vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W28

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 2.5.5 902 1
1.4.6 WCAG 1.4.6 738 1
1.4.3 Contrast (Minimum) 693 2
1.4.8 WCAG 1.4.8 663 3
1.1.1 Non-text Content (images, icons) 601 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 ~367 finding(s) on 367 page(s).
XPath / selector: html
<html>
 Serious 367 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 ~185 finding(s) on 185 page(s).
XPath / selector: <html>
 Moderate 185 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 ~420 finding(s) on 420 page(s).
XPath / selector: html
<html>
 Moderate 420 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 ~74 finding(s) on 74 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="Insertar e-mail" value="Insertar e-mail" onfocus="this.value=''">
 Serious 74 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 ~110 finding(s) on 110 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--content">
 Moderate 110 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
aria attribute is permitted for element role · unattributed component
Fix one place, resolve ~413 finding(s) on 413 page(s).
XPath / selector: @aria-label="Official website of the United States government"
 Moderate 413 Requires manual testing. Only use ARIA states/properties that are allowed on this element/role. pages (CSV)
No obsolete or deprecated elements are used · unattributed component
Fix one place, resolve ~149 finding(s) on 149 page(s).
XPath / selector: {"type":"document","children":[{"type":"element","children":[{"type":"element","
 Moderate 149 Requires manual testing. See remediation guidance: https://alfa.siteimprove.com/rules/sia-r70 pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~302 finding(s) on 302 page(s).
XPath / selector: img[height="10"][alt=" "][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="1" height="10" alt=" " border="0">
 Critical 302 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~600 finding(s) on 300 page(s).
XPath / selector: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">
 Critical 300 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) c · unattributed component
Fix one place, resolve ~496 finding(s) on 496 page(s).
XPath / selector: .page-right-rail__static
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
 Moderate 496 Requires manual testing. When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. "Primary" and "Footer" navigation) so screen-reader users can tell them apart. pages (CSV)

Bug reports

31 issue type(s) are shown by default out of 75 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 6 critical, 17 serious, 48 moderate, 4 minor. By WCAG category: 34 WCAG 2.0 A, 3 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 5 WCAG 2.x AAA, 12 Best Practice, 19 Undetermined. Ordered by severity, key-page impact, WCAG level, and prevalence. Following accessibility bug-reporting best practices. Download: Markdown · JSON (full archive) · JSON (AI diagnostic) · CSV (all findings) · Priority pages CSV · Priority pages JSON.

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

The 50 highest-priority findings are shown in full; 25 more lower-priority finding(s) are summarised at the end of the page, and every finding is in the CSV/JSON downloads.

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

Findings needing review

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

Serious axe color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 430/1967 pages · 682 instances Likely template
Bug ID
VS-428b67b7
Pattern ID
VS-be8d563e
Combined ID
VS-428b67b7 (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
a[name="content_area"] > font[color="red"]
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 430 of 1967 scanned pages (682 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: a[name="content_area"] > font[color="red"]
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 430 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) 400/1967 pages · 3587 instances Likely template
Bug ID
VS-d0c14f51
Pattern ID
VS-9074b4dd
Combined ID
VS-d0c14f51 (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-W28 (5 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 400 of 1967 scanned pages (3587 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 400 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) 367/1967 pages · 367 instances Likely template
Bug ID
VS-fb332ded
Pattern ID
VS-c126b6a6
Combined ID
VS-fb332ded (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-W28 (5 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 367 of 1967 scanned pages (367 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 367 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) 119/1967 pages · 226 instances Likely template
Bug ID
VS-1a297e58
Pattern ID
VS-e9fe47ac
Combined ID
VS-1a297e58 (pattern VS-e9fe47ac) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

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

Description

Links must have discernible text. Detected by axe-core rule link-name on 119 of 1967 scanned pages (226 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2005/nov/05_0082_es.htm.
  2. Locate the element: table[cellpadding="0"]:nth-child(2) > tbody > tr > td[width="140"] > a[href$="cdc.gov/"]
  3. Confirm the axe-core finding for rule link-name against WCAG 2.4.4 Link Purpose (In Context).

