vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W32

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) 819 2
2.5.5 WCAG 2.5.5 761 1
1.1.1 Non-text Content (images, icons) 740 2
3.1.1 Language of Page 730 2
1.4.6 WCAG 1.4.6 665 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 ~578 finding(s) on 578 page(s).
XPath / selector: html
<html>
 Serious 578 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~652 finding(s) on 652 page(s).
XPath / selector: html
<html>
 Moderate 652 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~168 finding(s) on 168 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="Insérer un courriel" value="Insérer un courriel" onfocus="this.value=''">
 Serious 168 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~176 finding(s) on 176 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--home" style="--mobile-header-offset: 0px;">
 Moderate 176 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~152 finding(s) on 152 page(s).
XPath / selector: <html>
 Moderate 152 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Form elements must have labels · unattributed component
Fix one place, resolve ~161 finding(s) on 161 page(s).
XPath / selector: #searchBox
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
 Critical 161 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 ~161 finding(s) on 161 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
 Moderate 161 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~398 finding(s) on 398 page(s).
XPath / selector: img[height="10"][alt=" "][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="1" height="10" alt=" " border="0">
 Critical 398 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~785 finding(s) on 393 page(s).
XPath / selector: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">
 Critical 393 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Obsolete <big> element (use CSS) · unattributed component
Fix one place, resolve ~65 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)

Bug reports

32 issue type(s) are shown by default out of 77 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 5 critical, 19 serious, 47 moderate, 6 minor. By WCAG category: 33 WCAG 2.0 A, 3 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 15 Best Practice, 19 Undetermined. Ordered by severity, key-page impact, WCAG level, and prevalence. Following accessibility bug-reporting best practices. Download: Markdown · JSON (full archive) · JSON (AI diagnostic) · CSV (all findings) · Priority pages CSV · Priority pages JSON.

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

The 50 highest-priority findings are shown in full; 27 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

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

Findings needing review

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

Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 606/3333 pages · 964 instances Likely template
Bug ID
VS-e9e2abba
Pattern ID
VS-be8d563e
Combined ID
VS-e9e2abba (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
a[name="content_area"] > font[color="red"]
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 606 of 3333 scanned pages (964 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5008a7.htm.
  2. Locate the element: a[name="content_area"] > font[color="red"]
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 606 pages (CSV).

Testing environment

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

Suggested fix

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

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

Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 587/3333 pages · 6937 instances Likely template
Bug ID
VS-04afcea8
Pattern ID
VS-9074b4dd
Combined ID
VS-04afcea8 (pattern VS-9074b4dd) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

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

Description

Images must have alternative text. Detected by axe-core rule image-alt on 587 of 3333 scanned pages (6937 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5008a7.htm.
  2. Locate the element: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
  3. Confirm the axe-core finding for rule image-alt against WCAG 1.1.1 Non-text Content.

Impact

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

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

Affected pages

…and more — all 587 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe html-has-lang WCAG 2.0 A <html> element must have a lang attribute (WCAG 3.1.1) 578/3333 pages · 578 instances Likely template
Bug ID
VS-aa2f5a7e
Pattern ID
VS-c126b6a6
Combined ID
VS-aa2f5a7e (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-W32 (9 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 578 of 3333 scanned pages (578 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5008a7.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 578 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 262/3333 pages · 872 instances Likely template
Bug ID
VS-3358f751
Pattern ID
VS-e9fe47ac
Combined ID
VS-3358f751 (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-W32 (9 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 262 of 3333 scanned pages (872 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2008/oct/07_0163_fr.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 262 pages (CSV).

Testing environment

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

Suggested fix

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

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

Critical axe label WCAG 2.0 A Form elements must have labels (WCAG 4.1.2) 169/3333 pages · 238 instances Likely template
Bug ID
VS-e2f85605
Pattern ID
VS-fafffee0
Combined ID
VS-e2f85605 (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-W32 (9 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 169 of 3333 scanned pages (238 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6145a7.htm?s_cid=mm6145a7_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 169 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe link-in-text-block WCAG 2.0 A Links must be distinguishable without relying on color (WCAG 1.4.1) 49/3333 pages · 64 instances Likely template
Bug ID
VS-e45213b4
Pattern ID
VS-8ade3360
Combined ID
VS-e45213b4 (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-W32 (9 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 49 of 3333 scanned pages (64 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/healthcare-associated-infections/php/prevention-epicenters/washington.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 49 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 33/3333 pages · 40 instances Likely template
Bug ID
VS-d27ced34
Pattern ID
VS-3f76c7ea
Combined ID
VS-d27ced34 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
iframe[width="500"]
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<iframe src="pdfs/handbook/2025MemberHandbook-Reference.pdf" width="500" height="700"></iframe>

Description

Frames must have an accessible name. Detected by axe-core rule frame-title on 33 of 3333 scanned pages (40 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: iframe[width="500"]
  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 33 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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 29/3333 pages · 29 instances Likely template
Bug ID
VS-18aa0860
Pattern ID
VS-a0bdbdf6
Combined ID
VS-18aa0860 (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
.flex-column
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<ul class="nav scrollnav flex-column d-none d-lg-block usa-sidenav">

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 29 of 3333 scanned pages (29 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: .flex-column
  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 29 pages (CSV).

