vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W34

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

Training priorities

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

SCCriterionPagesRulesNotes
1.4.3 Contrast (Minimum) 852 2
1.1.1 Non-text Content (images, icons) 788 2
3.1.1 Language of Page 777 2
2.5.5 WCAG 2.5.5 732 1
1.4.6 WCAG 1.4.6 616 1

Next 10 actions

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

Top 10 clustered component fixes for this week.
ClusterSeverityPagesWho it affectsHow to fixEvidenceDecision
<html> element must have a lang attribute · unattributed component
Fix one place, resolve ~621 finding(s) on 621 page(s).
XPath / selector: html
<html>
Serious 621 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~155 finding(s) on 155 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="插入電子郵件" value="插入電子郵件" onfocus="this.value=''">
Serious 155 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 ~685 finding(s) on 685 page(s).
XPath / selector: html
<html>
Moderate 685 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~156 finding(s) on 156 page(s).
XPath / selector: <html>
Moderate 156 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~118 finding(s) on 118 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--content">
Moderate 118 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Form elements must have labels · unattributed component
Fix one place, resolve ~160 finding(s) on 160 page(s).
XPath / selector: #searchBox
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
Critical 160 Without vision, Limited vision, Limited manipulation/strength Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~159 finding(s) on 159 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
Moderate 159 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 ~344 finding(s) on 344 page(s).
XPath / selector: @aria-label="Official website of the United States government"
Moderate 344 Requires manual testing. Only use ARIA states/properties that are allowed on this element/role. pages (CSV)
Obsolete <big> element (use CSS) · unattributed component
Fix one place, resolve ~66 finding(s) on 48 page(s).
XPath / selector: big
<big><strong>Disclaimer</strong></big>
Moderate 48 Requires manual testing. Not captured by automated scan — requires manual testing. pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) c · unattributed component
Fix one place, resolve ~802 finding(s) on 802 page(s).
XPath / selector: .page-right-rail__static
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
Moderate 802 Requires manual testing. When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. "Primary" and "Footer" navigation) so screen-reader users can tell them apart. pages (CSV)

Bug reports

34 issue type(s) are shown by default out of 76 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 6 critical, 19 serious, 48 moderate, 3 minor. By WCAG category: 34 WCAG 2.0 A, 5 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 12 Best Practice, 18 Undetermined. Ordered by severity, key-page impact, WCAG level, and prevalence. Following accessibility bug-reporting best practices. Download: Markdown · JSON (full archive) · JSON (AI diagnostic) · CSV (all findings) · Priority pages CSV · Priority pages JSON.

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

The 50 highest-priority findings are shown in full; 26 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

6 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.

Link to this finding Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 628/3332 pages · 6790 instances Likely template
Bug ID
VS-daa4092f
Pattern ID
VS-9074b4dd
Combined ID
VS-daa4092f (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
img[height="8"][alt=" "][width="140"]
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Images must have alternative text. Detected by axe-core rule image-alt on 628 of 3332 scanned pages (6790 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/jan/06_0153_zht.htm.
  2. Locate the element: img[height="8"][alt=" "][width="140"]
  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 628 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe html-has-lang WCAG 2.0 A <html> element must have a lang attribute (WCAG 3.1.1) 621/3332 pages · 621 instances Likely template
Bug ID
VS-15c4f6ba
Pattern ID
VS-c126b6a6
Combined ID
VS-15c4f6ba (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-W34 (11 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 621 of 3332 scanned pages (621 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/jan/06_0153_zht.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 621 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 613/3332 pages · 940 instances Likely template
Bug ID
VS-5f7ec93d
Pattern ID
VS-be8d563e
Combined ID
VS-5f7ec93d (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
font
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 613 of 3332 scanned pages (940 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6017a10.htm?s_cid=mm6017a10_w.
  2. Locate the element: font
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 613 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 252/3332 pages · 596 instances Likely template
Bug ID
VS-4f8efdc2
Pattern ID
VS-e9fe47ac
Combined ID
VS-4f8efdc2 (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-W34 (11 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 252 of 3332 scanned pages (596 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/jan/06_0153_zht.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 252 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Critical axe label WCAG 2.0 A Form elements must have labels (WCAG 4.1.2) 174/3332 pages · 174 instances Likely template
Bug ID
VS-814682ad
Pattern ID
VS-fafffee0
Combined ID
VS-814682ad (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-W34 (11 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 174 of 3332 scanned pages (174 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6017a10.htm?s_cid=mm6017a10_w.
  2. Locate the element: #searchBox
  3. Confirm the axe-core finding for rule label against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

…and more — all 174 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe link-in-text-block WCAG 2.0 A Links must be distinguishable without relying on color (WCAG 1.4.1) 73/3332 pages · 86 instances Likely template
Bug ID
VS-e1a05627
Pattern ID
VS-8ade3360
Combined ID
VS-e1a05627 (pattern VS-8ade3360) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.4.1 Use of Color (Level A, WCAG 2.0)
XPath / selector
.all-pages
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 73 of 3332 scanned pages (86 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/suicide/playbook/cost-considerations.html.
  2. Locate the element: .all-pages
  3. Confirm the axe-core finding for rule link-in-text-block against WCAG 1.4.1 Use of Color.