Impact

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

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

Affected pages

…and more — all 119 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) 92/1967 pages · 100 instances Likely template
Bug ID
VS-ca01f44b
Pattern ID
VS-fafffee0
Combined ID
VS-ca01f44b (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-W28 (5 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 92 of 1967 scanned pages (100 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6129md.htm?s_cid=mm6129md_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 92 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) 33/1967 pages · 34 instances Likely template
Bug ID
VS-db2d8ab9
Pattern ID
VS-8ade3360
Combined ID
VS-db2d8ab9 (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-W28 (5 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 33 of 1967 scanned pages (34 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

…and more — all 33 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 26/1967 pages · 36 instances Likely template
Bug ID
VS-62c1d671
Pattern ID
VS-a0bdbdf6
Combined ID
VS-62c1d671 (pattern VS-a0bdbdf6) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
ol
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<ol type="1">

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 26 of 1967 scanned pages (36 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00017358.htm.
  2. Locate the element: ol
  3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 26 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 12/1967 pages · 14 instances Likely template
Bug ID
VS-d394430c
Pattern ID
VS-3f76c7ea
Combined ID
VS-d394430c (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
iframe
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/xEHx1Kikqe0?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 12 of 1967 scanned pages (14 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 10/1967 pages · 30 instances Likely template
Bug ID
VS-36a8679d
Pattern ID
VS-fab92378
Combined ID
VS-36a8679d (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-W28 (4 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 10 of 1967 scanned pages (30 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/hus/data-finder.htm?subject=HIV.
  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 blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 8/1967 pages · 8 instances
Bug ID
VS-83b25149
Pattern ID
VS-4b45acfe
Combined ID
VS-83b25149 (pattern VS-4b45acfe) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.2.2 Pause, Stop, Hide (Level A, WCAG 2.0)
XPath / selector
blink
History
first seen 2026-W25, last seen 2026-W28 (4 wk)

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

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

Description

<blink> elements are deprecated and must not be used. Detected by axe-core rule blink on 8 of 1967 scanned pages (8 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5614a3.htm.
  2. Locate the element: blink
  3. Confirm the axe-core finding for rule blink against WCAG 2.2.2 Pause, Stop, Hide.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 6/1967 pages · 7 instances
Bug ID
VS-e18ce16f
Pattern ID
VS-c613c153
Combined ID
VS-e18ce16f (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
.dataTables_scrollBody
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<div class="dataTables_scrollBody" style="position: relative; overflow: auto; max-height: 400px; width: 100%;">

Description

Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 6 of 1967 scanned pages (7 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hepatitis-surveillance-2023/hepatitis-c/table-3-7.html.
  2. Locate the element: .dataTables_scrollBody
  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 nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 4/1967 pages · 16 instances
Bug ID
VS-ae3172c4
Pattern ID
VS-58301a87
Combined ID
VS-ae3172c4 (pattern VS-58301a87) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#acc-header-2
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

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

Description

Interactive controls must not be nested. Detected by axe-core rule nested-interactive on 4 of 1967 scanned pages (16 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/tobacco/campaign/tips/groups/african-american.html.
  2. Locate the element: #acc-header-2
  3. Confirm the axe-core finding for rule nested-interactive against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 3/1967 pages · 22 instances
Bug ID
VS-7fb2fac8
Pattern ID
VS-5c82bd60
Combined ID
VS-7fb2fac8 (pattern VS-5c82bd60) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
table[aria-rowcount="54"] > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W28 (5 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 3 of 1967 scanned pages (22 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/art/php/surveillance-state-specific/index.html.
  2. Locate the element: table[aria-rowcount="54"] > thead > tr > th:nth-child(1) > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 2/1967 pages · 21 instances Likely content
Bug ID
VS-01ba3f35
Pattern ID
VS-6175596b
Combined ID
VS-01ba3f35 (pattern VS-6175596b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
.table-row.row[role="row"]:nth-child(1) > .table-col[data-col="2"][role="cell"] > li:nth-child(1)
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<li>Swelling or soreness where the vaccine provider gave the vaccine</li>

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 2 of 1967 scanned pages (21 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 2/1967 pages · 6 instances Likely content
Bug ID
VS-c586345f
Pattern ID
VS-dd1c019f
Combined ID
VS-c586345f (pattern VS-dd1c019f) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
3.1.2 Language of Parts (Level AA, WCAG 2.0)
XPath / selector
.image-container.aspect-ratio-16-9 > a[lang="urd"]
History
first seen 2026-W24, last seen 2026-W28 (3 wk)

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

<a href="/cholera/media/pdfs/Cholera_5-Basic-Prevention-Steps_Urdu.pdf" title="Cholera-5 Basic Prevention Steps (Urdu)" lang="urd"><img src="/cholera/media/images/Cholera-5-Basic-Prevention-Steps-Urdu