Testing environment

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

Suggested fix

How to fix: Use <ul>/<ol> with only <li> children for lists; don't fake lists with <div>s.

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 23/3333 pages · 43 instances Likely template
Bug ID
VS-c996cedc
Pattern ID
VS-c613c153
Combined ID
VS-c996cedc (pattern VS-c613c153) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.1.1 Keyboard (Level A, WCAG 2.0)
XPath / selector
.table-responsive > div
History
first seen 2026-W24, last seen 2026-W32 (9 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 23 of 3333 scanned pages (43 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tb-surveillance-report-2023/tables/table-8.html.
  2. Locate the element: .table-responsive > div
  3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 10/3333 pages · 23 instances Likely template
Bug ID
VS-67ca8aa7
Pattern ID
VS-4b45acfe
Combined ID
VS-67ca8aa7 (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-W32 (8 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 10 of 3333 scanned pages (23 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5117a1.htm.
  2. Locate the element: blink
  3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 8/3333 pages · 23 instances
Bug ID
VS-debfd809
Pattern ID
VS-58301a87
Combined ID
VS-debfd809 (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-7
History
first seen 2026-W24, last seen 2026-W32 (9 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-7" href="#acc-panel-7" data-toggle="collapse" data-parent="#accordion-7" aria-controls="acc-panel-7" aria-expanded="true"><butt

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 8 of 3333 scanned pages (23 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0292.
  2. Locate the element: #acc-header-7
  3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 7/3333 pages · 13 instances
Bug ID
VS-eba6c4fa
Pattern ID
VS-fab92378
Combined ID
VS-eba6c4fa (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-W32 (8 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 7 of 3333 scanned pages (13 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/tobacco/campaign/tips/quit-smoking/quit-smoking-medications/how-to-use-quit-smoking-medicines/how-to-use-the-nicotine-lozenge.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

Critical axe button-name WCAG 2.0 A Buttons must have discernible text (WCAG 4.1.2) 6/3333 pages · 11 instances
Bug ID
VS-37860278
Pattern ID
VS-e7298c00
Combined ID
VS-37860278 (pattern VS-e7298c00) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#searchBtn
History
first seen 2026-W26, last seen 2026-W32 (6 wk)

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

<button id="searchBtn" type="submit" class="btn btn-primary m-0" onclick="find(previousSibling.value)"><i class="fas fa-search"></i></button>

Description

Buttons must have discernible text. Detected by axe-core rule button-name on 6 of 3333 scanned pages (11 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: #searchBtn
  3. Confirm the axe-core finding for rule button-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 5/3333 pages · 24 instances
Bug ID
VS-c1c9d34e
Pattern ID
VS-6175596b
Combined ID
VS-c1c9d34e (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_1"] > .table.dfe-table.table-no-header > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(3) > .table-col[role="cell"][data-col="2"] > li
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<li>$5.00 per subject flat rate, regardless of number of years searched</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 5 of 3333 scanned pages (24 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/ndi/apply/ndi-payments.html.
  2. Locate the element: div[data-section="cdc_generic_section_1"] > .table.dfe-table.table-no-header > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(3) > .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

Serious axe td-headers-attr WCAG 2.0 A Table cell headers attributes must refer to other <th> elements in the same tabl (WCAG 1.3.1) 5/3333 pages · 6 instances
Bug ID
VS-e7026de4
Pattern ID
VS-07ba3b17
Combined ID
VS-e7026de4 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
table
History
first seen 2026-W25, last seen 2026-W32 (8 wk)

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

<table class="prevaltb" border="1" summary="2018 Adult Prevalence Tables">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 5 of 3333 scanned pages (6 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/acbs/2018/prevalence_tables/table1_LLCP.html.
  2. Locate the element: table
  3. Confirm the axe-core finding for rule td-headers-attr against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 4/3333 pages · 33 instances
Bug ID
VS-c8bcddf6
Pattern ID
VS-5c82bd60
Combined ID
VS-c8bcddf6 (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=":r4:-heading-0"] > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W32 (9 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 4 of 3333 scanned pages (33 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/vaccine-safety-systems/hcp/cisa/index.html.
  2. Locate the element: th[aria-labelledby=":r4:-heading-0"] > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-prohibited-attr WCAG 2.0 A Elements must only use permitted ARIA attributes (WCAG 4.1.2) 3/3333 pages · 17 instances
Bug ID
VS-167fa929
Pattern ID
VS-ebb1c464
Combined ID
VS-167fa929 (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
tr:nth-child(1) > td:nth-child(3) > .fa-check.fa-2x[aria-label="Yes"]
History
first seen 2026-W28, last seen 2026-W32 (5 wk)

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

<i class="fa fa-2x gray-icon fa-check" aria-label="Yes"></i>

Description

Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 3 of 3333 scanned pages (17 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: tr:nth-child(1) > td:nth-child(3) > .fa-check.fa-2x[aria-label="Yes"]
  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