Impact

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

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

Affected pages

…and more — all 73 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

Link to this finding Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 40/3332 pages · 49 instances Likely template
Bug ID
VS-b40d3a17
Pattern ID
VS-3f76c7ea
Combined ID
VS-b40d3a17 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
div[data-section="cdc_generic_section_1"] > .dfe-block.dfe-block--cdcmodule > .cdc-youtube-embed > iframe
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/Xmd_ddlzi_k?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 40 of 3332 scanned pages (49 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/healthy-pets/educational-materials/videos.html.
  2. Locate the element: div[data-section="cdc_generic_section_1"] > .dfe-block.dfe-block--cdcmodule > .cdc-youtube-embed > 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 40 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.

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

Link to this finding Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 37/3332 pages · 47 instances Likely template
Bug ID
VS-30c557ef
Pattern ID
VS-a0bdbdf6
Combined ID
VS-30c557ef (pattern VS-a0bdbdf6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
ol
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<ol>

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 37 of 3332 scanned pages (47 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5342a3.htm.
  2. Locate the element: ol
  3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 37 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

Link to this finding Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 22/3332 pages · 40 instances Likely template
Bug ID
VS-a17a879e
Pattern ID
VS-c613c153
Combined ID
VS-a17a879e (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
.dfe-block--width-wide.dfe-block.dfe-block--cdcmodule:nth-child(8) > .dfe-block__inner > .cdc-textblock > div:nth-child(2)
History
first seen 2026-W24, last seen 2026-W34 (11 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 22 of 3332 scanned pages (40 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vaccines/acip/recs/grade/PCV21-non-risk-based-adults-19-49.html.
  2. Locate the element: .dfe-block--width-wide.dfe-block.dfe-block--cdcmodule:nth-child(8) > .dfe-block__inner > .cdc-textblock > div:nth-child(2)
  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

Link to this finding 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) 19/3332 pages · 25 instances Likely template
Bug ID
VS-72656a5f
Pattern ID
VS-07ba3b17
Combined ID
VS-72656a5f (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
div[role="tablist"]:nth-child(1) > div[role="tabpanel"]:nth-child(2) > .opt-in.table-bordered.table-sm
History
first seen 2026-W25, last seen 2026-W34 (10 wk)

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

<table class="opt-in table table-bordered table-sm" border="1">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 19 of 3332 scanned pages (25 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/dpdx/diagnosticprocedures/stool/morphcomp.html.
  2. Locate the element: div[role="tablist"]:nth-child(1) > div[role="tabpanel"]:nth-child(2) > .opt-in.table-bordered.table-sm
  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

Link to this finding Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 9/3332 pages · 22 instances
Bug ID
VS-7f95f7d4
Pattern ID
VS-fab92378
Combined ID
VS-7f95f7d4 (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
#medicine
History
first seen 2026-W25, last seen 2026-W34 (10 wk)

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

<select id="medicine" onchange="window.location = this.options[this.selectedIndex].value;">

Description

Select element must have an accessible name. Detected by axe-core rule select-name on 9 of 3332 scanned pages (22 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/como-usar-medicamentos/inhalador-oral-de-nicotina.html.
  2. Locate the element: #medicine
  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

Link to this finding Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 7/3332 pages · 8 instances
Bug ID
VS-e648d3e2
Pattern ID
VS-4b45acfe
Combined ID
VS-e648d3e2 (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-W34 (10 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 7 of 3332 scanned pages (8 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5453a1.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

Link to this finding Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 6/3332 pages · 72 instances
Bug ID
VS-af63ae4b
Pattern ID
VS-5c82bd60
Combined ID
VS-af63ae4b (pattern VS-5c82bd60) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W34 (11 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 6 of 3332 scanned pages (72 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/sudden-infant-death/data-research/data/suid-rates-by-race-ethnicity.html.
  2. Locate the element: th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 5/3332 pages · 26 instances
Bug ID
VS-0fb66a73
Pattern ID
VS-6175596b
Combined ID
VS-0fb66a73 (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
div[data-section="cdc_generic_section_3"] > .table.dfe-table.table-no-header:nth-child(5) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > li
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 5 of 3332 scanned pages (26 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/zika/es/travel/recomendaciones-para-las-personas-que-viajan-y-las-personas-que-viven-en-el-extranjero.html.
  2. Locate the element: div[data-section="cdc_generic_section_3"] > .table.dfe-table.table-no-header:nth-child(5) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(1) > .table-col[role="cell"][data-col="2"] > li
  3. Confirm the axe-core finding for rule listitem against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

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

Link to this finding Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 5/3332 pages · 19 instances
Bug ID
VS-d7d80039
Pattern ID
VS-58301a87
Combined ID
VS-d7d80039 (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-11
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<div class="card-header h4 bg-white rounded-0" role="tab" id="acc-header-11" href="#acc-panel-11" data-toggle="collapse" data-parent="#accordion-11" aria-controls="acc-panel-11" aria-expanded="true">

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 5 of 3332 scanned pages (19 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tobacco/campaign/tips/quit-smoking/quitline/top-10-questions-people-ask-about-quitlines.html.
  2. Locate the element: #acc-header-11
  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

Link to this finding Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 4/3332 pages · 8 instances
Bug ID
VS-a802b7c8
Pattern ID
VS-9429bb8d
Combined ID
VS-a802b7c8 (pattern VS-9429bb8d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
#accordion-11
History
first seen 2026-W25, last seen 2026-W34 (9 wk)

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

<div class="accordion indicator-plus accordion-white mb3" id="accordion-11" role="tablist">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 4 of 3332 scanned pages (8 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tobacco/campaign/tips/quit-smoking/quitline/top-10-questions-people-ask-about-quitlines.html.
  2. Locate the element: #accordion-11
  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

