
  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.

WordPress tip: Themes and plugins that use modal dialogs (lightboxes, cookie banners) commonly cause this. Check the plugin's accessibility settings or file an issue requesting aria-hidden is removed before the element gains focus.

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

Serious axe aria-input-field-name WCAG 2.0 A ARIA input fields must have an accessible name (WCAG 4.1.2) 1/3095 pages · 1 instances Likely content
Bug ID
VS-b3a4d25e
Pattern ID
VS-0841abc2
Combined ID
VS-b3a4d25e (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
.combobox-select
History
first seen 2026-W25, last seen 2026-W30 (4 wk)

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

<ul class="combobox-select" role="listbox">

Description

ARIA input fields must have an accessible name. Detected by axe-core rule aria-input-field-name on 1 of 3095 scanned pages (1 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/respiratory-viruses/data-research/dashboard/activity-levels.html.
  2. Locate the element: .combobox-select
  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 region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 2833/3095 pages · 21085 instances Likely template
Bug ID
VS-a2df78bb
Pattern ID
VS-f18df681
Combined ID
VS-a2df78bb (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
img[width="5"]
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<img src="../../images/nav01.gif" border="0" width="5" height="2" alt="Skip Navigation Links">

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 2833 of 3095 scanned pages (21085 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: img[width="5"]
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 2833 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) 143/3095 pages · 143 instances Likely template
Bug ID
VS-14b766f5
Pattern ID
VS-33841929
Combined ID
VS-14b766f5 (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-W30 (7 wk)

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

<input class="smallfield" type="text" name="email" size="15" title="插入电子邮件" value="插入电子邮件" onfocus="this.value=''">

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 143 of 3095 scanned pages (143 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/oct/07_0170_zhs.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 143 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe aria-dialog-name Best Practice ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined) 3/3095 pages · 3 instances
Bug ID
VS-af428982
Pattern ID
VS-fa724f90
Combined ID
VS-af428982 (pattern VS-fa724f90) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#tooltip-\:r1\:
History
first seen 2026-W29, last seen 2026-W30 (2 wk)

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

<a id="tooltip-:r1:" role="dialog" tabindex="0" class="cove-tooltip--target" data-tooltip-float="false" data-tooltip-place="top" data-tooltip-isopen="true">

Description

ARIA dialog and alertdialog nodes should have an accessible name. Detected by axe-core rule aria-dialog-name on 3 of 3095 scanned pages (3 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/fluview/surveillance.
  2. Locate the element: #tooltip-\:r1\:
  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) 568/3095 pages · 5655 instances Likely template
Bug ID
VS-1e645ffe
Pattern ID
VS-179ad9b3
Combined ID
VS-1e645ffe (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-W30 (7 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 568 of 3095 scanned pages (5655 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 568 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) 420/3095 pages · 2299 instances · possible duplicate Likely template
Bug ID
VS-84b009a5
Pattern ID
VS-f7e99f4b
Combined ID
VS-84b009a5 (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-W30 (7 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-53c9a5d7 (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 420 of 3095 scanned pages (2299 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vessel-sanitation/php/training/index.html.
  2. Locate the element: text: "Related Pages"
  3. Confirm the Siteimprove Alfa finding for rule sia-r69 against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 420 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) 301/3095 pages · 3605 instances · possible duplicate Likely template
Bug ID
VS-fa7f626f
Pattern ID
VS-a24eaa8c
Combined ID
VS-fa7f626f (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-W30 (7 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-38c2a6e4 (pattern VS-9074b4dd). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 301 of 3095 scanned pages (3605 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 301 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) 282/3095 pages · 282 instances · possible duplicate Likely template
Bug ID
VS-ae887c3a
Pattern ID
VS-7a0e5645
Combined ID
VS-ae887c3a (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-W30 (7 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-73d571ec (pattern VS-c126b6a6). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 282 of 3095 scanned pages (282 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 282 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) 173/3095 pages · 351 instances Likely template
Bug ID
VS-189e5132
Pattern ID
VS-f7dba940
Combined ID
VS-189e5132 (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 data-action="print" href="#print" class="d-none d-md-block" aria-label="print this page">
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 173 of 3095 scanned pages (351 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tourette-syndrome/es/about/sobre-el-sindrome-de-gilles-de-la-tourette.html.
  2. Locate the element: <a data-action="print" href="#print" class="d-none d-md-block" aria-label="print this page">
  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 173 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) 170/3095 pages · 2149 instances Likely template
Bug ID
VS-d7806324
Pattern ID
VS-d6097011
Combined ID
VS-d7806324 (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-W30 (7 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 170 of 3095 scanned pages (2149 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/cryptosporidium.
  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 170 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 126/3095 pages · 313 instances · possible duplicate Likely template
Bug ID
VS-d14e29b4
Pattern ID
VS-28ebd979
Combined ID
VS-d14e29b4 (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="mailto: ">
History
first seen 2026-W24, last seen 2026-W30 (7 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-7f7b7146 (pattern VS-e9fe47ac). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 126 of 3095 scanned pages (313 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/laboratory/specimen-submission/detail.html?CDCTestCode=CDC-10133.
  2. Locate the element: <a href="mailto: ">
  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 126 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 97/3095 pages · 104 instances Likely template
Bug ID
VS-f997e437
Pattern ID
VS-a48e6078
Combined ID
VS-f997e437 (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-W30 (7 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 97 of 3095 scanned pages (104 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6029md.htm?s_cid=mm6029md_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 97 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-r64 WCAG 2.0 A Element has required owned roles (WCAG 1.3.1) 15/3095 pages · 26 instances Likely template
Bug ID
VS-e2ba9268
Pattern ID
VS-3c632d31
Combined ID
VS-e2ba9268 (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-W30 (7 wk)