Serious axe document-title WCAG 2.0 A Documents must have <title> element to aid in navigation (WCAG 2.4.2) 2/3333 pages · 2 instances Likely content
Bug ID
VS-802d6b7d
Pattern ID
VS-c80d5faa
Combined ID
VS-802d6b7d (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-W32 (4 wk)

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

<html>

Description

Documents must have <title> element to aid in navigation. Detected by axe-core rule document-title on 2 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5001a1.htm.
  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

Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 1/3333 pages · 2 instances Likely content
Bug ID
VS-b1fc7b4d
Pattern ID
VS-9429bb8d
Combined ID
VS-b1fc7b4d (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-7
History
first seen 2026-W25, last seen 2026-W32 (8 wk)

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

<div class="accordion indicator-plus accordion-white mb3" id="accordion-7" role="tablist">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/stophivtogether/hiv-testing/self-testing.html?s_cid=so_togetherconsumertk0292.
  2. Locate the element: #accordion-7
  3. Confirm the axe-core finding for rule aria-required-children against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 1/3333 pages · 2 instances Likely content
Bug ID
VS-4a4afa66
Pattern ID
VS-dd1c019f
Combined ID
VS-4a4afa66 (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
.aspect-ratio-16-9.image-container > a[lang="__"]
History
first seen 2026-W24, last seen 2026-W32 (5 wk)

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

<a href="/bird-flu/media/pdfs/2024/09/avian-flu-transmission-Mamean.pdf" title="How Infected Backyard Poultry Could Spread Bird Flu to People (Mamean)" lang="__">

Description

lang attribute must have a valid value. Detected by axe-core rule valid-lang on 1 of 3333 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/bird-flu/communication-resources/avian-flu-transmission.html.
  2. Locate the element: .aspect-ratio-16-9.image-container > a[lang="__"]
  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

Serious axe aria-hidden-focus WCAG 2.0 A ARIA hidden element must not be focusable or contain focusable elements (WCAG 4.1.2) 1/3333 pages · 1 instances Likely content
Bug ID
VS-981fc1cb
Pattern ID
VS-45146742
Combined ID
VS-981fc1cb (pattern VS-45146742) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#divIdleTimeout
History
first seen 2026-W29, last seen 2026-W32 (3 wk)

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

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

Description

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

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 3013/3333 pages · 31693 instances Likely template
Bug ID
VS-52a8b8e1
Pattern ID
VS-f18df681
Combined ID
VS-52a8b8e1 (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
img[width="5"]
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

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

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 3013 of 3333 scanned pages (31693 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5008a7.htm.
  2. Locate the element: img[width="5"]
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 3013 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe label-title-only Best Practice Form elements should have a visible label (WCAG criterion undetermined) 168/3333 pages · 168 instances Likely template
Bug ID
VS-3540bfee
Pattern ID
VS-33841929
Combined ID
VS-3540bfee (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-W32 (9 wk)

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

<input class="smallfield" type="text" name="email" size="15" title="Insérer un courriel" value="Insérer un courriel" onfocus="this.value=''">

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 168 of 3333 scanned pages (168 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2008/oct/07_0163_fr.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 168 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe aria-dialog-name Best Practice ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined) 5/3333 pages · 5 instances
Bug ID
VS-479df34d
Pattern ID
VS-fa724f90
Combined ID
VS-479df34d (pattern VS-fa724f90) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#myModal
History
first seen 2026-W29, last seen 2026-W32 (4 wk)

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

<div id="myModal" class="modal fade show" style="padding-right: 17px; display: block;" aria-modal="true" role="dialog">

Description

ARIA dialog and alertdialog nodes should have an accessible name. Detected by axe-core rule aria-dialog-name on 5 of 3333 scanned pages (5 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r113 WCAG 2.2 AA Target size is at least 24×24 CSS pixels or has spacing (Minimum) (WCAG 2.5.8) 291/3333 pages · 3005 instances Likely template
Bug ID
VS-7c5cf13a
Pattern ID
VS-179ad9b3
Combined ID
VS-7c5cf13a (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="#nav-group-0fefb" class="nav-plus nav-expandcollapse" data-toggle="collapse" aria-controls="nav-group-0fefb">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 291 of 3333 scanned pages (3005 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/nchs/products/vsus/vsus_1980_2003.htm.
  2. Locate the element: <a href="#nav-group-0fefb" class="nav-plus nav-expandcollapse" data-toggle="collapse" aria-controls="nav-group-0fefb">
  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 291 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r69 WCAG 2.0 AA Text has sufficient color contrast (Enhanced) (WCAG 1.4.3) 213/3333 pages · 1259 instances Likely template
Bug ID
VS-57bbb11e
Pattern ID
VS-f7e99f4b
Combined ID
VS-57bbb11e (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-W32 (9 wk)

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 213 of 3333 scanned pages (1259 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/comprehensive-cancer-control/success-stories/iowa-hpv-vaccination.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 213 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r2 WCAG 2.0 A Image has accessible name (WCAG 1.1.1) 153/3333 pages · 2050 instances Likely template
Bug ID
VS-af9b0a21
Pattern ID
VS-a24eaa8c
Combined ID
VS-af9b0a21 (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 class="float-start me-3 img-fluid" style="height:3em;" src="images/handbook/cheer-megaphone.svg">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 153 of 3333 scanned pages (2050 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: <img class="float-start me-3 img-fluid" style="height:3em;" src="images/handbook/cheer-megaphone.svg">
  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 153 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r4 WCAG 2.0 A Document has a valid lang attribute (WCAG 3.1.1) 152/3333 pages · 152 instances Likely template
Bug ID
VS-414fa1b3
Pattern ID
VS-7a0e5645
Combined ID
VS-414fa1b3 (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-W32 (9 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 152 of 3333 scanned pages (152 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00000401.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 152 pages (CSV).