Description

lang attribute must have a valid value. Detected by axe-core rule valid-lang on 2 of 1967 scanned pages (6 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/cholera/prevention/index.html.
  2. Locate the element: .image-container.aspect-ratio-16-9 > a[lang="urd"]
  3. Confirm the axe-core finding for rule valid-lang against WCAG 3.1.2 Language of Parts.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Serious axe 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) 2/1967 pages · 5 instances Likely content
Bug ID
VS-0c2a8710
Pattern ID
VS-07ba3b17
Combined ID
VS-0c2a8710 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
div[role="tablist"]:nth-child(1) > div[role="tabpanel"]:nth-child(2) > .opt-in.table-bordered.table-sm
History
first seen 2026-W25, last seen 2026-W28 (4 wk)

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

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

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 2 of 1967 scanned pages (5 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/dpdx/diagnosticprocedures/stool/morphcomp.html.
  2. Locate the element: div[role="tablist"]:nth-child(1) > div[role="tabpanel"]:nth-child(2) > .opt-in.table-bordered.table-sm
  3. Confirm the axe-core finding for rule td-headers-attr against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-input-field-name WCAG 2.0 A ARIA input fields must have an accessible name (WCAG 4.1.2) 2/1967 pages · 4 instances Likely content
Bug ID
VS-58a12614
Pattern ID
VS-0841abc2
Combined ID
VS-58a12614 (pattern VS-0841abc2) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
.rc-slider-handle-1
History
first seen 2026-W25, last seen 2026-W28 (2 wk)

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

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

Description

ARIA input fields must have an accessible name. Detected by axe-core rule aria-input-field-name on 2 of 1967 scanned pages (4 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Critical axe area-alt WCAG 2.0 A Active <area> elements must have alternative text (WCAG 2.4.4) 1/1967 pages · 7 instances Likely content
Bug ID
VS-17ef08aa
Pattern ID
VS-4e469a59
Combined ID
VS-17ef08aa (pattern VS-4e469a59) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.4 Link Purpose (In Context) (Level A, WCAG 2.0)
XPath / selector
area[coords="363, 731, 426, 764"]
History
first seen 2026-W28, last seen 2026-W28 (1 wk)

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

<area href="http://www.cdc.gov/std/treatment" shape="rect" coords="363, 731, 426, 764">

Description

Active <area> elements must have alternative text. Detected by axe-core rule area-alt on 1 of 1967 scanned pages (7 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5614a3.htm.
  2. Locate the element: area[coords="363, 731, 426, 764"]
  3. Confirm the axe-core finding for rule area-alt against WCAG 2.4.4 Link Purpose (In Context).

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Critical axe aria-required-children WCAG 2.0 A Certain ARIA roles must contain particular children (WCAG 1.3.1) 1/1967 pages · 2 instances Likely content
Bug ID
VS-dd05ed2d
Pattern ID
VS-9429bb8d
Combined ID
VS-dd05ed2d (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
div[role="tablist"]:nth-child(1)
History
first seen 2026-W25, last seen 2026-W28 (4 wk)

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

<div id="accord" role="tablist">

Description

Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 1967 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/dpdx/diagnosticprocedures/stool/morphcomp.html.
  2. Locate the element: div[role="tablist"]:nth-child(1)
  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 button-name WCAG 2.0 A Buttons must have discernible text (WCAG 4.1.2) 1/1967 pages · 1 instances Likely content
Bug ID
VS-c768634b
Pattern ID
VS-e7298c00
Combined ID
VS-c768634b (pattern VS-e7298c00) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#search__icon
History
first seen 2026-W26, last seen 2026-W28 (2 wk)

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

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

Description

Buttons must have discernible text. Detected by axe-core rule button-name on 1 of 1967 scanned pages (1 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe aria-prohibited-attr WCAG 2.0 A Elements must only use permitted ARIA attributes (WCAG 4.1.2) 1/1967 pages · 1 instances Likely content
Bug ID
VS-af5a4308
Pattern ID
VS-ebb1c464
Combined ID
VS-af5a4308 (pattern VS-ebb1c464) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
#UNIQUE27403686429c066f58
History
first seen 2026-W28, last seen 2026-W28 (1 wk)

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

<div class="cdc-card-slider cdc-video-slider slick-initialized slick-slider cdc-carousel-slider" id="UNIQUE27403686429c066f58" aria-label="Carousel">