Description

Element has required owned roles. Detected by Siteimprove Alfa rule sia-r64 on 15 of 3095 scanned pages (26 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5325a1.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-r12 WCAG 2.0 A Button has accessible name (WCAG 4.1.2) 12/3095 pages · 80 instances Likely template
Bug ID
VS-62e5e470
Pattern ID
VS-29f9f921
Combined ID
VS-62e5e470 (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
<button _ngcontent-emp-c17="" id="Sort" type="button" data-toggle="dropdown">
History
first seen 2026-W25, last seen 2026-W30 (6 wk)

Description

Button has accessible name. Detected by Siteimprove Alfa rule sia-r12 on 12 of 3095 scanned pages (80 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/nchs/nvss/facility-worksheets-guide/27.htm.
  2. Locate the element: <button _ngcontent-emp-c17="" id="Sort" type="button" data-toggle="dropdown">
  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-r77 WCAG 2.0 A Table cell has header (WCAG 1.3.1) 11/3095 pages · 9349 instances Likely template
Bug ID
VS-3445390b
Pattern ID
VS-3f067795
Combined ID
VS-3445390b (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-W30 (7 wk)

Description

Table cell has header. Detected by Siteimprove Alfa rule sia-r77 on 11 of 3095 scanned pages (9349 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6029md.htm?s_cid=mm6029md_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-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 1431/3095 pages · 42810 instances Likely template
Bug ID
VS-9489c487
Pattern ID
VS-cb53cc4d
Combined ID
VS-9489c487 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 1431 of 3095 scanned pages (42810 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: <a href="#content_area">
  3. Confirm the Siteimprove Alfa finding for rule sia-r111 against WCAG 2.5.5 Target Size (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1431 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) 1223/3095 pages · 35867 instances Likely template
Bug ID
VS-98196e60
Pattern ID
VS-646b1e0b
Combined ID
VS-98196e60 (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-W30 (7 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 1223 of 3095 scanned pages (35867 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vessel-sanitation/php/training/index.html.
  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 1223 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) 1021/3095 pages · 14692 instances Likely template
Bug ID
VS-5af98df2
Pattern ID
VS-c18be945
Combined ID
VS-5af98df2 (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-W30 (7 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 1021 of 3095 scanned pages (14692 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vessel-sanitation/php/training/index.html.
  2. Locate the element: text: "Skip directly to search"
  3. Confirm the Siteimprove Alfa finding for rule sia-r57.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1021 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) 989/3095 pages · 1420 instances Likely template
Bug ID
VS-787b764a
Pattern ID
VS-d25f622d
Combined ID
VS-787b764a (pattern VS-d25f622d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
h3:nth-child(7)
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<h3>Editorial Note</h3>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 989 of 3095 scanned pages (1420 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00000412.htm.
  2. Locate the element: h3:nth-child(7)
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 989 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.