Testing environment

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

Suggested fix

How to fix: Add a valid lang attribute to <html>.

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

Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 91/3333 pages · 192 instances Likely template
Bug ID
VS-bc06e673
Pattern ID
VS-f7dba940
Combined ID
VS-bc06e673 (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="/comprehensive-cancer-control/index.html" class="cdc-footer__super-title" aria-label="National Comprehensive Cancer Control Program">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 91 of 3333 scanned pages (192 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/comprehensive-cancer-control/success-stories/iowa-hpv-vaccination.html.
  2. Locate the element: <a href="/comprehensive-cancer-control/index.html" class="cdc-footer__super-title" aria-label="National Comprehensive Cancer Control Program">
  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 91 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 90/3333 pages · 981 instances Likely template
Bug ID
VS-f03ca27c
Pattern ID
VS-d6097011
Combined ID
VS-f03ca27c (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 class="forWide">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 90 of 3333 scanned pages (981 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2013/13_0126_es.htm.
  2. Locate the element: <ul class="forWide">
  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 90 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 75/3333 pages · 172 instances Likely template
Bug ID
VS-711e7848
Pattern ID
VS-28ebd979
Combined ID
VS-711e7848 (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/email.do" onclick="openRequestedPopup(); return false;" class="noLinking">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 75 of 3333 scanned pages (172 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0100.htm.
  2. Locate the element: <a href="http://www.cdc.gov/email.do" onclick="openRequestedPopup(); return false;" class="noLinking">
  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 75 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 48/3333 pages · 48 instances Likely template
Bug ID
VS-5c561f2f
Pattern ID
VS-a48e6078
Combined ID
VS-5c561f2f (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 type="text" class="email" id="Email" name="email">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 48 of 3333 scanned pages (48 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/indss_2007.html.
  2. Locate the element: <input type="text" class="email" id="Email" name="email">
  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 48 pages (CSV).

Testing environment

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

Suggested fix

How to fix: Associate the form field with a label.

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

Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 984/3333 pages · 1422 instances Likely template
Bug ID
VS-b693a04f
Pattern ID
VS-d25f622d
Combined ID
VS-b693a04f (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
.col-md-9 > h3
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<h3><strong>Summary</strong></h3>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 984 of 3333 scanned pages (1422 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/volumes/73/wr/mm7329a2.htm?s_cid=mm7329a2_w.
  2. Locate the element: .col-md-9 > h3
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 984 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 813/3333 pages · 813 instances Likely template
Bug ID
VS-87c5e2da
Pattern ID
VS-d5d82446
Combined ID
VS-87c5e2da (pattern VS-d5d82446) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
html
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<html>

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 813 of 3333 scanned pages (813 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5008a7.htm.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule landmark-one-main.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 813 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 808/3333 pages · 832 instances Likely template
Bug ID
VS-82cbc74f
Pattern ID
VS-8806389c
Combined ID
VS-82cbc74f (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-W32 (9 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 808 of 3333 scanned pages (832 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/rsv/hcp/vaccine-clinical-guidance/adults.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 808 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 761/3333 pages · 23830 instances Likely template
Bug ID
VS-a31a3dee
Pattern ID
VS-cb53cc4d
Combined ID
VS-a31a3dee (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="/pcd/index.htm" class="cdc-logo__title">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 761 of 3333 scanned pages (23830 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  2. Locate the element: <a href="/pcd/index.htm" class="cdc-logo__title">
  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 761 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r66 WCAG 2.x AAA Text has enhanced contrast (WCAG 1.4.6) 665/3333 pages · 20171 instances Likely template
Bug ID
VS-2c134875
Pattern ID
VS-646b1e0b
Combined ID
VS-2c134875 (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: "An official website of the United States government "
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 665 of 3333 scanned pages (20171 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  2. Locate the element: text: "An official website of the United States government "
  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 665 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r57 Undetermined Scrolling content can be accessed by keyboard (WCAG criterion undetermined) 548/3333 pages · 8051 instances Likely template
Bug ID
VS-222c27e7
Pattern ID
VS-c18be945
Combined ID
VS-222c27e7 (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-W32 (9 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 548 of 3333 scanned pages (8051 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  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 548 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 392/3333 pages · 419 instances Likely template
Bug ID
VS-998b62ef
Pattern ID
VS-e05344b9
Combined ID
VS-998b62ef (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-W32 (9 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 392 of 3333 scanned pages (419 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.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 392 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 301/3333 pages · 11133 instances Likely template
Bug ID
VS-fa74a9f8
Pattern ID
VS-fbf54eba
Combined ID
VS-fa74a9f8 (pattern VS-fbf54eba) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p class="smallgrey">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 301 of 3333 scanned pages (11133 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  2. Locate the element: <p class="smallgrey">
  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 301 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r53 Undetermined Headings are structured hierarchically (WCAG criterion undetermined) 269/3333 pages · 382 instances Likely template
Bug ID
VS-1f5d2b2a
Pattern ID
VS-f054f4a4
Combined ID
VS-1f5d2b2a (pattern VS-f054f4a4) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h4>
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 269 of 3333 scanned pages (382 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  2. Locate the element: <h4>
  3. Confirm the Siteimprove Alfa finding for rule sia-r53.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 269 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 240/3333 pages · 117762 instances Likely template
Bug ID
VS-6b8a00a3
Pattern ID
VS-2208081b
Combined ID
VS-6b8a00a3 (pattern VS-2208081b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p class="smallgrey">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 240 of 3333 scanned pages (117762 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2019/18_0288.htm.
  2. Locate the element: <p class="smallgrey">
  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 240 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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 195/3333 pages · 214 instances Likely template
Bug ID
VS-de8ed4da
Pattern ID
VS-4fac2f41
Combined ID
VS-de8ed4da (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-W32 (9 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 195 of 3333 scanned pages (214 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/npn.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 195 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 192/3333 pages · 192 instances Likely template
Bug ID
VS-75ab6287
Pattern ID
VS-3d033717
Combined ID
VS-75ab6287 (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-W32 (9 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 192 of 3333 scanned pages (192 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/00000401.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 192 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 176/3333 pages · 176 instances Likely template
Bug ID
VS-db43a063
Pattern ID
VS-fa44f293
Combined ID
VS-db43a063 (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-W32 (9 wk)