Description

Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 1 of 1967 scanned pages (1 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/stophivtogether/hiv-treatment/index.html.
  2. Locate the element: #UNIQUE27403686429c066f58
  3. Confirm the axe-core finding for rule aria-prohibited-attr against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 1783/1967 pages · 13152 instances Likely template
Bug ID
VS-c85713fd
Pattern ID
VS-f18df681
Combined ID
VS-c85713fd (pattern VS-f18df681) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
img[width="5"]
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

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

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 1783 of 1967 scanned pages (13152 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: img[width="5"]
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 1783 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) 74/1967 pages · 74 instances Likely template
Bug ID
VS-5c992797
Pattern ID
VS-33841929
Combined ID
VS-5c992797 (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-W28 (5 wk)

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

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

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 74 of 1967 scanned pages (74 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2005/nov/05_0082_es.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 74 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) 338/1967 pages · 3643 instances Likely template
Bug ID
VS-60fa70e9
Pattern ID
VS-179ad9b3
Combined ID
VS-60fa70e9 (pattern VS-179ad9b3) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.2 AA
Obligation
required
Handling
review
WCAG SC
2.5.8 Target Size (Minimum) (Level AA, WCAG 2.2)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 338 of 1967 scanned pages (3643 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: <a href="#content_area">
  3. Confirm the Siteimprove Alfa finding for rule sia-r113 against WCAG 2.5.8 Target Size (Minimum).

Impact

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

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

Affected pages

…and more — all 338 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) 263/1967 pages · 1509 instances · possible duplicate Likely template
Bug ID
VS-f3a5f01b
Pattern ID
VS-f7e99f4b
Combined ID
VS-f3a5f01b (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-W28 (5 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-428b67b7 (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 263 of 1967 scanned pages (1509 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.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 263 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) 201/1967 pages · 1681 instances · possible duplicate Likely template
Bug ID
VS-394e6abc
Pattern ID
VS-a24eaa8c
Combined ID
VS-394e6abc (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-W28 (5 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-d0c14f51 (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 201 of 1967 scanned pages (1681 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 201 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) 185/1967 pages · 185 instances · possible duplicate Likely template
Bug ID
VS-4128f76c
Pattern ID
VS-7a0e5645
Combined ID
VS-4128f76c (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-W28 (5 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-fb332ded (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 185 of 1967 scanned pages (185 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 185 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) 114/1967 pages · 1634 instances Likely template
Bug ID
VS-57a50388
Pattern ID
VS-d6097011
Combined ID
VS-57a50388 (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-W28 (5 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 114 of 1967 scanned pages (1634 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/icd/icd-10/index.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 114 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) 86/1967 pages · 135 instances Likely template
Bug ID
VS-5695c2b6
Pattern ID
VS-f7dba940
Combined ID
VS-5695c2b6 (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="/forecast-outbreak-analytics/index.html" class="cdc-footer__super-title" aria-label="Center for Forecasting and Outbreak Analytics">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 86 of 1967 scanned pages (135 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html.
  2. Locate the element: <a href="/forecast-outbreak-analytics/index.html" class="cdc-footer__super-title" aria-label="Center for Forecasting and Outbreak Analytics">
  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 86 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-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 55/1967 pages · 88 instances Likely template
Bug ID
VS-191c54d2
Pattern ID
VS-a48e6078
Combined ID
VS-191c54d2 (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
<select id="year_group" class="filter_dropdowns" style="width:100%">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 55 of 1967 scanned pages (88 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/hus/data-finder.htm?subject=HIV.
  2. Locate the element: <select id="year_group" class="filter_dropdowns" style="width:100%">
  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 55 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 54/1967 pages · 112 instances Likely template
Bug ID
VS-47eba2dc
Pattern ID
VS-28ebd979
Combined ID
VS-47eba2dc (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="/forecast-outbreak-analytics/contact/contact-us.html">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 54 of 1967 scanned pages (112 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html.
  2. Locate the element: <a href="/forecast-outbreak-analytics/contact/contact-us.html">
  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 54 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-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 902/1967 pages · 28657 instances Likely template
Bug ID
VS-abf802f5
Pattern ID
VS-cb53cc4d
Combined ID
VS-abf802f5 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<a href="#content_area">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 902 of 1967 scanned pages (28657 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: <a href="#content_area">
  3. Confirm the Siteimprove Alfa finding for rule sia-r111 against WCAG 2.5.5 Target Size (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 902 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) 738/1967 pages · 24800 instances Likely template
Bug ID
VS-a1762737
Pattern ID
VS-646b1e0b
Combined ID
VS-a1762737 (pattern VS-646b1e0b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.6 Contrast (Enhanced) (Level AAA, WCAG 2.0)
XPath / selector
text: "An official website of the United States government "
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 738 of 1967 scanned pages (24800 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/73/wr/mm7301a5.htm?s_cid=mm7301a5_w.
  2. Locate the element: text: "An official website of the United States government "
  3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 738 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) 651/1967 pages · 9363 instances Likely template
Bug ID
VS-154aa047
Pattern ID
VS-c18be945
Combined ID
VS-154aa047 (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: "An official website of the United States government "
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 651 of 1967 scanned pages (9363 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/73/wr/mm7301a5.htm?s_cid=mm7301a5_w.
  2. Locate the element: text: "An official website of the United States government "
  3. Confirm the Siteimprove Alfa finding for rule sia-r57.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 651 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) 614/1967 pages · 867 instances Likely template
Bug ID
VS-11121256
Pattern ID
VS-d25f622d
Combined ID
VS-11121256 (pattern VS-d25f622d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
h3:nth-child(8)
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<h3>Editorial Note</h3>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 614 of 1967 scanned pages (867 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: h3:nth-child(8)
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 614 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) 501/1967 pages · 520 instances Likely template
Bug ID
VS-0da34cf0
Pattern ID
VS-8806389c
Combined ID
VS-0da34cf0 (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-W28 (5 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 501 of 1967 scanned pages (520 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html.
  2. Locate the element: .page-right-rail__static
  3. Confirm the axe-core finding for rule landmark-unique.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 501 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) 496/1967 pages · 496 instances Likely template
Bug ID
VS-d463b92c
Pattern ID
VS-d5d82446
Combined ID
VS-d463b92c (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-W28 (5 wk)