WordPress tip: The Block Editor's Heading block lets you pick H1–H6 freely. Install the Equalize Digital Accessibility Checker plugin to flag skipped heading levels across your posts and pages.

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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 817/3095 pages · 817 instances Likely template
Bug ID
VS-2d983c89
Pattern ID
VS-d5d82446
Combined ID
VS-2d983c89 (pattern VS-d5d82446) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<html>

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 817 of 3095 scanned pages (817 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule landmark-one-main.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 817 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 axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 781/3095 pages · 814 instances Likely template
Bug ID
VS-cefdce5a
Pattern ID
VS-8806389c
Combined ID
VS-cefdce5a (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-W30 (7 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 781 of 3095 scanned pages (814 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vessel-sanitation/php/training/index.html.
  2. Locate the element: .page-right-rail__static
  3. Confirm the axe-core finding for rule landmark-unique.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 781 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 alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 691/3095 pages · 703 instances Likely template
Bug ID
VS-9869c454
Pattern ID
VS-e05344b9
Combined ID
VS-9869c454 (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-W30 (7 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 691 of 3095 scanned pages (703 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vessel-sanitation/php/training/index.html.
  2. Locate the element: @aria-label="Official website of the United States government"
  3. Confirm the Siteimprove Alfa finding for rule sia-r18.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 691 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) 558/3095 pages · 53508 instances Likely template
Bug ID
VS-456d8f28
Pattern ID
VS-fbf54eba
Combined ID
VS-456d8f28 (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-W30 (7 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 558 of 3095 scanned pages (53508 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.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 558 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-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 507/3095 pages · 730 instances Likely template
Bug ID
VS-b7889f38
Pattern ID
VS-f054f4a4
Combined ID
VS-b7889f38 (pattern VS-f054f4a4) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h3>
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 507 of 3095 scanned pages (730 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5734a5.htm.
  2. Locate the element: <h3>
  3. Confirm the Siteimprove Alfa finding for rule sia-r53.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 507 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 494/3095 pages · 155645 instances Likely template
Bug ID
VS-5a3dd654
Pattern ID
VS-2208081b
Combined ID
VS-5a3dd654 (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>
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 494 of 3095 scanned pages (155645 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: <p>
  3. Confirm the Siteimprove Alfa finding for rule sia-r73 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 494 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-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 366/3095 pages · 366 instances Likely template
Bug ID
VS-cf0214bc
Pattern ID
VS-3d033717
Combined ID
VS-cf0214bc (pattern VS-3d033717) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
advisory
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"element","children":[{"type":"element","
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 366 of 3095 scanned pages (366 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4937a4.htm.
  2. Locate the element: {"type":"document","children":[{"type":"element","children":[{"type":"element","
  3. Confirm the Siteimprove Alfa finding for rule sia-r70.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 366 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 176/3095 pages · 176 instances Likely template
Bug ID
VS-ef459632
Pattern ID
VS-7118fead
Combined ID
VS-ef459632 (pattern VS-7118fead) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 176 of 3095 scanned pages (176 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 176 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 138/3095 pages · 138 instances Likely template
Bug ID
VS-317c3994
Pattern ID
VS-fa44f293
Combined ID
VS-317c3994 (pattern VS-fa44f293) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<html lang="en-us" class="cdc-theme-cdc cdc-page-type--content">

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 138 of 3095 scanned pages (138 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/heads-up/site.html.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule page-has-heading-one.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 138 pages (CSV).

Testing environment

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

Suggested fix

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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 138/3095 pages · 150 instances Likely template
Bug ID
VS-2da821bd
Pattern ID
VS-4fac2f41
Combined ID
VS-2da821bd (pattern VS-4fac2f41) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
img[role="presentation"]
History
first seen 2026-W24, last seen 2026-W30 (7 wk)

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

<img src="/niosh/media/images/2026/06/2010-125.jpg" alt="NIOSH Hazard Review: Occupational Hazards in Home Healthcare" role="presentation">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 138 of 3095 scanned pages (150 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/publications/hcp/numbered/2010-125.html.
  2. Locate the element: img[role="presentation"]
  3. Confirm the axe-core finding for rule aria-allowed-role.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 138 pages (CSV).