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

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

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 176 of 3333 scanned pages (176 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.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 176 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 113/3333 pages · 14074 instances Likely template
Bug ID
VS-1520e181
Pattern ID
VS-04a9d28c
Combined ID
VS-1520e181 (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-W32 (9 wk)

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

<body bgcolor="#ffffff" leftmargin="0" topmargin="0" marginheight="0" marginwidth="0" background="../../../images/bkgnd.gif" class=" dmat-load-complete">

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

Description

Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 113 of 3333 scanned pages (14074 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2005/nov/05_0064_zht.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 113 pages (CSV).

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 99/3333 pages · 99 instances Likely template
Bug ID
VS-e6c659af
Pattern ID
VS-7118fead
Combined ID
VS-e6c659af (pattern VS-7118fead) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 99 of 3333 scanned pages (99 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html.
  2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
  3. Confirm the Siteimprove Alfa finding for rule sia-r61.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 99 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

Minor axe empty-table-header Best Practice Table header text should not be empty (WCAG criterion undetermined) 72/3333 pages · 312 instances Likely template
Bug ID
VS-65eb9879
Pattern ID
VS-d69fc059
Combined ID
VS-65eb9879 (pattern VS-d69fc059) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
tr > .col-2
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

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

<th class="col-2"></th>

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 72 of 3333 scanned pages (312 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/wtc/handbook.html.
  2. Locate the element: tr > .col-2
  3. Confirm the axe-core finding for rule empty-table-header.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 72 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 67/3333 pages · 551 instances Likely template
Bug ID
VS-d064a622
Pattern ID
VS-91d2294a
Combined ID
VS-d064a622 (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-W32 (9 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>Recommendations and Reports</b></i></font>

Description

Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 67 of 3333 scanned pages (551 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5117a1.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 67 pages (CSV).

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

Moderate alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 60/3333 pages · 120 instances Likely template
Bug ID
VS-9284939b
Pattern ID
VS-2cd767ca
Combined ID
VS-9284939b (pattern VS-2cd767ca) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h3 class="h3">
History
first seen 2026-W24, last seen 2026-W32 (9 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 60 of 3333 scanned pages (120 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2013/13_0126_es.htm.
  2. Locate the element: <h3 class="h3">
  3. Confirm the Siteimprove Alfa finding for rule sia-r78.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 60 pages (CSV).

Testing environment

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

Suggested fix

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r78

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

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

SeverityFindingWCAG categoryPages
Moderate Obsolete <big> element (use CSS) (WCAG criterion undetermined) [big-element] Undetermined 48
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 31
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 26
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 19
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 17
Minor Headings should not be empty (WCAG criterion undetermined) [empty-heading] Best Practice 17
Moderate Table cell has header (WCAG 1.3.1) [sia-r77] WCAG 2.0 A 9
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 9
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 7
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 7
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 6
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 5
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 4
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 4
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 3
Moderate Scrollable element is keyboard accessible (WCAG 1.4.8) [sia-r80] WCAG 2.x AAA 3
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] Undetermined 3
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 3
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 2
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 2
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 1
Moderate aria-hidden element does not contain focusable elements (WCAG 4.1.2) [sia-r17] WCAG 2.0 A 1
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 1
Moderate Keyboard (WCAG 2.1.1) [sia-r84] WCAG 2.0 A 1
Moderate Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 1
Minor Elements marked as presentational should be consistently ignored (WCAG criterion undetermined) [presentation-role-conflict] Best Practice 1
Minor Tables should not have the same summary and caption (WCAG criterion undetermined) [table-duplicate-name] Best Practice 1