Link to this finding Serious axe aria-prohibited-attr WCAG 2.0 A Elements must only use permitted ARIA attributes (WCAG 4.1.2) 4/3332 pages · 4 instances
Bug ID
VS-659983e6
Pattern ID
VS-ebb1c464
Combined ID
VS-659983e6 (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
#UNIQUE3056890ef409a144
History
first seen 2026-W28, last seen 2026-W34 (7 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="UNIQUE3056890ef409a144" aria-label="Carousel">

Description

Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 4 of 3332 scanned pages (4 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/stophivtogether/hiv-testing/index.html?s_cid=so_togetherprovidertk0045.
  2. Locate the element: #UNIQUE3056890ef409a144
  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

Link to this finding Critical axe area-alt WCAG 2.0 A Active <area> elements must have alternative text (WCAG 2.4.4) 1/3332 pages · 6 instances Likely content
Bug ID
VS-b957b4a8
Pattern ID
VS-4e469a59
Combined ID
VS-b957b4a8 (pattern VS-4e469a59) — 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
area[onmouseover="stm(Text[1],Style[1])"]
History
first seen 2026-W28, last seen 2026-W34 (2 wk)

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

<area onmouseover="stm(Text[1],Style[1])" onmouseout="htm()" shape="polygon" href="#" target="_self" coords="290,76,243,67,243,45,336,45,336,67">

Description

Active <area> elements must have alternative text. Detected by axe-core rule area-alt on 1 of 3332 scanned pages (6 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2006/jan/05_0131.htm.
  2. Locate the element: area[onmouseover="stm(Text[1],Style[1])"]
  3. Confirm the axe-core finding for rule area-alt against WCAG 2.4.4 Link Purpose (In Context).

Impact

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

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

Affected pages

Testing environment

Automated: 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/area-alt?application=axeAPI

Link to this finding Critical axe aria-allowed-attr WCAG 2.0 A Elements must only use supported ARIA attributes (WCAG 4.1.2) 1/3332 pages · 1 instances Likely content
Bug ID
VS-e82533cf
Pattern ID
VS-1467ea8a
Combined ID
VS-e82533cf (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
.fieldset--checkbox-group
History
first seen 2026-W25, last seen 2026-W34 (7 wk)

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

<fieldset class="fieldset--checkbox-group" aria-required="true">

Description

Elements must only use supported ARIA attributes. Detected by axe-core rule aria-allowed-attr on 1 of 3332 scanned pages (1 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nhsn/facadmin.
  2. Locate the element: .fieldset--checkbox-group
  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

Link to this finding Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 1/3332 pages · 3 instances Likely content
Bug ID
VS-7a81f398
Pattern ID
VS-dd1c019f
Combined ID
VS-7a81f398 (pattern VS-dd1c019f) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
3.1.2 Language of Parts (Level AA, WCAG 2.0)
XPath / selector
div[data-post="1937_2504"] > .dfe-curated-link__download.has-content > .download-container > .cdc-block-link[lang="__"][aria-label="Download"]
History
first seen 2026-W24, last seen 2026-W34 (7 wk)

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

<a lang="__" class="cdc-block-link" href="/flu-resources/media/pdfs/2024/08/covercough_school8-5x11_khm.pdf" aria-label="Download" download="covercough_school8-5x11_khm.pdf" target="_blank">

Description

lang attribute must have a valid value. Detected by axe-core rule valid-lang on 1 of 3332 scanned pages (3 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/flu-resources/php/resources/cover-your-cough-community-flyer.html.
  2. Locate the element: div[data-post="1937_2504"] > .dfe-curated-link__download.has-content > .download-container > .cdc-block-link[lang="__"][aria-label="Download"]
  3. Confirm the axe-core finding for rule valid-lang against WCAG 3.1.2 Language of Parts.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Link to this finding Serious axe aria-input-field-name WCAG 2.0 A ARIA input fields must have an accessible name (WCAG 4.1.2) 1/3332 pages · 2 instances Likely content
Bug ID
VS-b6a822b3
Pattern ID
VS-0841abc2
Combined ID
VS-b6a822b3 (pattern VS-0841abc2) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
.rc-slider-handle-1
History
first seen 2026-W25, last seen 2026-W34 (6 wk)

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

<div tabindex="0" class="rc-slider-handle rc-slider-handle-1" role="slider" aria-valuemin="1" aria-valuemax="89" aria-valuenow="49" aria-disabled="false" style="left: 54.5455%; right: auto; transform:

Description

ARIA input fields must have an accessible name. Detected by axe-core rule aria-input-field-name on 1 of 3332 scanned pages (2 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Link to this finding Serious axe document-title WCAG 2.0 A Documents must have <title> element to aid in navigation (WCAG 2.4.2) 1/3332 pages · 1 instances Likely content
Bug ID
VS-71571375
Pattern ID
VS-c80d5faa
Combined ID
VS-71571375 (pattern VS-c80d5faa) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.2 Page Titled (Level A, WCAG 2.0)
XPath / selector
html
History
first seen 2026-W25, last seen 2026-W34 (6 wk)

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

<html><head></head><body></body></html>

Description

Documents must have <title> element to aid in navigation. Detected by axe-core rule document-title on 1 of 3332 scanned pages (1 instances).