Testing environment

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

Suggested fix

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

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

32 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 Table header has scope (WCAG criterion undetermined) [sia-r78] Undetermined 103
Moderate Presentational attribute (use CSS) (WCAG criterion undetermined) [presentational-attr] Undetermined 88
Moderate Obsolete <font> element (use CSS) (WCAG criterion undetermined) [font-element] Undetermined 55
Minor Table header text should not be empty (WCAG criterion undetermined) [empty-table-header] Best Practice 55
Moderate Obsolete <big> element (use CSS) (WCAG criterion undetermined) [big-element] Undetermined 38
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 30
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 27
Minor Headings should not be empty (WCAG criterion undetermined) [empty-heading] Best Practice 22
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 16
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 14
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 13
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 12
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 8
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 6
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 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 4
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 4
Moderate Element role is consistent with ARIA landmark (WCAG criterion undetermined) [sia-r72] Undetermined 3
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 3
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 2
Moderate Keyboard (WCAG 2.1.1) [sia-r84] WCAG 2.0 A 2
Moderate aria-hidden element does not contain focusable elements (WCAG 4.1.2) [sia-r17] WCAG 2.0 A 1
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] 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 Banner landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-banner-is-top-level] Best Practice 1
Moderate Document should not have more than one banner landmark (WCAG criterion undetermined) [landmark-no-duplicate-banner] Best Practice 1
Moderate Document should not have more than one main landmark (WCAG criterion undetermined) [landmark-no-duplicate-main] Best Practice 1
Moderate Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 1
Moderate Main landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-main-is-top-level] Best Practice 1
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 1
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 1