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

<html>

Description

Document should have one main landmark. Detected by axe-core rule landmark-one-main on 496 of 1967 scanned pages (496 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 496 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) 448/1967 pages · 457 instances Likely template
Bug ID
VS-2322da9c
Pattern ID
VS-e05344b9
Combined ID
VS-2322da9c (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-W28 (5 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 448 of 1967 scanned pages (457 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.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 448 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r74 WCAG 2.x AAA Link is distinguishable without relying on color (WCAG 1.4.8) 351/1967 pages · 49511 instances Likely template
Bug ID
VS-244e78f2
Pattern ID
VS-fbf54eba
Combined ID
VS-244e78f2 (pattern VS-fbf54eba) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 351 of 1967 scanned pages (49511 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: <p style="font-family: Arial, Helvetica, sans-serif; font-size: 8pt; color: #333333;">
  3. Confirm the Siteimprove Alfa finding for rule sia-r74 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 351 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) 315/1967 pages · 451 instances Likely template
Bug ID
VS-a24504a8
Pattern ID
VS-f054f4a4
Combined ID
VS-a24504a8 (pattern VS-f054f4a4) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
<h3>
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 315 of 1967 scanned pages (451 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: <h3>
  3. Confirm the Siteimprove Alfa finding for rule sia-r53.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 315 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r73 WCAG 2.x AAA Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) 310/1967 pages · 89048 instances Likely template
Bug ID
VS-d107c4c0
Pattern ID
VS-2208081b
Combined ID
VS-d107c4c0 (pattern VS-2208081b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p>
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 310 of 1967 scanned pages (89048 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.htm.
  2. Locate the element: <p>
  3. Confirm the Siteimprove Alfa finding for rule sia-r73 against WCAG 1.4.8 Visual Presentation.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 310 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r70 Undetermined No obsolete or deprecated elements are used (WCAG criterion undetermined) 240/1967 pages · 240 instances Likely template
Bug ID
VS-059bf6ba
Pattern ID
VS-3d033717
Combined ID
VS-059bf6ba (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-W28 (5 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 240 of 1967 scanned pages (240 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00000631.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 240 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 110/1967 pages · 110 instances Likely template
Bug ID
VS-c4a316c8
Pattern ID
VS-fa44f293
Combined ID
VS-c4a316c8 (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-W28 (5 wk)

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

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

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 110 of 1967 scanned pages (110 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 110 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) 95/1967 pages · 95 instances Likely template
Bug ID
VS-ef9348b0
Pattern ID
VS-7118fead
Combined ID
VS-ef9348b0 (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-W28 (5 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 95 of 1967 scanned pages (95 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5915a3.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 95 pages (CSV).

