vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W27

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

Training priorities

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

SCCriterionPagesRulesNotes
2.5.5 WCAG 2.5.5 781 1
1.4.6 WCAG 1.4.6 634 1
1.4.3 Contrast (Minimum) 620 2
1.4.8 WCAG 1.4.8 591 3
1.1.1 Non-text Content (images, icons) 542 2

Next 10 actions

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

Top 10 clustered component fixes for this week.
ClusterSeverityPagesWho it affectsHow to fixEvidenceDecision
<html> element must have a lang attribute · unattributed component
Fix one place, resolve ~333 finding(s) on 333 page(s).
XPath / selector: html
<html>
 Serious 333 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~177 finding(s) on 177 page(s).
XPath / selector: <html>
 Moderate 177 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~365 finding(s) on 365 page(s).
XPath / selector: html
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 Moderate 365 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 ~67 finding(s) on 67 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 67 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 ~94 finding(s) on 94 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-2022 theme-blue cdc-page-type-splash cdc-tp5 cdc-2020 mobile-nav">
 Moderate 94 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) c · unattributed component
Fix one place, resolve ~472 finding(s) on 472 page(s).
XPath / selector: .page-right-rail__static
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
 Moderate 472 Requires manual testing. When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. "Primary" and "Footer" navigation) so screen-reader users can tell them apart. pages (CSV)
No obsolete or deprecated elements are used · unattributed component
Fix one place, resolve ~141 finding(s) on 141 page(s).
XPath / selector: {"type":"document","children":[{"type":"element","children":[{"type":"element","
 Moderate 141 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)
Form elements must have labels · unattributed component
Fix one place, resolve ~60 finding(s) on 60 page(s).
XPath / selector: #searchBox
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
 Critical 60 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)
aria attribute is permitted for element role · unattributed component
Fix one place, resolve ~350 finding(s) on 350 page(s).
XPath / selector: @aria-label="Official website of the United States government"
 Moderate 350 Requires manual testing. Only use ARIA states/properties that are allowed on this element/role. pages (CSV)
Scrolling content can be accessed by keyboard · unattributed component
Fix one place, resolve ~460 finding(s) on 460 page(s).
XPath / selector: text: "Skip directly to search"
 Moderate 460 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r57 pages (CSV)

Bug reports

27 issue type(s) are shown by default out of 73 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 4 critical, 15 serious, 50 moderate, 4 minor. By WCAG category: 30 WCAG 2.0 A, 2 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 14 Best Practice, 20 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; 23 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

11 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) 372/1667 pages · 545 instances Likely template
Bug ID
VS-8d4eb089
Pattern ID
VS-be8d563e
Combined ID
VS-8d4eb089 (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
.wm-label
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 372 of 1667 scanned pages (545 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm.
  2. Locate the element: .wm-label
  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 372 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) 352/1667 pages · 3273 instances Likely template
Bug ID
VS-7d831a0d
Pattern ID
VS-9074b4dd
Combined ID
VS-7d831a0d (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-W27 (4 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 352 of 1667 scanned pages (3273 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.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 352 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) 333/1667 pages · 333 instances Likely template
Bug ID
VS-d9a6ade2
Pattern ID
VS-c126b6a6
Combined ID
VS-d9a6ade2 (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-W27 (4 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 333 of 1667 scanned pages (333 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.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 333 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) 120/1667 pages · 235 instances Likely template
Bug ID
VS-ffd48287
Pattern ID
VS-e9fe47ac
Combined ID
VS-ffd48287 (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
a[href$="email.do"]
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<a href="http://www.cdc.gov/email.do" onclick="openRequestedPopup(); return false;" class="noLinking">&nbsp;</a>

Description

Links must have discernible text. Detected by axe-core rule link-name on 120 of 1667 scanned pages (235 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm.
  2. Locate the element: a[href$="email.do"]
  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 120 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) 65/1667 pages · 65 instances Likely template
Bug ID
VS-86bf9ae8
Pattern ID
VS-fafffee0
Combined ID
VS-86bf9ae8 (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-W27 (4 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 65 of 1667 scanned pages (65 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a2.htm?s_cid=mm6019a2_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 65 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) 25/1667 pages · 39 instances Likely template
Bug ID
VS-f375ec42
Pattern ID
VS-8ade3360
Combined ID
VS-f375ec42 (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-W27 (4 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 25 of 1667 scanned pages (39 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/infection-control/hcp/healthcare-personnel-epidemiology-control/measles.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

Testing environment

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

Suggested fix

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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 25/1667 pages · 31 instances Likely template
Bug ID
VS-4c0a58b3
Pattern ID
VS-a0bdbdf6
Combined ID
VS-4c0a58b3 (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
li:nth-child(3) > ul
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<ul>

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 25 of 1667 scanned pages (31 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html.
  2. Locate the element: li:nth-child(3) > ul
  3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 13/1667 pages · 42 instances Likely template
Bug ID
VS-04e64b75
Pattern ID
VS-3f76c7ea
Combined ID
VS-04e64b75 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
div[data-yt-id="UZSu5BeVWNQ"] > iframe
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/UZSu5BeVWNQ?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.