Deque axe-core findings

Rule-level axe-core summary (39 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-W30, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 2833 21085 /mmwr/preview/mmwrhtml/mm4937a4.htm
/vessel-sanitation/php/training/index.html
/heads-up/site.html		 all 2833 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 989 1420 /mmwr/preview/mmwrhtml/00000412.htm
/mmwr/preview/mmwrhtml/mm4824a1.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm		 all 989 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 817 817 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/00000412.htm
/mmwr/preview/mmwrhtml/mm4824a1.htm		 all 817 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 781 814 /vessel-sanitation/php/training/index.html
/tobacco/about/cigarettes-and-copd.html
/cfa-modeling-and-forecasting/rt-estimates/index.html		 all 781 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 648 982 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/00000412.htm
/mmwr/preview/mmwrhtml/mm4824a1.htm		 all 648 pages (CSV)
Images must have alternative text [image-alt] critical 591 6313 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/00000412.htm
/mmwr/preview/mmwrhtml/mm4824a1.htm		 all 591 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 563 563 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/00000412.htm
/mmwr/preview/mmwrhtml/mm4824a1.htm		 all 563 pages (CSV)
Links must have discernible text [link-name] serious 239 679 /pcd/issues/2008/oct/07_0170_zhs.htm
/laboratory/specimen-submission/detail.html
/pcd/issues/2009/jul/09_0013.htm		 all 239 pages (CSV)
Form elements must have labels [label] critical 180 191 /mmwr/preview/mmwrhtml/mm5943a1.htm
/mmwr/preview/mmwrhtml/mm6029md.htm
/mmwr/preview/mmwrhtml/mm6044a8.htm		 all 180 pages (CSV)
Form elements should have a visible label [label-title-only] serious 143 143 /pcd/issues/2008/oct/07_0170_zhs.htm
/pcd/issues/2009/jul/09_0013.htm
/pcd/issues/2011/jul/10_0196_es.htm		 all 143 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 138 150 /niosh/publications/hcp/numbered/2010-125.html
/niosh/publications/hcp/numbered/2015-117.html
/niosh/publications/es/numbered/2022-107sp.html		 all 138 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 138 138 /heads-up/site.html
/alcohol/index.html
/vaccinesafety/vaccines/hepatitis-b-vaccine.html		 all 138 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 58 90 /mmwr/preview/mmwrhtml/su6101a1.htm
/malaria/hcp/clinical-guidance/iv-artesunate-us.html
/contraception/hcp/usspr/implants.html		 all 58 pages (CSV)
Table header text should not be empty [empty-table-header] minor 55 192 /mmwr/preview/mmwrhtml/mm6029md.htm
/acip/grade/je-child.html
/mmwr/preview/mmwrhtml/mm6011a2.htm		 all 55 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 38 50 /bird-flu/prevention/worker-protection-ppe.html
/mmwr/preview/mmwrhtml/mm4851a2.htm
/mmwr/preview/mmwrhtml/00015924.htm		 all 38 pages (CSV)
Frames must have an accessible name [frame-title] serious 27 69 /vaccines/resources/video-shared-moments-experiences-immunity.html
/stop-overdose/es/safety/lo-que-puede-hacer-para-detectar-fentanilo.html
/folic-acid/php/toolkit/pov-fa.html		 all 27 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 27 27 /pcd/issues/2013/12_0096_es.htm
/pcd/issues/2012/12_0071_es.htm
/pcd/issues/2013/13_0137_es.htm		 all 27 pages (CSV)
Headings should not be empty [empty-heading] minor 22 33 /mmwr/preview/mmwrhtml/mm5325a1.htm
/free-mind/about-substances/index.html
/mmwr/preview/mmwrhtml/mm5331a4.htm		 all 22 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 17 21 /growth-chart-training/hcp/computer-programs/sas.html
/fluview/surveillance/2025-week-45.html
/fluview/surveillance/2025-week-44.html		 all 17 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 13 165 /niosh/healthcare/protective-clothing/standards.html
/fluview/surveillance/2025-week-45.html
/fluview/surveillance/2025-week-44.html		 all 13 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 13 17 /mmwr/preview/mmwrhtml/mm5629a7.htm
/mmwr/preview/mmwrhtml/rr5009a1.htm
/mmwr/preview/mmwrhtml/rr5202a2.htm		 all 13 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 10 122 /united-states-cancer-statistics/publications/hpv-associated-cancers.html
/hepatitis/php/npr-2023/hep-c-reduce-deaths.html
/hepatitis/php/npr-2025/hep-c-reduce-deaths-nhb.html		 all 10 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 8 29 /free-mind/about-substances/index.html
/tobacco/campaign/tips/spanish/poblaciones/vih.html
/mmwr/mmwrpodcasts.html		 all 8 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 6 38 /overdose-prevention/php/od2a/prevention.html
/wtc/administration.html
/dengue/es/hcp/vaccine/lista-de-verificacion-previa.html		 all 6 pages (CSV)
Select element must have an accessible name [select-name] critical 6 13 /nchs/hus/data-finder.htm
/nchs/pressroom/calendar/2022_schedule.htm
/nchs/hus/data-finder.htm		 all 6 pages (CSV)