Testing environment

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

Suggested fix

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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 86/1967 pages · 95 instances Likely template
Bug ID
VS-cb637cf4
Pattern ID
VS-4fac2f41
Combined ID
VS-cb637cf4 (pattern VS-4fac2f41) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
img[role="presentation"]
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<img src="/niosh/media/images/2026/06/2013-122.jpg" alt="Handle Laundry Safely (Correctional Facilities)" role="presentation">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 86 of 1967 scanned pages (95 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/niosh/docs/2013-122.
  2. Locate the element: img[role="presentation"]
  3. Confirm the axe-core finding for rule aria-allowed-role.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 86 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 53/1967 pages · 55 instances Likely template
Bug ID
VS-bc387db4
Pattern ID
VS-2cd767ca
Combined ID
VS-bc387db4 (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
<h6 class="float-right">
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 53 of 1967 scanned pages (55 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/niosh/idlh/107028.html.
  2. Locate the element: <h6 class="float-right">
  3. Confirm the Siteimprove Alfa finding for rule sia-r78.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 53 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) 51/1967 pages · 16999 instances Likely template
Bug ID
VS-841c1c4d
Pattern ID
VS-04a9d28c
Combined ID
VS-841c1c4d (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-W28 (5 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 51 of 1967 scanned pages (16999 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00049725.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 51 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) 38/1967 pages · 225 instances Likely template
Bug ID
VS-0f8ba88a
Pattern ID
VS-91d2294a
Combined ID
VS-0f8ba88a (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-W28 (5 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 38 of 1967 scanned pages (225 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00049725.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 38 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) 34/1967 pages · 138 instances Likely template
Bug ID
VS-f1171cc1
Pattern ID
VS-d69fc059
Combined ID
VS-f1171cc1 (pattern VS-d69fc059) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
tr:nth-child(3) > th[scope="row"]
History
first seen 2026-W24, last seen 2026-W28 (5 wk)

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

<th class="l data" scope="row"></th>

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 34 of 1967 scanned pages (138 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/questionnaires/modules/category2016.htm.
  2. Locate the element: tr:nth-child(3) > th[scope="row"]
  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 34 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate deprecated-html big-element Undetermined Obsolete <big> element (use CSS) (WCAG criterion undetermined) 22/1967 pages · 25 instances Likely template
Bug ID
VS-ee035b32
Pattern ID
VS-7845739d
Combined ID
VS-ee035b32 (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-W28 (5 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 22 of 1967 scanned pages (25 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00049725.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.

25 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 Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 16
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 16
Minor Headings should not be empty (WCAG criterion undetermined) [empty-heading] Best Practice 13
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 8
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 8
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 7
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 6
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 6
Moderate Table cell has header (WCAG 1.3.1) [sia-r77] WCAG 2.0 A 5
Moderate Element has required aria-owns (WCAG 1.3.1) [sia-r46] WCAG 2.0 A 5
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 5
Moderate Form field error is identified and described (WCAG criterion undetermined) [sia-r75] Undetermined 3
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 3
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] 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 Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 2
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 2
Moderate Element role is consistent with ARIA landmark (WCAG criterion undetermined) [sia-r72] Undetermined 1
Moderate aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) [sia-r45] WCAG 2.0 A 1
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] WCAG 2.0 A 1
Moderate aria-hidden element does not contain focusable elements (WCAG 4.1.2) [sia-r17] WCAG 2.0 A 1
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 1
Moderate Keyboard (WCAG 2.1.1) [sia-r84] 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