Steps to reproduce

  1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/viral-hemorrhagic-fevers/hcp/diagnosis-testing/evaluating-an-ill-person-for-vhf.html.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule document-title against WCAG 2.4.2 Page Titled.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Link to this finding Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 2957/3332 pages · 52946 instances Likely template
Bug ID
VS-5ee20e15
Pattern ID
VS-f18df681
Combined ID
VS-5ee20e15 (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.cdc-site-gov-notice
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 2957 of 3332 scanned pages (52946 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/finance/conference-report/2024-spending-report.html.
  2. Locate the element: .cdc-site-gov-notice
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 2957 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

Link to this finding Serious axe label-title-only Best Practice Form elements should have a visible label (WCAG criterion undetermined) 155/3332 pages · 155 instances Likely template
Bug ID
VS-6a5a6b06
Pattern ID
VS-33841929
Combined ID
VS-6a5a6b06 (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-W34 (11 wk)

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

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

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 155 of 3332 scanned pages (155 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2008/jan/06_0153_zht.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 155 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

Link to this finding Serious axe tabindex Best Practice Elements should not have tabindex greater than zero (WCAG criterion undetermined) 1/3332 pages · 2 instances Likely content
Bug ID
VS-7e958f13
Pattern ID
VS-7430f84c
Combined ID
VS-7e958f13 (pattern VS-7430f84c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#Slide62516accStr2
History
first seen 2026-W24, last seen 2026-W34 (5 wk)

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

<div id="Slide62516accStr2" tabindex="2400" style="transform: translate3d(0px, 0px, 0px); opacity: 0; width: 0px; height: 0px; left: -1999px; position: fixed;"><p style="transform: translate3d(0px, 0p

Description

Elements should not have tabindex greater than zero. Detected by axe-core rule tabindex on 1 of 3332 scanned pages (2 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/orr/ipp/etool-2023-2.
  2. Locate the element: #Slide62516accStr2
  3. Confirm the axe-core finding for rule tabindex.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

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

Link to this finding 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) 271/3332 pages · 2634 instances Likely template
Bug ID
VS-8ceac419
Pattern ID
VS-179ad9b3
Combined ID
VS-8ceac419 (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-W34 (11 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 271 of 3332 scanned pages (2634 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 271 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

Link to this finding Moderate alfa sia-r69 WCAG 2.0 AA Text has sufficient color contrast (Enhanced) (WCAG 1.4.3) 239/3332 pages · 1668 instances Likely template
Bug ID
VS-f3870e7e
Pattern ID
VS-f7e99f4b
Combined ID
VS-f3870e7e (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-W34 (11 wk)

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 239 of 3332 scanned pages (1668 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/heartland-virus/prevention/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 239 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

Link to this finding Moderate alfa sia-r2 WCAG 2.0 A Image has accessible name (WCAG 1.1.1) 160/3332 pages · 1725 instances Likely template
Bug ID
VS-2be68f2a
Pattern ID
VS-a24eaa8c
Combined ID
VS-2be68f2a (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-W34 (11 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 160 of 3332 scanned pages (1725 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 160 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

Link to this finding Moderate alfa sia-r4 WCAG 2.0 A Document has a valid lang attribute (WCAG 3.1.1) 156/3332 pages · 156 instances Likely template
Bug ID
VS-cf047437
Pattern ID
VS-7a0e5645
Combined ID
VS-cf047437 (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-W34 (11 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 156 of 3332 scanned pages (156 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 156 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

Link to this finding Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 76/3332 pages · 843 instances Likely template
Bug ID
VS-9e73495f
Pattern ID
VS-d6097011
Combined ID
VS-9e73495f (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-W34 (11 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 76 of 3332 scanned pages (843 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/lead-prevention/community-stories/madison-county-mo.html.
  2. Locate the element: <ul>
  3. Confirm the Siteimprove Alfa finding for rule sia-r68 against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 76 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

Link to this finding Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 75/3332 pages · 139 instances Likely template
Bug ID
VS-3d39ded1
Pattern ID
VS-f7dba940
Combined ID
VS-3d39ded1 (pattern VS-f7dba940) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.1 A
Obligation
required
Handling
review
WCAG SC
2.5.3 Label in Name (Level A, WCAG 2.1)
XPath / selector
<a href="/ncird/index.html" class="cdc-footer__super-title" aria-label="National Center for Immunization and Respiratory Diseases">
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 75 of 3332 scanned pages (139 instances).

Steps to reproduce

  1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/ncird/press-form/index.html.
  2. Locate the element: <a href="/ncird/index.html" class="cdc-footer__super-title" aria-label="National Center for Immunization and Respiratory Diseases">
  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 75 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

Link to this finding Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 69/3332 pages · 231 instances Likely template
Bug ID
VS-64b3744d
Pattern ID
VS-28ebd979
Combined ID
VS-64b3744d (pattern VS-28ebd979) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
<a href="http://www.cdc.gov/">
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 69 of 3332 scanned pages (231 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/mar/09_0095_es.htm.
  2. Locate the element: <a href="http://www.cdc.gov/">
  3. Confirm the Siteimprove Alfa finding for rule sia-r11 against WCAG 2.4.4 Link Purpose (In Context).

Impact

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

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

Affected pages

…and more — all 69 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

Link to this finding Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 45/3332 pages · 62 instances Likely template
Bug ID
VS-8e9a1f8c
Pattern ID
VS-a48e6078
Combined ID
VS-8e9a1f8c (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-W34 (11 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 45 of 3332 scanned pages (62 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6115a3.htm?s_cid=mm6115a3_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 45 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

Link to this finding Moderate alfa sia-r77 WCAG 2.0 A Table cell has header (WCAG 1.3.1) 10/3332 pages · 5372 instances · possible duplicate Likely template
Bug ID
VS-2cb2508b
Pattern ID
VS-3f067795
Combined ID
VS-2cb2508b (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-W34 (11 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-0fb66a73 (pattern VS-6175596b). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Table cell has header. Detected by Siteimprove Alfa rule sia-r77 on 10 of 3332 scanned pages (5372 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6041md.htm?s_cid=mm6041md_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

Link to this finding Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 962/3332 pages · 1364 instances Likely template
Bug ID
VS-c73ace8a
Pattern ID
VS-d25f622d
Combined ID
VS-c73ace8a (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
.bg-white.card-body > h5
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<h5>Altmetric:</h5>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 962 of 3332 scanned pages (1364 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/72/ss/ss7208a1.htm.
  2. Locate the element: .bg-white.card-body > h5
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 962 pages (CSV).