Description

Frames must have an accessible name. Detected by axe-core rule frame-title on 13 of 1667 scanned pages (42 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/global-hiv-tb/php/resources/video.html.
  2. Locate the element: div[data-yt-id="UZSu5BeVWNQ"] > iframe
  3. Confirm the axe-core finding for rule frame-title against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 9/1667 pages · 12 instances
Bug ID
VS-5fe72544
Pattern ID
VS-4b45acfe
Combined ID
VS-5fe72544 (pattern VS-4b45acfe) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.2.2 Pause, Stop, Hide (Level A, WCAG 2.0)
XPath / selector
i > font[color="#FF0000"] > blink
History
first seen 2026-W25, last seen 2026-W27 (3 wk)

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

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

Description

<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 9 of 1667 scanned pages (12 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5407a1.htm.
  2. Locate the element: i > font[color="#FF0000"] > blink
  3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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) 6/1667 pages · 8 instances
Bug ID
VS-a75b07d4
Pattern ID
VS-07ba3b17
Combined ID
VS-a75b07d4 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
div[data-section="cdc_generic_section_6"] > .dfe-block.dfe-block--cdcmodule.cdc_raw_html > .dfe-block.dfe-block--cdcmodule.cdc_raw_html > table
History
first seen 2026-W25, last seen 2026-W27 (3 wk)

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

<table class="table table-sm table-bordered nein-scroll fs08">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 6 of 1667 scanned pages (8 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/ncird/surveillance/respiratory-illnesses/index.html.
  2. Locate the element: div[data-section="cdc_generic_section_6"] > .dfe-block.dfe-block--cdcmodule.cdc_raw_html > .dfe-block.dfe-block--cdcmodule.cdc_raw_html > 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 scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 5/1667 pages · 14 instances
Bug ID
VS-3db815ca
Pattern ID
VS-c613c153
Combined ID
VS-3db815ca (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-W27 (4 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 5 of 1667 scanned pages (14 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tb/hcp/treatment/tuberculosis-disease.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 aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 4/1667 pages · 48 instances
Bug ID
VS-3f9462e4
Pattern ID
VS-5c82bd60
Combined ID
VS-3f9462e4 (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:nth-child(1) > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W27 (4 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 1667 scanned pages (48 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hepatitis/php/npr-2025/hep-b-reduce-deaths-api.html.
  2. Locate the element: th:nth-child(1) > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 3/1667 pages · 10 instances
Bug ID
VS-7e33e31b
Pattern ID
VS-58301a87
Combined ID
VS-7e33e31b (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-8
History
first seen 2026-W24, last seen 2026-W27 (4 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-8" href="#acc-panel-8" data-toggle="collapse" data-parent="#accordion-8" aria-controls="acc-panel-8" aria-expanded="true"><butt

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 3 of 1667 scanned pages (10 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html.
  2. Locate the element: #acc-header-8
  3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 2/1667 pages · 18 instances Likely content
Bug ID
VS-fbe283ae
Pattern ID
VS-6175596b
Combined ID
VS-fbe283ae (pattern VS-6175596b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table.dfe-table.table-no-header:nth-child(7) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(1) > .table-col[data-col="2"][role="cell"] > li
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<li>People who are 6 years or older</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 2 of 1667 scanned pages (18 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/typhoid-fever/prevention/index.html.
  2. Locate the element: .table.dfe-table.table-no-header:nth-child(7) > .table-body[role="rowgroup"] > .table-row.row[role="row"]:nth-child(1) > .table-col[data-col="2"][role="cell"] > 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

Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 1/1667 pages · 14 instances Likely content
Bug ID
VS-5f94de7c
Pattern ID
VS-9429bb8d
Combined ID
VS-5f94de7c (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-8
History
first seen 2026-W25, last seen 2026-W27 (3 wk)

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

<div class="accordion indicator-plus accordion-white mb3" id="accordion-8" role="tablist">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 1667 scanned pages (14 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html.
  2. Locate the element: #accordion-8
  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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 1/1667 pages · 3 instances Likely content
Bug ID
VS-f41d73c7
Pattern ID
VS-fab92378
Combined ID
VS-f41d73c7 (pattern VS-fab92378) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#year_group
History
first seen 2026-W25, last seen 2026-W27 (3 wk)

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

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

Description

Select element must have an accessible name. Detected by axe-core rule select-name on 1 of 1667 scanned pages (3 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/hus/data-finder.htm?subject=Health+insurance.
  2. Locate the element: #year_group
  3. Confirm the axe-core finding for rule select-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe document-title WCAG 2.0 A Documents must have <title> element to aid in navigation (WCAG 2.4.2) 1/1667 pages · 1 instances Likely content
Bug ID
VS-1cda8beb
Pattern ID
VS-c80d5faa
Combined ID
VS-1cda8beb (pattern VS-c80d5faa) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.2 Page Titled (Level A, WCAG 2.0)
XPath / selector
#js
History
first seen 2026-W25, last seen 2026-W27 (2 wk)