Deque axe-core findings

Rule-level axe-core summary (36 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-W32, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 3013 31693 /mmwr/preview/mmwrhtml/mm5008a7.htm
/rsv/hcp/vaccine-clinical-guidance/adults.html
/injury-icrc/php/projects/centers.html		 all 3013 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 984 1422 /mmwr/volumes/73/wr/mm7329a2.htm
/pcd/issues/2019/18_0288.htm
/nchs/products/vsus/vsus_1980_2003.htm		 all 984 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 813 813 /mmwr/preview/mmwrhtml/mm5008a7.htm
/mmwr/preview/mmwrhtml/mm6145a7.htm
/mmwr/preview/mmwrhtml/mm5803a4.htm		 all 813 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 808 832 /rsv/hcp/vaccine-clinical-guidance/adults.html
/injury-icrc/php/projects/centers.html
/acip/evidence-to-recommendations/covid-19-novavax-etr.html		 all 808 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 606 964 /mmwr/preview/mmwrhtml/mm5008a7.htm
/mmwr/preview/mmwrhtml/mm6145a7.htm
/mmwr/preview/mmwrhtml/mm5803a4.htm		 all 606 pages (CSV)
Images must have alternative text [image-alt] critical 587 6937 /mmwr/preview/mmwrhtml/mm5008a7.htm
/mmwr/preview/mmwrhtml/mm5803a4.htm
/pcd/issues/2008/oct/07_0163_fr.htm		 all 587 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 578 578 /mmwr/preview/mmwrhtml/mm5008a7.htm
/mmwr/preview/mmwrhtml/mm5803a4.htm
/pcd/issues/2008/oct/07_0163_fr.htm		 all 578 pages (CSV)
Links must have discernible text [link-name] serious 262 872 /pcd/issues/2008/oct/07_0163_fr.htm
/pcd/issues/2005/nov/05_0064_zht.htm
/niosh-rtecs/WJ882F48.html		 all 262 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 195 214 /wtc/npn.html
/niosh/docs/mining/works/coversheet1250.html
/spanish/niosh/docs/wp-solutions/2013-103_sp		 all 195 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 176 176 /coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html
/hiv/partners/index.html
/ncbddd/spanish/actearly/concerned.html		 all 176 pages (CSV)
Form elements must have labels [label] critical 169 238 /mmwr/preview/mmwrhtml/mm6145a7.htm
/mmwr/preview/mmwrhtml/mm6338a4.htm
/mmwr/indss_2007.html		 all 169 pages (CSV)
Form elements should have a visible label [label-title-only] serious 168 168 /pcd/issues/2008/oct/07_0163_fr.htm
/pcd/issues/2005/nov/05_0064_zht.htm
/pcd/issues/2005/nov/05_0081.htm		 all 168 pages (CSV)
Table header text should not be empty [empty-table-header] minor 72 312 /wtc/handbook.html
/pcd/issues/2005/nov/05_0081.htm
/fluview/surveillance/2025-week-30.html		 all 72 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 49 64 /healthcare-associated-infections/php/prevention-epicenters/washington.html
/nhsn/dialysis/enroll.html
/act-early/milestones/3-years.html		 all 49 pages (CSV)
Frames must have an accessible name [frame-title] serious 33 40 /wtc/handbook.html
/stophivtogether/hiv-testing/self-testing.html
/antimicrobial-resistance/prevention/animals.html		 all 33 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 31 31 /pcd/issues/2013/13_0126_es.htm
/pcd/issues/2013/12_0149_es.htm
/niosh/docs/2005-131		 all 31 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 29 29 /wtc/handbook.html
/mmwr/preview/mmwrhtml/00046725.htm
/mmwr/preview/mmwrhtml/00016138.htm		 all 29 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 23 43 /tb-surveillance-report-2023/tables/table-8.html
/fluview/surveillance/2024-week-47.html
/fluview/surveillance/2025-week-15.html		 all 23 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 19 261 /acip/evidence-to-recommendations/covid-19-novavax-etr.html
/fluview/surveillance/2025-week-30.html
/pcd/issues/2017/16_0480.htm		 all 19 pages (CSV)
Headings should not be empty [empty-heading] minor 17 17 /mmwr/preview/mmwrhtml/mm5513a6.htm
/nchs/nsfg/key_statistics/m.htm
/mmwr/preview/mmwrhtml/mm5544a1.htm		 all 17 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 10 23 /mmwr/preview/mmwrhtml/rr5117a1.htm
/mmwr/preview/mmwrhtml/ss5001a1.htm
/mmwr/preview/mmwrhtml/00001674.htm		 all 10 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 8 23 /stophivtogether/hiv-testing/self-testing.html
/tobacco/campaign/tips/diseases/periodontal-gum-disease.html
/tobacco/campaign/tips/spanish/enfermedades/tabaquismo-vision.html		 all 8 pages (CSV)
Select element must have an accessible name [select-name] critical 7 13 /tobacco/campaign/tips/quit-smoking/quit-smoking-medications/how-to-use-quit-smoking-medicines/how-to-use-the-nicotine-lozenge.html
/nchs/products/databriefs.htm
/tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/que-medicamento-es-adecuado-para-usted/index.html		 all 7 pages (CSV)
Buttons must have discernible text [button-name] critical 6 11 /wtc/handbook.html