Testing environment

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

Suggested fix

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

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

Link to this finding Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 846/3332 pages · 846 instances Likely template
Bug ID
VS-f3ea4fe3
Pattern ID
VS-d5d82446
Combined ID
VS-f3ea4fe3 (pattern VS-d5d82446) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#js
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 846 of 3332 scanned pages (846 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6017a10.htm?s_cid=mm6017a10_w.
  2. Locate the element: #js
  3. Confirm the axe-core finding for rule landmark-one-main.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 846 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

Link to this finding Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 814/3332 pages · 854 instances Likely template
Bug ID
VS-da188de9
Pattern ID
VS-8806389c
Combined ID
VS-da188de9 (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-W34 (11 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 814 of 3332 scanned pages (854 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/finance/conference-report/2024-spending-report.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 814 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

Link to this finding Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 732/3332 pages · 22156 instances Likely template
Bug ID
VS-4f3dc752
Pattern ID
VS-cb53cc4d
Combined ID
VS-4f3dc752 (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-W34 (11 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 732 of 3332 scanned pages (22156 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 732 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

Link to this finding Moderate alfa sia-r66 WCAG 2.x AAA Text has enhanced contrast (WCAG 1.4.6) 616/3332 pages · 18829 instances Likely template
Bug ID
VS-58afd9fd
Pattern ID
VS-646b1e0b
Combined ID
VS-58afd9fd (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-W34 (11 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 616 of 3332 scanned pages (18829 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/heartland-virus/prevention/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 616 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

Link to this finding Moderate alfa sia-r57 Undetermined Scrolling content can be accessed by keyboard (WCAG criterion undetermined) 523/3332 pages · 7807 instances Likely template
Bug ID
VS-6083be58
Pattern ID
VS-c18be945
Combined ID
VS-6083be58 (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-W34 (11 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 523 of 3332 scanned pages (7807 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/heartland-virus/prevention/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 523 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

Link to this finding Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 371/3332 pages · 374 instances Likely template
Bug ID
VS-82d17203
Pattern ID
VS-e05344b9
Combined ID
VS-82d17203 (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-W34 (11 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 371 of 3332 scanned pages (374 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/heartland-virus/prevention/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 371 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

Link to this finding Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 302/3332 pages · 1931 instances Likely template
Bug ID
VS-f7d28dec
Pattern ID
VS-fbf54eba
Combined ID
VS-f7d28dec (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-W34 (11 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 302 of 3332 scanned pages (1931 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 302 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

Link to this finding Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 251/3332 pages · 42107 instances Likely template
Bug ID
VS-8b1be1a0
Pattern ID
VS-2208081b
Combined ID
VS-8b1be1a0 (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-W34 (11 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 251 of 3332 scanned pages (42107 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 251 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

Link to this finding Moderate alfa sia-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 234/3332 pages · 321 instances Likely template
Bug ID
VS-e58f18de
Pattern ID
VS-f054f4a4
Combined ID
VS-e58f18de (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-W34 (11 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 234 of 3332 scanned pages (321 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 234 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

Link to this finding Moderate alfa sia-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 189/3332 pages · 189 instances Likely template
Bug ID
VS-8007b2bd
Pattern ID
VS-3d033717
Combined ID
VS-8007b2bd (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-W34 (11 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 189 of 3332 scanned pages (189 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4908a1.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 189 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

Link to this finding Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 146/3332 pages · 170 instances Likely template
Bug ID
VS-c02c3e45
Pattern ID
VS-4fac2f41
Combined ID
VS-c02c3e45 (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
.btn-srch
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

<button role="search" type="submit" class="btn-srch" aria-label="Search" style="right: -8px;"><i class="fas fa-search"></i></button>

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 146 of 3332 scanned pages (170 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/petitions.html.
  2. Locate the element: .btn-srch
  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 146 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

Link to this finding Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 118/3332 pages · 118 instances Likely template
Bug ID
VS-1530437c
Pattern ID
VS-fa44f293
Combined ID
VS-1530437c (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-W34 (11 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 118 of 3332 scanned pages (118 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vams/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 118 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

Link to this finding Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 102/3332 pages · 12044 instances Likely template
Bug ID
VS-8ee1d1a8
Pattern ID
VS-04a9d28c
Combined ID
VS-8ee1d1a8 (pattern VS-04a9d28c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Presentational attribute (use CSS) [presentational-attr]
XPath / selector
body
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 102 of 3332 scanned pages (12044 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5342a3.htm.
  2. Locate the element: body
  3. Confirm the deprecated-html finding for rule presentational-attr.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 102 pages (CSV).