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

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

Description

Documents must have <title> element to aid in navigation. Detected by axe-core rule document-title on 1 of 1667 scanned pages (1 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5906a6.htm.
  2. Locate the element: #js
  3. Confirm the axe-core finding for rule document-title against WCAG 2.4.2 Page Titled.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 1580/1667 pages · 12091 instances Likely template
Bug ID
VS-3191fb6d
Pattern ID
VS-f18df681
Combined ID
VS-3191fb6d (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
.cdc-site-gov-notice
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

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

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 1580 of 1667 scanned pages (12091 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/lab-training.
  2. Locate the element: .cdc-site-gov-notice
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1580 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) 67/1667 pages · 67 instances Likely template
Bug ID
VS-5500bdec
Pattern ID
VS-33841929
Combined ID
VS-5500bdec (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-W27 (4 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 67 of 1667 scanned pages (67 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2008/oct/07_0169_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 67 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

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) 285/1667 pages · 2638 instances Likely template
Bug ID
VS-5ff32d9b
Pattern ID
VS-179ad9b3
Combined ID
VS-5ff32d9b (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-b7162" class="nav-plus nav-expandcollapse" data-toggle="collapse" aria-controls="nav-group-b7162">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 285 of 1667 scanned pages (2638 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm.
  2. Locate the element: <a href="#nav-group-b7162" class="nav-plus nav-expandcollapse" data-toggle="collapse" aria-controls="nav-group-b7162">
  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 285 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) 248/1667 pages · 1395 instances · possible duplicate Likely template
Bug ID
VS-bd6b03e5
Pattern ID
VS-f7e99f4b
Combined ID
VS-bd6b03e5 (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-W27 (4 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-8d4eb089 (pattern VS-be8d563e). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 248 of 1667 scanned pages (1395 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

…and more — all 248 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) 190/1667 pages · 1664 instances · possible duplicate Likely template
Bug ID
VS-079d1d57
Pattern ID
VS-a24eaa8c
Combined ID
VS-079d1d57 (pattern VS-a24eaa8c) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
<img src="../../images/spacer.gif" width="10" height="1" alt=" ">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-7d831a0d (pattern VS-9074b4dd). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 190 of 1667 scanned pages (1664 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm.
  2. Locate the element: <img src="../../images/spacer.gif" width="10" height="1" alt=" ">
  3. Confirm the Siteimprove Alfa finding for rule sia-r2 against WCAG 1.1.1 Non-text Content.

Impact

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

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

Affected pages

…and more — all 190 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) 177/1667 pages · 177 instances · possible duplicate Likely template
Bug ID
VS-06d1dd0f
Pattern ID
VS-7a0e5645
Combined ID
VS-06d1dd0f (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-W27 (4 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-d9a6ade2 (pattern VS-c126b6a6). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 177 of 1667 scanned pages (177 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.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 177 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-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 80/1667 pages · 1062 instances Likely template
Bug ID
VS-4cf7e767
Pattern ID
VS-d6097011
Combined ID
VS-4cf7e767 (pattern VS-d6097011) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
<ul>
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 80 of 1667 scanned pages (1062 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html.
  2. Locate the element: <ul>
  3. Confirm the Siteimprove Alfa finding for rule sia-r68 against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 80 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-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 78/1667 pages · 132 instances Likely template
Bug ID
VS-9722a47b
Pattern ID
VS-f7dba940
Combined ID
VS-9722a47b (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="/ecoli/about/index.html" class="cdc-footer__super-title" aria-label="<em>E. coli</em> Infection (<em>Escherichia coli</em>)">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 78 of 1667 scanned pages (132 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html.
  2. Locate the element: <a href="/ecoli/about/index.html" class="cdc-footer__super-title" aria-label="<em>E. coli</em> Infection (<em>Escherichia coli</em>)">
  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 78 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-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 64/1667 pages · 127 instances · possible duplicate Likely template
Bug ID
VS-e5e79a3b
Pattern ID
VS-28ebd979
Combined ID
VS-e5e79a3b (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-W27 (4 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-ffd48287 (pattern VS-e9fe47ac). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 64 of 1667 scanned pages (127 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.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 64 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) 31/1667 pages · 33 instances Likely template
Bug ID
VS-82f7d8b3
Pattern ID
VS-a48e6078
Combined ID
VS-82f7d8b3 (pattern VS-a48e6078) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
<input id="searchBox" class="searchBox" name="query" maxlength="256">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 31 of 1667 scanned pages (33 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5907a5.htm.
  2. Locate the element: <input id="searchBox" class="searchBox" name="query" maxlength="256">
  3. Confirm the Siteimprove Alfa finding for rule sia-r8 against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