Deque axe-core findings

Rule-level axe-core summary (33 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-W28, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 1783 13152 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/volumes/73/wr/mm7301a5.htm
/pcd/issues/2005/nov/05_0082_es.htm		 all 1783 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 614 867 /mmwr/preview/mmwrhtml/00000631.htm
/pcd/issues/2005/nov/05_0082_es.htm
/pcd/issues/2019/19_0017.htm		 all 614 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 501 520 /forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/nchs/icd/icd-10/index.html
/global-health/leadership/DGHT-Director.html		 all 501 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 496 496 /mmwr/preview/mmwrhtml/00000631.htm
/pcd/issues/2005/nov/05_0082_es.htm
/mmwr/preview/mmwrhtml/mm5540a8.htm		 all 496 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 430 682 /mmwr/preview/mmwrhtml/00000631.htm
/global-health/leadership/DGHT-Director.html
/mmwr/preview/mmwrhtml/mm5540a8.htm		 all 430 pages (CSV)
Images must have alternative text [image-alt] critical 400 3587 /mmwr/preview/mmwrhtml/00000631.htm
/pcd/issues/2005/nov/05_0082_es.htm
/mmwr/preview/mmwrhtml/mm5540a8.htm		 all 400 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 367 367 /mmwr/preview/mmwrhtml/00000631.htm
/pcd/issues/2005/nov/05_0082_es.htm
/mmwr/preview/mmwrhtml/mm5540a8.htm		 all 367 pages (CSV)
Links must have discernible text [link-name] serious 119 226 /pcd/issues/2005/nov/05_0082_es.htm
/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/mmwr/preview/mmwrhtml/mm5912a2.htm		 all 119 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 110 110 /meningitis/site.html
/about
/niosh/small-business/site.html		 all 110 pages (CSV)
Form elements must have labels [label] critical 92 100 /mmwr/preview/mmwrhtml/mm6129md.htm
/mmwr/preview/index84.html
/mmwr/preview/index89.html		 all 92 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 86 95 /niosh/docs/2013-122
/niosh/docs/2025-114
/niosh/publications/es/hcp/numbered/2012-122sp.html		 all 86 pages (CSV)
Form elements should have a visible label [label-title-only] serious 74 74 /pcd/issues/2005/nov/05_0082_es.htm
/pcd/issues/2009/jan/07_0263_fr.htm
/pcd/issues/2009/jan/07_0215_zht.htm		 all 74 pages (CSV)
Table header text should not be empty [empty-table-header] minor 34 138 /brfss/questionnaires/modules/category2016.htm
/niosh/idlh/107028.html
/mmwr/preview/mmwrhtml/mm6129md.htm		 all 34 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 33 34 /contraception/hcp/usspr/participants.html
/suicide/playbook/evidence-based-intervention-and-communication-resources.html
/contraception/hcp/usspr/changes-from-2016.html		 all 33 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 26 36 /mmwr/preview/mmwrhtml/00017358.htm
/mmwr/preview/mmwrhtml/00017268.htm
/mmwr/preview/mmwrhtml/00020077.htm		 all 26 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 16 16 /injury/wisqars
/niosh/docs/mining/works/coversheet1907.html
/pcd/issues/2012/11_0020_es.htm		 all 16 pages (CSV)
Headings should not be empty [empty-heading] minor 13 13 /mmwr/preview/mmwrhtml/mm5703a4.htm
/mmwr/preview/mmwrhtml/mm5326a3.htm
/niosh/idlh/idlhabb1.html		 all 13 pages (CSV)
Frames must have an accessible name [frame-title] serious 12 14 /cervical-cancer/symptoms/index.html
/bring-your-brave/risk-factors/index.html
/global-health-protection/php/campaigns-and-awareness/international-day-of-epidemic-preparedness.html		 all 12 pages (CSV)
Select element must have an accessible name [select-name] critical 10 30 /nchs/hus/data-finder.htm
/nchs/hus/data-finder.htm
/overdose-prevention/data-research/facts-stats/sudors-dashboard-fatal-overdose-data-accessible.html		 all 10 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 8 129 /pcd/issues/2016/16_0105.htm
/pcd/issues/2016/16_0071.htm
/bird-flu/php/technical-report/h5n1-122923.html		 all 8 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 8 8 /mmwr/preview/mmwrhtml/mm5614a3.htm
/mmwr/preview/mmwrhtml/rr4805a1.htm
/mmwr/preview/mmwrhtml/mm5631a5.htm		 all 8 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 6 7 /hepatitis-surveillance-2023/hepatitis-c/table-3-7.html
/prams/php/data-research/codebooks-phase-6.html
/nchs/data/hestat/hestat118.htm		 all 6 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 4 16 /tobacco/campaign/tips/groups/african-american.html
/tobacco/campaign/tips/quit-smoking/national-texting-portal.html
/niosh/motor-vehicle/long-haul-truck-drivers/index.html		 all 4 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 3 22 /art/php/surveillance-state-specific/index.html
/hepatitis-surveillance-2023/hepatitis-c/figure-3-7.html
/hepatitis-surveillance-2023/hepatitis-c/figure-3-1.html		 all 3 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 2 21 /tetanus/vaccines/index.html
/tobacco-health-equity/collection/regional-quitting-tobacco.html		 all 2 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 2 12 /nchs/hus/index.htm
/injury/wisqars		 all 2 pages (CSV)
lang attribute must have a valid value [valid-lang] serious 2 6 /cholera/prevention/index.html
/cholera/es/prevention/index.html		 all 2 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 2 5 /dpdx/diagnosticprocedures/stool/morphcomp.html
/vaccines/hcp/imz-schedules/adult-age.html		 all 2 pages (CSV)
ARIA input fields must have an accessible name [aria-input-field-name] serious 2 4 /overdose-prevention/data-research/facts-stats/dose-sys-accessible.html
/drugoverdose/nonfatal/dashboard/index.html		 all 2 pages (CSV)
Active <area> elements must have alternative text [area-alt] critical 1 7 /mmwr/preview/mmwrhtml/mm5614a3.htm all 1 pages (CSV)
Certain ARIA roles must contain particular children [aria-required-children] critical 1 2 /dpdx/diagnosticprocedures/stool/morphcomp.html all 1 pages (CSV)
Buttons must have discernible text [button-name] critical 1 1 /hiv/living-with/index.html all 1 pages (CSV)
Elements must only use permitted ARIA attributes [aria-prohibited-attr] serious 1 1 /stophivtogether/hiv-treatment/index.html all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (38 rule type(s))