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

Link to this finding Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 71/3332 pages · 71 instances Likely template
Bug ID
VS-9a1fc99d
Pattern ID
VS-7118fead
Combined ID
VS-9a1fc99d (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":"-//W3C//
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 71 of 3332 scanned pages (71 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6115a3.htm?s_cid=mm6115a3_w.
  2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
  3. Confirm the Siteimprove Alfa finding for rule sia-r61.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 71 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

Link to this finding Moderate deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 64/3332 pages · 523 instances Likely template
Bug ID
VS-f2139b75
Pattern ID
VS-91d2294a
Combined ID
VS-f2139b75 (pattern VS-91d2294a) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Obsolete <font> element (use CSS) [font-element]
XPath / selector
font
History
first seen 2026-W24, last seen 2026-W34 (11 wk)

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

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

Description

Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 64 of 3332 scanned pages (523 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5342a3.htm.
  2. Locate the element: font
  3. Confirm the deprecated-html finding for rule font-element.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 64 pages (CSV).

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

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

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

SeverityFindingWCAG categoryPages
Minor Table header text should not be empty (WCAG criterion undetermined) [empty-table-header] Best Practice 57
Moderate Obsolete <big> element (use CSS) (WCAG criterion undetermined) [big-element] Undetermined 48
Moderate Table header has scope (WCAG criterion undetermined) [sia-r78] Undetermined 47
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 19
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 18
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 18
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 16
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 16
Minor Headings should not be empty (WCAG criterion undetermined) [empty-heading] Best Practice 15
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] Undetermined 9
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 6
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 6
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 5
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 5
Moderate Element role is consistent with ARIA landmark (WCAG criterion undetermined) [sia-r72] Undetermined 4
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 3
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 2
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 2
Moderate Keyboard (WCAG 2.1.1) [sia-r84] WCAG 2.0 A 2
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 1
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 1
Moderate Document has a title element (WCAG 2.4.2) [sia-r1] WCAG 2.0 A 1
Moderate iframe element is not empty (WCAG 1.4.8) [sia-r71] WCAG 2.x AAA 1
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 1
Moderate Text is not too small to read (WCAG 1.4.4) [sia-r47] WCAG 2.0 AA 1
Moderate Zooming and scaling must not be disabled (WCAG 1.4.4) [meta-viewport] WCAG 2.0 AA 1