…and more — all 31 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 781/1667 pages · 23048 instances Likely template
Bug ID
VS-3af4b270
Pattern ID
VS-cb53cc4d
Combined ID
VS-3af4b270 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 781 of 1667 scanned pages (23048 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 781 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) 634/1667 pages · 20477 instances Likely template
Bug ID
VS-dedce6cd
Pattern ID
VS-646b1e0b
Combined ID
VS-dedce6cd (pattern VS-646b1e0b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.6 Contrast (Enhanced) (Level AAA, WCAG 2.0)
XPath / selector
text: " Here's how you know "
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 634 of 1667 scanned pages (20477 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/restaurant-food-safety/php/practices/index.html.
  2. Locate the element: text: " Here's how you know "
  3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 634 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) 556/1667 pages · 8111 instances Likely template
Bug ID
VS-85611adf
Pattern ID
VS-c18be945
Combined ID
VS-85611adf (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-W27 (4 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 556 of 1667 scanned pages (8111 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 556 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate axe heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 536/1667 pages · 760 instances Likely template
Bug ID
VS-3b82e9cf
Pattern ID
VS-d25f622d
Combined ID
VS-3b82e9cf (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
.float-right
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<h6 class="float-right">August 2013</h6>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 536 of 1667 scanned pages (760 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/niosh/docket/archive/docket229A.html.
  2. Locate the element: .float-right
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 536 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 475/1667 pages · 478 instances Likely template
Bug ID
VS-51da8d15
Pattern ID
VS-8806389c
Combined ID
VS-51da8d15 (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-W27 (4 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 475 of 1667 scanned pages (478 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/lab-training.
  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 475 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 426/1667 pages · 426 instances Likely template
Bug ID
VS-0d607102
Pattern ID
VS-d5d82446
Combined ID
VS-0d607102 (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-W27 (4 wk)

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

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

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 426 of 1667 scanned pages (426 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.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 426 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 391/1667 pages · 404 instances Likely template
Bug ID
VS-d8a874ec
Pattern ID
VS-e05344b9
Combined ID
VS-d8a874ec (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-W27 (4 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 391 of 1667 scanned pages (404 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 391 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-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 297/1667 pages · 37668 instances Likely template
Bug ID
VS-32c51bac
Pattern ID
VS-2208081b
Combined ID
VS-32c51bac (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-W27 (4 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 297 of 1667 scanned pages (37668 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.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 297 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 292/1667 pages · 19489 instances Likely template
Bug ID
VS-db407995
Pattern ID
VS-fbf54eba
Combined ID
VS-db407995 (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="dfe-curated-link__title">
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 292 of 1667 scanned pages (19489 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/restaurant-food-safety/php/practices/index.html.
  2. Locate the element: <p class="dfe-curated-link__title">
  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 292 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) 273/1667 pages · 370 instances Likely template
Bug ID
VS-15f214fe
Pattern ID
VS-f054f4a4
Combined ID
VS-15f214fe (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-W27 (4 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 273 of 1667 scanned pages (370 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.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 273 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-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 215/1667 pages · 215 instances Likely template
Bug ID
VS-d276e9a2
Pattern ID
VS-3d033717
Combined ID
VS-d276e9a2 (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-W27 (4 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 215 of 1667 scanned pages (215 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.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 215 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) 94/1667 pages · 94 instances Likely template
Bug ID
VS-1a516eec
Pattern ID
VS-fa44f293
Combined ID
VS-1a516eec (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-W27 (4 wk)

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

<html lang="en-us" class="cdc-2022 theme-blue cdc-page-type-splash cdc-tp5 cdc-2020 mobile-nav">

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 94 of 1667 scanned pages (94 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vitalsigns/hepc-treatment/index.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 94 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 alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 90/1667 pages · 90 instances Likely template
Bug ID
VS-0cbcfdd9
Pattern ID
VS-7118fead
Combined ID
VS-0cbcfdd9 (pattern VS-7118fead) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 90 of 1667 scanned pages (90 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm.
  2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":"-//W3C//
  3. Confirm the Siteimprove Alfa finding for rule sia-r61.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 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-r61

Moderate alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 68/1667 pages · 84 instances Likely template
Bug ID
VS-6dc249e2
Pattern ID
VS-2cd767ca
Combined ID
VS-6dc249e2 (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-W27 (4 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 68 of 1667 scanned pages (84 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_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 68 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

Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 54/1667 pages · 4365 instances Likely template
Bug ID
VS-4f8edd58
Pattern ID
VS-04a9d28c
Combined ID
VS-4f8edd58 (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-W27 (4 wk)

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

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

Description

Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 54 of 1667 scanned pages (4365 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5715a5.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 54 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 deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 36/1667 pages · 254 instances Likely template
Bug ID
VS-e7f1578f
Pattern ID
VS-91d2294a
Combined ID
VS-e7f1578f (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-W27 (4 wk)

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

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

Description

Obsolete <font> element (use CSS). Detected by deprecated-html rule font-element on 36 of 1667 scanned pages (254 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5715a5.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 36 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.