/hiv/testing/index.html
/hiv/prevention/prep.html		 all 6 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 5 24 /nchs/ndi/apply/ndi-payments.html
/hivnexus/hcp/pep/index.html
/mmwr/preview/mmwrhtml/rr5019a1.htm		 all 5 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 5 6 /brfss/acbs/2018/prevalence_tables/table1_LLCP.html
/vaccines/imz-schedules/child-easyread-es.html
/acip/grade/HPV-adults.html		 all 5 pages (CSV)
ARIA dialog and alertdialog nodes should have an accessible name [aria-dialog-name] serious 5 5 /wtc/npn.html
/wtc/handbook.html
/fluview/surveillance/index.html		 all 5 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 4 33 /vaccine-safety-systems/hcp/cisa/index.html
/united-states-cancer-statistics/publications/breast-cancer-stat-bite.html
/hepatitis/php/npr-2025/hep-b-reduce-infections-pwid.html		 all 4 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 4 16 /nhsn/training/roadmap/index.html
/injury/wisqars/animated-leading-causes.html
/ardi		 all 4 pages (CSV)
Elements must only use permitted ARIA attributes [aria-prohibited-attr] serious 3 17 /wtc/handbook.html
/stophivtogether/hiv-testing/self-testing.html
/HIVTreatment		 all 3 pages (CSV)
Documents must have <title> element to aid in navigation [document-title] serious 2 2 /mmwr/preview/mmwrhtml/ss5001a1.htm
/es/disasters/extremeheat/heattips.html		 all 2 pages (CSV)
Elements marked as presentational should be consistently ignored [presentation-role-conflict] minor 1 3 /nchs/nvss/vsrr/provisional-tables.htm all 1 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 1 2 /stophivtogether/hiv-testing/self-testing.html all 1 pages (CSV)
lang attribute must have a valid value [valid-lang] serious 1 2 /bird-flu/communication-resources/avian-flu-transmission.html all 1 pages (CSV)
Tables should not have the same summary and caption [table-duplicate-name] minor 1 1 /hearing-loss-children/guidance-manual/chapter-1.html all 1 pages (CSV)
ARIA hidden element must not be focusable or contain focusable elements [aria-hidden-focus] serious 1 1 /ardi all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (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-W32, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 761 23830 /pcd/issues/2019/18_0288.htm
/nchs/products/vsus/vsus_1980_2003.htm
/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html		 all 761 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 665 20171 /pcd/issues/2019/18_0288.htm
/nchs/products/vsus/vsus_1980_2003.htm
/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html		 all 665 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 548 8051 /pcd/issues/2019/18_0288.htm
/nchs/products/vsus/vsus_1980_2003.htm
/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html		 all 548 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 392 419 /coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html
/comprehensive-cancer-control/success-stories/iowa-hpv-vaccination.html
/pcd/issues/2013/13_0126_es.htm		 all 392 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 301 11133 /pcd/issues/2019/18_0288.htm
/pcd/issues/2013/13_0126_es.htm
/pcd/issues/2020/19_0296a.htm		 all 301 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 291 3005 /nchs/products/vsus/vsus_1980_2003.htm
/nchs/fastats/suicide.htm
/nchs/nsfg/nsfg_2002_questionnaires.htm		 all 291 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 269 382 /pcd/issues/2019/18_0288.htm
/nchs/products/vsus/vsus_1980_2003.htm
/nchs/fastats/suicide.htm		 all 269 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 240 117762 /pcd/issues/2019/18_0288.htm
/pcd/issues/2013/13_0126_es.htm
/pcd/issues/2020/19_0296a.htm		 all 240 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 213 1259 /comprehensive-cancer-control/success-stories/iowa-hpv-vaccination.html
/wtc/handbook.html
/niosh/manufacturing/hazardous-energy-control/resource-guide.html		 all 213 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 192 192 /mmwr/preview/mmwrhtml/00000401.htm
/mmwr/preview/mmwrhtml/00015136.htm
/pcd/issues/2010/mar/09_0035_es.htm		 all 192 pages (CSV)
Image has accessible name [sia-r2] n/a 153 2050 /wtc/handbook.html
/mmwr/preview/mmwrhtml/00000401.htm
/mmwr/preview/mmwrhtml/00015136.htm		 all 153 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 152 152 /mmwr/preview/mmwrhtml/00000401.htm
/mmwr/preview/mmwrhtml/00015136.htm
/pcd/issues/2010/mar/09_0035_es.htm		 all 152 pages (CSV)
Form field label is visible [sia-r61] n/a 99 99 /coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/overview.html
/pcd/issues/2013/13_0126_es.htm
/wtc/handbook.html		 all 99 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 91 192 /comprehensive-cancer-control/success-stories/iowa-hpv-vaccination.html