Deque axe-core findings

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

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

axe-core rules failing in 2026-W34, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 2957 52946 /finance/conference-report/2024-spending-report.html
/vams/site.html
/mmwr/volumes/72/ss/ss7208a1.htm
all 2957 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 962 1364 /mmwr/volumes/72/ss/ss7208a1.htm
/pcd/issues/2008/jan/06_0153_zht.htm
/mmwr/preview/mmwrhtml/mm4908a1.htm
all 962 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 846 846 /mmwr/preview/mmwrhtml/mm6017a10.htm
/pcd/issues/2008/jan/06_0153_zht.htm
/mmwr/preview/mmwrhtml/mm4908a1.htm
all 846 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 814 854 /finance/conference-report/2024-spending-report.html
/overdose-prevention/php/od2a/puerto-rico.html
/mental-health/es/living-with/manejo-del-estres.html
all 814 pages (CSV)
Images must have alternative text [image-alt] critical 628 6790 /pcd/issues/2008/jan/06_0153_zht.htm
/mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/mm5739a1.htm
all 628 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 621 621 /pcd/issues/2008/jan/06_0153_zht.htm
/mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/mm5739a1.htm
all 621 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 613 940 /mmwr/preview/mmwrhtml/mm6017a10.htm
/mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/mm5739a1.htm
all 613 pages (CSV)
Links must have discernible text [link-name] serious 252 596 /pcd/issues/2008/jan/06_0153_zht.htm
/mmwr/preview/ind1996_ss.html
/pcd/issues/2006/oct/06_0032_zht.htm
all 252 pages (CSV)
Form elements must have labels [label] critical 174 174 /mmwr/preview/mmwrhtml/mm6017a10.htm
/mmwr/preview/ind1996_ss.html
/mmwr/preview/mmwrhtml/mm6115a3.htm
all 174 pages (CSV)
Form elements should have a visible label [label-title-only] serious 155 155 /pcd/issues/2008/jan/06_0153_zht.htm
/pcd/issues/2006/oct/06_0032_zht.htm
/PCD/issues/2007/apr/06_0085_es.htm
all 155 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 146 170 /wtc/petitions.html
/spanish/niosh/docs/2007-175_sp
/niosh/docs/mining/works/coversheet354.html
all 146 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 118 118 /vams/site.html
/flu/weekly/weeklyarchives2025-2026/data/senAllregt26.html
/phap/site.html
all 118 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 73 86 /suicide/playbook/cost-considerations.html
/vaccines/hcp/storage-handling/equipment.html
/infection-control/hcp/healthcare-personnel-epidemiology-control/pregnant-hcp.html
all 73 pages (CSV)
Table header text should not be empty [empty-table-header] minor 57 271 /asthma/nhis/2014/table6-1.htm
/mmwr/preview/mmwrhtml/mm6041md.htm
/mmwr/preview/mmwrhtml/ss6015a1.htm
all 57 pages (CSV)
Frames must have an accessible name [frame-title] serious 40 49 /healthy-pets/educational-materials/videos.html
/natural-disasters/psa-toolkit/stay-safe-during-a-tornado.html
/prediabetes/risktest/index.html
all 40 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 37 47 /mmwr/preview/mmwrhtml/mm5342a3.htm
/mmwr/preview/mmwrhtml/00018860.htm
/mmwr/preview/mmwrhtml/00017393.htm
all 37 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 22 40 /vaccines/acip/recs/grade/PCV21-non-risk-based-adults-19-49.html
/nchs/data/hestat/hestat111.htm
/nchs/updates/feature-1.html
all 22 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 19 25 /dpdx/diagnosticprocedures/stool/morphcomp.html
/nchs/products/databriefs/db96.htm
/brfss/acbs/2012/prevalence_tables/table8b_LLCP.html
all 19 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 18 20 /pcd/issues/2012/11_0144_es.htm
/pcd/issues/2012/11_0102_es.htm
/flu/protect/preventing.htm
all 18 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 16 144 /fluview/surveillance/2025-week-23.html
/acip/evidence-to-recommendations/CYD-TDV-dengue-vaccine-etr.html
/fluview/surveillance/2025-week-34.html
all 16 pages (CSV)
Headings should not be empty [empty-heading] minor 15 15 /mmwr/preview/mmwrhtml/mm5342a3.htm
/mmwr/preview/mmwrhtml/mm5242a6.htm
/mmwr/preview/mmwrhtml/mm5314a2.htm
all 15 pages (CSV)
Select element must have an accessible name [select-name] critical 9 22 /tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/como-usar-medicamentos/inhalador-oral-de-nicotina.html
/tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/como-usar-medicamentos/tabletas-de-nicotina.html
/tobacco/campaign/tips/quit-smoking/quit-smoking-medications/how-to-use-quit-smoking-medicines/index.html
all 9 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 7 8 /mmwr/preview/mmwrhtml/mm5453a1.htm
/mmwr/preview/mmwrhtml/mm5634a5.htm
/mmwR/preview/mmwrhtml/rr5606a1.htm
all 7 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 6 72 /sudden-infant-death/data-research/data/suid-rates-by-race-ethnicity.html
/hepatitis/php/npr-2023/hep-b-reduce-deaths-api.html
/hepatitis/php/npr-2025/hep-c-reduce-infections-pwid.html
all 6 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 5 26 /zika/es/travel/recomendaciones-para-las-personas-que-viajan-y-las-personas-que-viven-en-el-extranjero.html
/control-legionella/php/toolkit/routine-testing-module.html
/clean-hands/hcp/clinical-safety
all 5 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 5 19 /tobacco/campaign/tips/quit-smoking/quitline/top-10-questions-people-ask-about-quitlines.html
/diabetes/burden-toolkit/state-burden-toolkit-health-burden.html
/stophivtogether/hiv-testing/self-testing.html
all 5 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 4 8 /tobacco/campaign/tips/quit-smoking/quitline/top-10-questions-people-ask-about-quitlines.html
/dpdx/diagnosticprocedures/stool/morphcomp.html
/stophivtogether/hiv-testing/self-testing.html
all 4 pages (CSV)
Elements must only use permitted ARIA attributes [aria-prohibited-attr] serious 4 4 /stophivtogether/hiv-testing/index.html
/stophivtogether/hiv-testing/self-testing.html
/stophivtogether/hiv-stigma/index.html
all 4 pages (CSV)
Active <area> elements must have alternative text [area-alt] critical 1 6 /pcd/issues/2006/jan/05_0131.htm all 1 pages (CSV)
lang attribute must have a valid value [valid-lang] serious 1 3 /flu-resources/php/resources/cover-your-cough-community-flyer.html all 1 pages (CSV)
Elements should not have tabindex greater than zero [tabindex] serious 1 2 /orr/ipp/etool-2023-2 all 1 pages (CSV)
ARIA input fields must have an accessible name [aria-input-field-name] serious 1 2 /overdose-prevention/data-research/facts-stats/dose-dashboard-nonfatal-surveillance-data.html all 1 pages (CSV)
Zooming and scaling must not be disabled [meta-viewport] moderate 1 1 /orr/ipp/etool-2023-2 all 1 pages (CSV)
Elements must only use supported ARIA attributes [aria-allowed-attr] critical 1 1 /nhsn/facadmin all 1 pages (CSV)