Minor axe empty-table-header Best Practice Table header text should not be empty (WCAG criterion undetermined) 29/1667 pages · 396 instances Likely template
Bug ID
VS-2a9417e9
Pattern ID
VS-d69fc059
Combined ID
VS-2a9417e9 (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
.table-responsive:nth-child(5) > table > thead > .valign-middle:nth-child(1) > th[scope="col"]:nth-child(1)
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

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

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 29 of 1667 scanned pages (396 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm.
  2. Locate the element: .table-responsive:nth-child(5) > table > thead > .valign-middle:nth-child(1) > th[scope="col"]:nth-child(1)
  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 29 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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 29/1667 pages · 38 instances Likely template
Bug ID
VS-81366ac7
Pattern ID
VS-4fac2f41
Combined ID
VS-81366ac7 (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
.d-xxl-none.d-xl-block.cdc-viewports:nth-child(4) > .ds-8.card-btn[href$="#challenge"] > .card-p-right.bg-white.card-body > .align-items-center.row > .card-body-left.col > .vs-resize > img[alt="shield icon"][role="presentation"][decoding="async"]
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<img decoding="async" class="img-fluid" alt="shield icon" role="presentation" src="/vitalsigns/template-options/images/shield-icon.png?_=40314">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 29 of 1667 scanned pages (38 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/vitalsigns/hepc-treatment/index.html.
  2. Locate the element: .d-xxl-none.d-xl-block.cdc-viewports:nth-child(4) > .ds-8.card-btn[href$="#challenge"] > .card-p-right.bg-white.card-body > .align-items-center.row > .card-body-left.col > .vs-resize > img[alt="shield icon"][role="presentation"][decoding="async"]
  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 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: 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 deprecated-html big-element Undetermined Obsolete <big> element (use CSS) (WCAG criterion undetermined) 25/1667 pages · 28 instances Likely template
Bug ID
VS-007ff15b
Pattern ID
VS-7845739d
Combined ID
VS-007ff15b (pattern VS-7845739d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
Rule
deprecated-html — Obsolete <big> element (use CSS) [big-element]
XPath / selector
big
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

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

Description

Obsolete <big> element (use CSS). Detected by deprecated-html rule big-element on 25 of 1667 scanned pages (28 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5715a5.htm.
  2. Locate the element: big
  3. Confirm the deprecated-html finding for rule big-element.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

Moderate axe skip-link Best Practice The skip-link target should exist and be focusable (WCAG criterion undetermined) 19/1667 pages · 19 instances Likely template
Bug ID
VS-dbc4f0ec
Pattern ID
VS-4edfe386
Combined ID
VS-dbc4f0ec (pattern VS-4edfe386) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
a[href$="#az"]
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<a href="#az" class="skippy" title="Salte directo al listado de A-Z">Salte directo al listado de A-Z</a>

Description

The skip-link target should exist and be focusable. Detected by axe-core rule skip-link on 19 of 1667 scanned pages (19 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm.
  2. Locate the element: a[href$="#az"]
  3. Confirm the axe-core finding for rule skip-link.

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: Ensure the skip link targets a real, focusable element (its href must match an existing id).

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

Moderate alfa sia-r60 Undetermined Input purpose can be determined (WCAG criterion undetermined) 16/1667 pages · 16 instances Likely template
Bug ID
VS-8812289d
Pattern ID
VS-3fb891c5
Combined ID
VS-8812289d (pattern VS-3fb891c5) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<fieldset>
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

Description

Input purpose can be determined. Detected by Siteimprove Alfa rule sia-r60 on 16 of 1667 scanned pages (16 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm.
  2. Locate the element: <fieldset>
  3. Confirm the Siteimprove Alfa finding for rule sia-r60.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Moderate axe scope-attr-valid Best Practice scope attribute should be used correctly (WCAG criterion undetermined) 15/1667 pages · 260 instances Likely template
Bug ID
VS-5d2ce77a
Pattern ID
VS-0ba8ce9d
Combined ID
VS-5d2ce77a (pattern VS-0ba8ce9d) — 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
td:nth-child(1)
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<td scope="col"><strong>Percentage and number of women 15-49 years of age (of all marital statuses) who have impaired fecundity (i.e., who are not surgically sterile, and for whom it is difficult or i

Description

scope attribute should be used correctly. Detected by axe-core rule scope-attr-valid on 15 of 1667 scanned pages (260 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm.
  2. Locate the element: td:nth-child(1)
  3. Confirm the axe-core finding for rule scope-attr-valid.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

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

Minor axe empty-heading Best Practice Headings should not be empty (WCAG criterion undetermined) 11/1667 pages · 21 instances Likely template
Bug ID
VS-c42709bb
Pattern ID
VS-0066c67d
Combined ID
VS-c42709bb (pattern VS-0066c67d) — 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
li:nth-child(2) > h3
History
first seen 2026-W24, last seen 2026-W27 (4 wk)

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

<h3></h3>

Description

Headings should not be empty. Detected by axe-core rule empty-heading on 11 of 1667 scanned pages (21 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5715a5.htm.
  2. Locate the element: li:nth-child(2) > h3
  3. Confirm the axe-core finding for rule empty-heading.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

Testing environment

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

Suggested fix

How to fix: Remove empty headings or give them text. Don't use heading tags for spacing.