Elements must only use permitted ARIA attributes [aria-prohibited-attr] serious 6 6 /stophivtogether/hiv-testing/self-testing.html
/stophivtogether/hiv-stigma/index.html
/niosh/data/datasets/rd-1008-2016-0/default.html		 all 6 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 5 24 /nchs/nvss/vsrr/mortality-dashboard.htm
/mmwr/mmwrpodcasts.html
/respiratory-viruses/data-research/dashboard/activity-levels.html		 all 5 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 4 5 /vaccines/hcp/imz-schedules/child-adolescent-medical-indication.html
/flu-vaccines-work/php/effectiveness-studies/2022-2023.html
/brfss/acbs/2023/prevalence_tables/table1_LLCP.html		 all 4 pages (CSV)
ARIA dialog and alertdialog nodes should have an accessible name [aria-dialog-name] serious 3 3 /fluview/surveillance
/niosh/topics/wtc/stac
/wtc/administration.html		 all 3 pages (CSV)
Buttons must have discernible text [button-name] critical 2 2 /hiv/basics/livingwithhiv/opportunisticinfections.html
/hiv/resourcelibrary/hiv-widgets.html		 all 2 pages (CSV)
ARIA hidden element must not be focusable or contain focusable elements [aria-hidden-focus] serious 1 4 /pcd/collections/index.htm 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)
Certain ARIA roles must be contained by particular parents [aria-required-parent] critical 1 2 /monkeypox/php/laboratories/reporting-test-results.html all 1 pages (CSV)
Banner landmark should not be contained in another landmark [landmark-banner-is-top-level] moderate 1 1 /flu/professionals/vaccination all 1 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner] moderate 1 1 /flu/professionals/vaccination all 1 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 1 1 /infection-control/hcp/pneumonia-prevention/index.html all 1 pages (CSV)
ARIA input fields must have an accessible name [aria-input-field-name] serious 1 1 /respiratory-viruses/data-research/dashboard/activity-levels.html all 1 pages (CSV)
Main landmark should not be contained in another landmark [landmark-main-is-top-level] moderate 1 1 /nhsn/faqs/cms/faq_cms_hai.html all 1 pages (CSV)
Document should not have more than one main landmark [landmark-no-duplicate-main] moderate 1 1 /nhsn/faqs/cms/faq_cms_hai.html all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (38 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-W30, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 1431 42810 /mmwr/preview/mmwrhtml/mm4937a4.htm
/vessel-sanitation/php/training/index.html
/nchs/namcs-provider-survey/about/index.html		 all 1431 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 1223 35867 /vessel-sanitation/php/training/index.html
/nchs/namcs-provider-survey/about/index.html
/niosh/npg/npgd0037.html		 all 1223 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 1021 14692 /vessel-sanitation/php/training/index.html
/nchs/namcs-provider-survey/about/index.html
/niosh/npg/npgd0037.html		 all 1021 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 691 703 /vessel-sanitation/php/training/index.html
/nchs/namcs-provider-survey/about/index.html
/cryptosporidium		 all 691 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 568 5655 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm		 all 568 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 558 53508 /mmwr/preview/mmwrhtml/mm4937a4.htm
/nchs/namcs-provider-survey/about/index.html
/mmwr/preview/mmwrhtml/mm5734a5.htm		 all 558 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 507 730 /mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm
/niosh/npg/npgd0037.html		 all 507 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 494 155645 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm		 all 494 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 420 2299 /vessel-sanitation/php/training/index.html
/nchs/namcs-provider-survey/about/index.html
/cryptosporidium		 all 420 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 366 366 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm		 all 366 pages (CSV)
Image has accessible name [sia-r2] n/a 301 3605 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm		 all 301 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 282 282 /mmwr/preview/mmwrhtml/mm4937a4.htm
/mmwr/preview/mmwrhtml/mm5734a5.htm
/mmwr/preview/mmwrhtml/mm4948a2.htm		 all 282 pages (CSV)
Form field label is visible [sia-r61] n/a 176 176 /alcohol/index.html
/mmwr/preview/mmwrhtml/mm6029md.htm
/pcd/issues/2013/12_0096_es.htm		 all 176 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 173 351 /tourette-syndrome/es/about/sobre-el-sindrome-de-gilles-de-la-tourette.html
/diabetes/es/prevention-type-2/la-sorprendente-verdad-sobre-la-prediabetes.html
/nis/confidentiality/index.html		 all 173 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 170 2149 /cryptosporidium
/mosquitoes/php/toolkit/mosquito-surveillance-software.html
/candidiasis/hcp/clinical-overview/index.html		 all 170 pages (CSV)
Link has accessible name [sia-r11] n/a 126 313 /laboratory/specimen-submission/detail.html
/pcd/issues/2009/jul/09_0013.htm
/pcd/issues/2011/jul/10_0196_es.htm		 all 126 pages (CSV)