Documents must have <title> element to aid in navigation [document-title] serious 1 1 /viral-hemorrhagic-fevers/hcp/diagnosis-testing/evaluating-an-ill-person-for-vhf.html all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (36 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-W34, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 732 22156 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 732 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 616 18829 /heartland-virus/prevention/index.html
/lead-prevention/community-stories/madison-county-mo.html
/lung-cancer/statistics/index.html
all 616 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 523 7807 /heartland-virus/prevention/index.html
/lead-prevention/community-stories/madison-county-mo.html
/lung-cancer/statistics/index.html
all 523 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 371 374 /heartland-virus/prevention/index.html
/lead-prevention/community-stories/madison-county-mo.html
/lung-cancer/statistics/index.html
all 371 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 302 1931 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 302 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 271 2634 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 271 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 251 42107 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 251 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 239 1668 /heartland-virus/prevention/index.html
/lead-prevention/community-stories/madison-county-mo.html
/lung-cancer/statistics/index.html
all 239 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 234 321 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
/mmwr/preview/mmwrhtml/00001877.htm
all 234 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 189 189 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 189 pages (CSV)
Image has accessible name [sia-r2] n/a 160 1725 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 160 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 156 156 /mmwr/preview/mmwrhtml/mm4908a1.htm
/mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/mm5453a1.htm
all 156 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 76 843 /lead-prevention/community-stories/madison-county-mo.html
/diabetes/health-equity/index.html
/diabetes/spanish/living/eatright.html
all 76 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 75 139 /ncird/press-form/index.html
/niosh/docs/2023-108
/diabetes/spanish/living/eatright.html
all 75 pages (CSV)
Form field label is visible [sia-r61] n/a 71 71 /mmwr/preview/mmwrhtml/mm6115a3.htm
/schoolvaxview/index.html
/niosh/ptd/site.html
all 71 pages (CSV)
Link has accessible name [sia-r11] n/a 69 231 /pcd/issues/2010/mar/09_0095_es.htm
/media/releases/2024/s0522-human-case-h5.html
/PCD/issues/2006/apr/05_0087_es.htm
all 69 pages (CSV)
Table header has scope [sia-r78] n/a 47 54 /yellow-book/hcp/health-care-abroad/medical-tourism.html
/niosh/ptd/site.html
/mmwr/volumes/66/wr/mm6642a11.htm
all 47 pages (CSV)
Form field has accessible name [sia-r8] n/a 45 62 /mmwr/preview/mmwrhtml/mm6115a3.htm
/mmwr/preview/mmwrhtml/mm6331a2.htm
/mmwr/preview/mmwrhtml/mm6001a9.htm
all 45 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 19 60 /mmwr/preview/mmwrhtml/00038136.htm
/mmwr/preview/mmwrhtml/00049560.htm
/mmwr/preview/mmwrhtml/00050819.htm
all 19 pages (CSV)
Input purpose can be determined [sia-r60] n/a 16 22 /ncird/press-form/index.html
/mmwr/preview/ind1994_ss.html
/pcd/issues/2013/12_0256.htm
all 16 pages (CSV)
Table cell has header [sia-r77] n/a 10 5372 /mmwr/preview/mmwrhtml/mm6041md.htm
/hepatitis/hbv/perinatalxmtn.htm
/fluview/surveillance/2025-week-41.html
all 10 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 9 9 /flu/weekly/weeklyarchives2025-2026/data/senAllregt26.html
/mmwr/volumes/66/wr/mm6650md.htm
/orr/ipp/etool-2023-2
all 9 pages (CSV)
Element has required aria-owns [sia-r46] n/a 6 10 /asthma/nhis/08/table4-1.htm
/asthma/nhis/2014/table4-2.htm
/asthma/nhis/2012/table4-2.htm
all 6 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 6 6 /flu/weekly/weeklyarchives2025-2026/data/senAllregt26.html
/orr/ipp/etool-2023-2
/flu/weekly/weeklyarchives2023-2024/EIPConditions27.html
all 6 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 5 6 /hepatitis-a/outbreaks/clams-2026/locations.html
/thalassemia/hcp/toolkit/index.html
/overdose-prevention/data-research/facts-stats/opioid-dispensing-rate-maps.html
all 5 pages (CSV)
Element has required owned roles [sia-r64] n/a 5 5 /mmwr/preview/mmwrhtml/mm5242a6.htm
/mmwr/preview/mmwrhtml/mm5314a2.htm
/mmwr/preview/mmwrhtml/mm5350a3.htm
all 5 pages (CSV)
Element role is consistent with ARIA landmark [sia-r72] n/a 4 4 /nchs/covid19/npals/rcc.htm
/nchs/nvss/vsrr/covid19/tech_notes.htm
/nchs/healthy_people/hp2020/foundation-health-measures.htm
all 4 pages (CSV)
Button has accessible name [sia-r12] n/a 3 3 /stophivtogether/clinician-resources/index.html
/nchs/nvss/facility-worksheets-guide/31.htm
/stophivtogether/partnerships/toolkit/older-adults-and-hiv.html
all 3 pages (CSV)
Form field error is identified and described [sia-r75] n/a 2 11 /mmwr/preview/mmwrhtml/rr5910a1.htm
/mmwr/preview/mmwrhtml/mm5916a7.htm
all 2 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 2 5 /nhsn/ltc/weekly-covid-vac/index.html
/mmwr/preview/mmwrhtml/rr5910a1.htm
all 2 pages (CSV)
sia-r84 n/a 2 2 /vams/hcp/resources/healthcare-professional-user-manual.html
/vams/hcp/resources/clinic-administrator-user-manual.html
all 2 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 1 8 /yellow-book/hcp/preparing-international-travelers/travel-health-kits.html all 1 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 1 1 /diabetes/burden-toolkit/state-burden-toolkit-health-burden.html all 1 pages (CSV)
Text is not too small to read [sia-r47] n/a 1 1 /orr/ipp/etool-2023-2 all 1 pages (CSV)
iframe element is not empty [sia-r71] n/a 1 1 /pcd/issues/2010/mar/09_0035.htm all 1 pages (CSV)
Document has a title element [sia-r1] n/a 1 1 /viral-hemorrhagic-fevers/hcp/diagnosis-testing/evaluating-an-ill-person-for-vhf.html 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 (13151 raw engine findings → 12709 unique).

Unique issues (rule × page)
12709
Caught by both engines
438 highest confidence
axe only
8188
Alfa only
4083
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-W34, by pages affected.
IssuePagesRule references
Images must have alternative text628axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute621axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Elements must only use permitted ARIA attributes376axe aria-prohibited-attr · Alfa sia-r18 · ACT 5c01ea
Links must have discernible text252axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels181axe label · Alfa sia-r8 · ACT e086e5
Table cell headers attributes must refer to other <th> elements in the same table19axe td-headers-attr · Alfa sia-r45 · ACT a25f45
Headings should not be empty15axe empty-heading · Alfa sia-r64 · ACT ffd0e9
ARIA commands must have an accessible name9axe aria-command-name · Alfa sia-r12 · ACT 97a4e1
Zooming and scaling must not be disabled1axe meta-viewport · Alfa sia-r47 · ACT b4f0c3
Documents must have <title> element to aid in navigation1axe document-title · Alfa sia-r1 · ACT 2779a5