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

23 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 <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 10
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 9
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 8
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 6
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 4
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 4
Moderate Table cell has header (WCAG 1.3.1) [sia-r77] WCAG 2.0 A 3
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 3
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 3
Moderate Scrollable element is keyboard accessible (WCAG 1.4.8) [sia-r80] WCAG 2.x AAA 2
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 2
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 2
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] Undetermined 2
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 2
Moderate Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 1
Moderate Banner landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-banner-is-top-level] Best Practice 1
Moderate Document has a title element (WCAG 2.4.2) [sia-r1] WCAG 2.0 A 1
Moderate Document should not have more than one banner landmark (WCAG criterion undetermined) [landmark-no-duplicate-banner] Best Practice 1
Moderate Element role is consistent with ARIA landmark (WCAG criterion undetermined) [sia-r72] Undetermined 1
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 1
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] WCAG 2.0 A 1
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 1
Moderate Obsolete <blink> element (WCAG criterion undetermined) [blink-element] Undetermined 1

Deque axe-core findings

Rule-level axe-core summary (31 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-W27, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 1580 12091 /lab-training
/swine-flu/php/guidance/case-definitions-influenza-a-h3n2v-virus.html
/niosh/docket/archive/docket229A.html		 all 1580 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 536 760 /niosh/docket/archive/docket229A.html
/nchs/nsfg/key_statistics/i-keystat.htm
/pcd/issues/2012/11_0127_es.htm		 all 536 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 475 478 /lab-training
/restaurant-food-safety/php/practices/index.html
/flu/prevent/keyfacts.htm		 all 475 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 426 426 /pcd/issues/2012/11_0127_es.htm
/mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2012/11_0260_es.htm		 all 426 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 372 545 /pcd/issues/2012/11_0127_es.htm
/mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2012/11_0260_es.htm		 all 372 pages (CSV)
Images must have alternative text [image-alt] critical 352 3273 /mmwr/preview/mmwrhtml/00050429.htm
/mmwr/preview/mmwrhtml/00001976.htm
/pcd/issues/2008/oct/07_0169_fr.htm		 all 352 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 333 333 /mmwr/preview/mmwrhtml/00050429.htm
/mmwr/preview/mmwrhtml/00001976.htm
/pcd/issues/2008/oct/07_0169_fr.htm		 all 333 pages (CSV)
Links must have discernible text [link-name] serious 120 235 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/pcd/issues/2008/oct/07_0169_fr.htm		 all 120 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 94 94 /vitalsigns/hepc-treatment/index.html
/niosh/anthrax/site.html
/niosh/twh/site.html		 all 94 pages (CSV)
Form elements should have a visible label [label-title-only] serious 67 67 /pcd/issues/2008/oct/07_0169_fr.htm
/pcd/issues/2008/jan/07_0154_fr.htm
/pcd/issues/2008/jan/06_0153_zhs.htm		 all 67 pages (CSV)
Form elements must have labels [label] critical 65 65 /mmwr/preview/mmwrhtml/mm6019a2.htm
/mmwr/preview/mmwrhtml/mm5907a5.htm
/mmwr/preview/mmwrhtml/mm5902a3.htm		 all 65 pages (CSV)
Table header text should not be empty [empty-table-header] minor 29 396 /nchs/nsfg/key_statistics/i-keystat.htm
/mmwr/preview/mmwrhtml/mm5827a4.htm
/pcd/issues/2008/oct/08_0060_es.htm		 all 29 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 29 38 /vitalsigns/hepc-treatment/index.html
/spanish/NIOSH/docs/wp-solutions/2010-113_sp
/spanish/NIOSH/docs/2005-155_sp		 all 29 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 25 39 /infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html
/hepatitis/php/npr-2025/hep-b-reduce-deaths-api.html
/vaccine-safety/vaccines/hepatitis-b.html		 all 25 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 25 31 /infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html
/mmwr/preview/mmwrhtml/00016174.htm
/mmwr/preview/mmwrhtml/00020301.htm		 all 25 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 19 19 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/pcd/issues/2012/11_0117_es.htm		 all 19 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 15 260 /nchs/nsfg/key_statistics/i-keystat.htm
/hepatitis/php/surveillance-guidance/general-surveillance.html
/flu/hcp/vaccine-supply/2022-2023.html		 all 15 pages (CSV)