Table header has scope [sia-r78] n/a 103 132 /laboratory/specimen-submission/detail.html
/pcd/issues/2013/12_0096_es.htm
/pcd/issues/2013/12_0336.htm		 all 103 pages (CSV)
Form field has accessible name [sia-r8] n/a 97 104 /mmwr/preview/mmwrhtml/mm6029md.htm
/mmwr/preview/mmwrhtml/mm6044a8.htm
/mmwr/preview/mmwrhtml/mm5935a2.htm		 all 97 pages (CSV)
Input purpose can be determined [sia-r60] n/a 30 32 /pcd/issues/2013/12_0096_es.htm
/pcd/issues/2013/12_0336.htm
/pcd/issues/2013/13_0137_es.htm		 all 30 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 16 32 /mmwr/preview/mmwrhtml/00050820.htm
/growth-chart-training/hcp/computer-programs/sas.html
/mmwr/preview/mmwrhtml/mm4830a2.htm		 all 16 pages (CSV)
Element has required owned roles [sia-r64] n/a 15 26 /mmwr/preview/mmwrhtml/mm5325a1.htm
/mmwr/preview/mmwrhtml/mm5331a4.htm
/pcd/issues/2020/19_0430.htm		 all 15 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 14 17 /tourette-syndrome/es/about/sobre-el-sindrome-de-gilles-de-la-tourette.html
/nchs/state-stats/deaths/suicide.html
/typhoid-fever/php/surveillance/annual-summary-2019.html		 all 14 pages (CSV)
Button has accessible name [sia-r12] n/a 12 80 /nchs/nvss/facility-worksheets-guide/27.htm
/nchs/nvss/facility-worksheets-guide/08.htm
/nchs/nvss/facility-worksheets-guide/40.htm		 all 12 pages (CSV)
Table cell has header [sia-r77] n/a 11 9349 /mmwr/preview/mmwrhtml/mm6029md.htm
/mmwr/preview/mmwrhtml/mm5903a3.htm
/fluview/surveillance/2025-week-44.html		 all 11 pages (CSV)
Element has required aria-owns [sia-r46] n/a 8 79 /growth-chart-training/hcp/computer-programs/sas.html
/pcd/issues/2020/20_0025.htm
/asthma/nhis/2012/table1-2.htm		 all 8 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 6 15 /tobacco/campaign/tips/diseases/dual-tobacco-use.html
/mmwr/preview/mmwrhtml/mm59e0803a1.htm
/tobacco/campaign/tips/spanish/acerca/index.html		 all 6 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 5 5 /hepatitis-surveillance-2021/hepatitis-b/figure-2-4.html
/hepatitis/php/npr-2024/hep-c-reduce-deaths-aian.html
/hepatitis-surveillance-2021/hepatitis-c/figure-3-6.html		 all 5 pages (CSV)
Form field error is identified and described [sia-r75] n/a 4 63 /mmwr/preview/mmwrhtml/mm5910a4.htm
/mmwr/preview/mmwrhtml/mm6146a4.htm
/mmwr/preview/mmwrhtml/mm5915a6.htm		 all 4 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 4 17 /pcd/collections/GIS_Covid-19_Collection.htm
/pcd/issues/2007/oct/toc.htm
/nchs/injury.htm		 all 4 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 4 12 /mmwr/cme/serial_conted.html
/tobacco/campaign/tips/diseases/dual-tobacco-use.html
/tb/statistics/reports/2022/risk_factors.htm		 all 4 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 3 3 /flu/professionals/vaccination
/wtc/administration.html
/wtc/contracts.html		 all 3 pages (CSV)
Element role is consistent with ARIA landmark [sia-r72] n/a 3 3 /nchs/covid19/technical-linkage.htm
/nchs/covid19/namcs/experiences.htm
/nchs/covid19/nhcs/intubation-ventilator-use.htm		 all 3 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 2 14 /flu-vaccines-work/php/effectiveness-studies/2022-2023.html
/brfss/acbs/2023/prevalence_tables/table1_LLCP.html		 all 2 pages (CSV)
sia-r84 n/a 2 3 /healthcare-associated-infections/hcp/cleaning-global/procedures.html
/hepatitis-surveillance-2023/about/technical-notes.html		 all 2 pages (CSV)
aria-hidden element does not contain focusable elements [sia-r17] n/a 1 4 /pcd/collections/index.htm all 1 pages (CSV)
sia-r76 n/a 1 3 /nchhstp/priorities/viral-hepatitis-prevention.html all 1 pages (CSV)
Element in required WAI-ARIA context role [sia-r42] n/a 1 2 /monkeypox/php/laboratories/reporting-test-results.html all 1 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 1 1 /mmwr/preview/mmwrhtml/rr5803a1.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 (17239 raw engine findings → 16409 unique).

Unique issues (rule × page)
16409
Caught by both engines
830 highest confidence
axe only
7559
Alfa only
8020
10 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-W30, by pages affected.
IssuePagesRule references
Elements must only use supported ARIA attributes696axe aria-allowed-attr · Alfa sia-r18 · ACT 5c01ea
Images must have alternative text591axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute563axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Links must have discernible text239axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels189axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty22axe empty-heading · Alfa sia-r64 · ACT ffd0e9
ARIA commands must have an accessible name19axe aria-command-name · Alfa sia-r12 · ACT 97a4e1
Certain ARIA roles must contain particular children6axe aria-required-children · Alfa sia-r42 · ACT ff89c9
Table cell headers attributes must refer to other <th> elements in the same table4axe td-headers-attr · Alfa sia-r45 · ACT a25f45
ARIA hidden element must not be focusable or contain focusable elements1axe aria-hidden-focus · Alfa sia-r17 · ACT 6cfa84