/act-early/resources/milestone-checklists.html
/uterine-cancer/es/stories/index.html		 all 91 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 90 981 /pcd/issues/2013/13_0126_es.htm
/mmwr/indss_2007.html
/niosh/manufacturing/hazardous-energy-control/resource-guide.html		 all 90 pages (CSV)
Link has accessible name [sia-r11] n/a 75 172 /pcd/issues/2012/11_0100.htm
/pcd/issues/2010/mar/09_0035_es.htm
/pcd/issues/2008/apr/07_0203.htm		 all 75 pages (CSV)
Table header has scope [sia-r78] n/a 60 120 /pcd/issues/2013/13_0126_es.htm
/pcd/issues/2012/11_0100.htm
/pcd/issues/2013/12_0132.htm		 all 60 pages (CSV)
Form field has accessible name [sia-r8] n/a 48 48 /mmwr/indss_2007.html
/mmwr/preview/mmwrhtml/mm6128a8.htm
/mmwr/preview/mmwrhtml/mm6345a3.htm		 all 48 pages (CSV)
Input purpose can be determined [sia-r60] n/a 17 17 /pcd/issues/2013/13_0126_es.htm
/mmwr/indss_2007.html
/pcd/issues/2012/11_0100.htm		 all 17 pages (CSV)
Table cell has header [sia-r77] n/a 9 9422 /nchs/nsfg/key_statistics/m.htm
/fluview/surveillance/2024-week-47.html
/pcd/issues/2004/jan/03_0015.htm		 all 9 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 9 18 /powassan/data-maps/historic-data.html
/hiv-data/nhss/national-hiv-prevention-and-care-objectives-2026.html
/ticks/after-a-tick-bite/index.html		 all 9 pages (CSV)
Button has accessible name [sia-r12] n/a 7 25 /wtc/handbook.html
/stophivtogether/hiv-testing/self-testing.html
/nchs/nvss/facility-worksheets-guide/06.htm		 all 7 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 7 19 /mmwr/preview/mmwrhtml/00048395.htm
/mmwr/preview/mmwrhtml/00049726.htm
/mmwr/preview/mmwrhtml/00055745.htm		 all 7 pages (CSV)
Element has required owned roles [sia-r64] n/a 6 6 /nchs/nsfg/key_statistics/m.htm
/mmwr/preview/mmwrhtml/mm5408a3.htm
/mmwr/preview/mmwrhtml/mm5342a3.htm		 all 6 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 5 5 /wtc/handbook.html
/pcd/issues/2008/apr/07_0249a.htm
/wtc/stac.html		 all 5 pages (CSV)
Element has required aria-owns [sia-r46] n/a 4 39 /asthma/nhis/2014/table1-1.htm
/niosh/fishing/data-research/regional-summaries/east-coast.html
/brfss/acbs/2018/prevalence_tables/table13_LLCP.html		 all 4 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 3 16 /stophivtogether/hiv-testing/self-testing.html
/tobacco/campaign/tips/groups/hispanic-latino.html
/HIVTreatment		 all 3 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 3 5 /pcd/issues/2009/apr/toc.htm
/ardi
/pcd/issues/2008/apr/toc.htm		 all 3 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 3 3 /pcd/issues/2008/apr/07_0249a.htm
/flu/weekly/weeklyarchives2024-2025/data/senAllregt44.html
/flu/weekly/weeklyarchives2023-2024/WhoPHL27.html		 all 3 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 2 138 /niosh/fishing/data-research/regional-summaries/east-coast.html
/brfss/acbs/2018/prevalence_tables/table13_LLCP.html		 all 2 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 2 4 /united-states-cancer-statistics/publications/breast-cancer-stat-bite.html
/hepatitis/php/npr-2023/hep-c-reduce-infections-pwid.html		 all 2 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 1 8 /mmwr/preview/mmwrhtml/rr5908a1.htm all 1 pages (CSV)
aria-hidden element does not contain focusable elements [sia-r17] n/a 1 2 /ardi all 1 pages (CSV)
Form field error is identified and described [sia-r75] n/a 1 2 /mmwr/preview/mmwrhtml/mm6132a4.htm all 1 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 1 1 /pcd/issues/2009/apr/08_0236.htm all 1 pages (CSV)
sia-r84 n/a 1 1 /niosh/fishing/data-research/regional-summaries/east-coast.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 (13418 raw engine findings → 12975 unique).

Unique issues (rule × page)
12975
Caught by both engines
443 highest confidence
axe only
8253
Alfa only
4279
9 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-W32, by pages affected.
IssuePagesRule references
Images must have alternative text587axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute578axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Elements must only use permitted ARIA attributes392axe aria-prohibited-attr · Alfa sia-r18 · ACT 5c01ea
Links must have discernible text262axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels176axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty17axe empty-heading · Alfa sia-r64 · ACT ffd0e9
Buttons must have discernible text14axe button-name · Alfa sia-r12 · ACT 97a4e1
Table cell headers attributes must refer to other <th> elements in the same table5axe td-headers-attr · Alfa sia-r45 · ACT a25f45
ARIA hidden element must not be focusable or contain focusable elements1axe aria-hidden-focus · Alfa sia-r17 · ACT 6cfa84