Frames must have an accessible name [frame-title] serious 13 42 /global-hiv-tb/php/resources/video.html
/tobacco/php/multimedia-and-tools/mcrc-overview.html
/diabetes-state-local/php/strategy-resources/screening-testing-and-referral.html		 all 13 pages (CSV)
Headings should not be empty [empty-heading] minor 11 21 /mmwr/preview/mmwrhtml/mm5715a5.htm
/mmwr/preview/mmwrhtml/mm5615a6.htm
/nchs/nsfg/nsfg_combining_data.htm		 all 11 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 9 12 /mmwr/preview/mmwrhtml/rr5407a1.htm
/mmwr/preview/mmwrhtml/mm5650a6.htm
/mmwr/preview/mmwrhtml/mm5701a8.htm		 all 9 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 6 8 /ncird/surveillance/respiratory-illnesses/index.html
/brfss/acbs/2024/prevalence_tables/table3_LLCP.html
/childvaxview/publications-resources/nis-child-2016-2018.html		 all 6 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 5 14 /tb/hcp/treatment/tuberculosis-disease.html
/tb-programs/php/evaluation/diabetes-example.html
/fluview/surveillance/2026-week-07.html		 all 5 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 4 48 /hepatitis/php/npr-2025/hep-b-reduce-deaths-api.html
/hepatitis/php/npr-2023/hep-c-reduce-infections.html
/hepatitis/php/npr-2025/hep-b-reduce-deaths.html		 all 4 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 3 10 /nhsn/training/continuing-edu/cbts.html
/niosh/ocas
/alcohol/ardi/methods.html		 all 3 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 2 18 /typhoid-fever/prevention/index.html
/group-b-strep/es/prevention/prevencion-enfermedad-por-estreptococo-grupo-b-recien-nacidos.html		 all 2 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 2 2 /mmwr/volumes/66/wr/mm6627a1.htm
/nchs/deaths.htm		 all 2 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 1 14 /nhsn/training/continuing-edu/cbts.html all 1 pages (CSV)
Select element must have an accessible name [select-name] critical 1 3 /nchs/hus/data-finder.htm all 1 pages (CSV)
Banner landmark should not be contained in another landmark [landmark-banner-is-top-level] moderate 1 1 /niosh/newsroom/feature/needlestick_disposal.html all 1 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner] moderate 1 1 /niosh/newsroom/feature/needlestick_disposal.html all 1 pages (CSV)
Documents must have <title> element to aid in navigation [document-title] serious 1 1 /mmwr/preview/mmwrhtml/mm5906a6.htm all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (37 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-W27, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 781 23048 /restaurant-food-safety/php/practices/index.html
/nchs/nsfg/key_statistics/i-keystat.htm
/ecoli/outbreaks/map-organic-walnuts-04-24.html		 all 781 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 634 20477 /restaurant-food-safety/php/practices/index.html
/nchs/nsfg/key_statistics/i-keystat.htm
/ecoli/outbreaks/map-organic-walnuts-04-24.html		 all 634 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 556 8111 /restaurant-food-safety/php/practices/index.html
/nchs/nsfg/key_statistics/i-keystat.htm
/ecoli/outbreaks/map-organic-walnuts-04-24.html		 all 556 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 391 404 /restaurant-food-safety/php/practices/index.html
/ecoli/outbreaks/map-organic-walnuts-04-24.html
/pcd/issues/2012/11_0127_es.htm		 all 391 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 297 37668 /pcd/issues/2012/11_0127_es.htm
/mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2012/11_0260_es.htm		 all 297 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 292 19489 /restaurant-food-safety/php/practices/index.html
/pcd/issues/2012/11_0127_es.htm
/mmwr/preview/mmwrhtml/00050429.htm		 all 292 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 285 2638 /nchs/nsfg/key_statistics/i-keystat.htm
/mmwr/preview/mmwrhtml/00050429.htm
/flu/spotlights/2020-2021/pediatric-flu-deaths.htm		 all 285 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 273 370 /nchs/nsfg/key_statistics/i-keystat.htm
/pcd/issues/2012/11_0127_es.htm
/mmwr/preview/mmwrhtml/00050429.htm		 all 273 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 248 1395 /restaurant-food-safety/php/practices/index.html
/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html
/physical-activity/features/10-reasons-to-get-moving.html		 all 248 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 215 215 /mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2008/jan/07_0154_fr.htm
/mmwr/preview/mmwrhtml/mm5907a5.htm		 all 215 pages (CSV)
Image has accessible name [sia-r2] n/a 190 1664 /mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2008/jan/07_0154_fr.htm
/mmwr/preview/mmwrhtml/mm5518a6.htm		 all 190 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 177 177 /mmwr/preview/mmwrhtml/00050429.htm
/pcd/issues/2008/jan/07_0154_fr.htm
/mmwr/preview/mmwrhtml/mm5518a6.htm		 all 177 pages (CSV)
Form field label is visible [sia-r61] n/a 90 90 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/niosh/anthrax/site.html		 all 90 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 80 1062 /ecoli/outbreaks/map-organic-walnuts-04-24.html
/hymenolepis/hcp/clinical-care/index.html
/physical-activity/features/10-reasons-to-get-moving.html		 all 80 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 78 132 /ecoli/outbreaks/map-organic-walnuts-04-24.html
/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html
/nis/about/index.html		 all 78 pages (CSV)
Table header has scope [sia-r78] n/a 68 84 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/flu/spotlights/2020-2021/pediatric-flu-deaths.htm		 all 68 pages (CSV)
Link has accessible name [sia-r11] n/a 64 127 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/pcd/issues/2008/jan/07_0154_fr.htm		 all 64 pages (CSV)
Form field has accessible name [sia-r8] n/a 31 33 /mmwr/preview/mmwrhtml/mm5907a5.htm
/mmwr/index2006.htm
/mmwr/preview/mmwrhtml/mm6018a3.htm		 all 31 pages (CSV)
Input purpose can be determined [sia-r60] n/a 16 16 /pcd/issues/2012/11_0127_es.htm
/pcd/issues/2012/11_0260_es.htm
/pcd/issues/2012/11_0117_es.htm		 all 16 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 9 19 /mmwr/preview/mmwrhtml/00032737.htm
/mmwr/preview/mmwrhtml/00022160.htm
/mmwr/preview/mmwrhtml/00035643.htm		 all 9 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 8 8 /ecoli/outbreaks/map-organic-walnuts-04-24.html
/sti/php/projects/ssun.html
/cogh/ihregulations.htm		 all 8 pages (CSV)
Element has required aria-owns [sia-r46] n/a 6 44 /nchs/nsfg/key_statistics/i-keystat.htm
/phlp/php/publications/pneumococcal-vaccination-laws-ambulatory-facilities.html
/hepatitis/php/surveillance-guidance/general-surveillance.html		 all 6 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 4 36 /ncird/surveillance/respiratory-illnesses/index.html
/brfss/acbs/2024/prevalence_tables/table3_LLCP.html
/childvaxview/publications-resources/nis-child-2016-2018.html		 all 4 pages (CSV)
Element has required owned roles [sia-r64] n/a 4 4 /mmwr/preview/mmwrhtml/mm5115a2.htm
/mmwr/preview/mmwrhtml/mm5113a5.htm
/mmwr/preview/mmwrhtml/mm5135a3.htm		 all 4 pages (CSV)
Table cell has header [sia-r77] n/a 3 35 /nchs/nsfg/key_statistics/i-keystat.htm
/hepatitis/php/surveillance-guidance/general-surveillance.html
/nchs/deaths.htm		 all 3 pages (CSV)
Button has accessible name [sia-r12] n/a 3 25 /hepatitis/php/npr-2023/hep-c-reduce-infections.html
/hepatitis/php/npr-2025/hep-b-reduce-deaths.html
/vitalsigns/topics.html		 all 3 pages (CSV)
Form field error is identified and described [sia-r75] n/a 3 20 /mmwr/preview/mmwrhtml/mm5916a3.htm
/mmwr/preview/mmwrhtml/mm5914a3.htm
/mmwr/preview/mmwrhtml/mm5924a5.htm		 all 3 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 2 19 /pcd/issues/2008/jan/toc.htm
/pcd/current_issue.htm		 all 2 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 2 8 /nhsn/training/continuing-edu/cbts.html
/alcohol/ardi/methods.html		 all 2 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 2 2 /mmwr/volumes/65/wr/mm6549md.htm
/mmwr/volumes/65/wr/mm6525md.htm		 all 2 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 2 2 /hepatitis/php/npr-2023/hep-c-reduce-infections.html
/hepatitis/php/npr-2025/hep-b-reduce-deaths.html		 all 2 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 1 13 /mmwr/volumes/65/wr/mm6540a10.htm all 1 pages (CSV)
sia-r76 n/a 1 1 /ncird/surveillance/respiratory-illnesses/index.html all 1 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 1 1 /niosh/newsroom/feature/needlestick_disposal.html all 1 pages (CSV)
Element role is consistent with ARIA landmark [sia-r72] n/a 1 1 /nchs/covid19/pulse/functioning-and-disability.htm all 1 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 1 1 /nchs/deaths.htm all 1 pages (CSV)
Document has a title element [sia-r1] n/a 1 1 /mmwr/preview/mmwrhtml/mm5906a6.htm all 1 pages (CSV)

Unique accessibility issues (axe + Alfa consolidated)

axe and Alfa both implement W3C ACT rules, so the same issue is often caught by both. These are deduplicated by ACT rule and page, so a shared finding counts once (9442 raw engine findings → 8969 unique).

Unique issues (rule × page)
8969
Caught by both engines
473 highest confidence
axe only
4149
Alfa only
4347
8 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-W27, by pages affected.
IssuePagesRule references
Images must have alternative text352axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute333axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Links must have discernible text120axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels66axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty11axe empty-heading · Alfa sia-r64 · ACT ffd0e9
Table cell headers attributes must refer to other <th> elements in the same table6axe td-headers-attr · Alfa sia-r45 · ACT a25f45
ARIA commands must have an accessible name5axe aria-command-name · Alfa sia-r12 · ACT 97a4e1
Documents must have <title> element to aid in navigation1axe document-title · Alfa sia-r1 · ACT 2779a5