Rule-level summary from Siteimprove Alfa (W3C ACT-based). Findings that overlap with axe-core on the same WCAG success criterion are noted as possible duplicates in the bug reports above.

Alfa rules failing in 2026-W28, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 902 28657 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/volumes/73/wr/mm7301a5.htm
/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html		 all 902 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 738 24800 /mmwr/volumes/73/wr/mm7301a5.htm
/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/nchs/icd/icd-10/index.html		 all 738 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 651 9363 /mmwr/volumes/73/wr/mm7301a5.htm
/forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/nchs/icd/icd-10/index.html		 all 651 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 448 457 /forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/nchs/icd/icd-10/index.html
/contraception/hcp/usspr/participants.html		 all 448 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 351 49511 /mmwr/preview/mmwrhtml/00000631.htm
/nchs/icd/icd-10/index.html
/mmwr/preview/mmwrhtml/ss5308a4.htm		 all 351 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 338 3643 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm
/niosh/idlh/107028.html		 all 338 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 315 451 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/volumes/72/wr/mm7215a3.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm		 all 315 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 310 89048 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm
/mmwr/preview/mmwrhtml/mm5915a3.htm		 all 310 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 263 1509 /forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/nchs/icd/icd-10/index.html
/overdose-prevention/php/interventions/public-health-safety-resources.html		 all 263 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 240 240 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm
/mmwr/preview/mmwrhtml/mm5915a3.htm		 all 240 pages (CSV)
Image has accessible name [sia-r2] n/a 201 1681 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm
/mmwr/preview/mmwrhtml/mm5614a3.htm		 all 201 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 185 185 /mmwr/preview/mmwrhtml/00000631.htm
/mmwr/preview/mmwrhtml/ss5308a4.htm
/mmwr/preview/mmwrhtml/mm5614a3.htm		 all 185 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 114 1634 /nchs/icd/icd-10/index.html
/environmental-health-practice/php/data-research/uncover-eh/index.html
/winter-weather/prevention/preventing-frostbite.html		 all 114 pages (CSV)
Form field label is visible [sia-r61] n/a 95 95 /mmwr/preview/mmwrhtml/mm5915a3.htm
/meningitis/site.html
/about		 all 95 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 86 135 /forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/niosh/publications/es/hcp/numbered/2012-122sp.html
/flu/es/highrisk/personas-con-mayor-riesgo.html		 all 86 pages (CSV)
Form field has accessible name [sia-r8] n/a 55 88 /nchs/hus/data-finder.htm
/nchs/hus/data-finder.htm
/mmwr/preview/index84.html		 all 55 pages (CSV)
Link has accessible name [sia-r11] n/a 54 112 /forecast-outbreak-analytics/impact/piloting-models-on-cdc-data-platforms-with-utah-health-officials.html
/mmwr/preview/mmwrhtml/mm5915a3.htm
/mmwr/preview/mmwrhtml/mm5614a3.htm		 all 54 pages (CSV)
Table header has scope [sia-r78] n/a 53 55 /niosh/idlh/107028.html
/cryptosporidium/prevention/preventing-and-controlling-crypto-childcare-facilities.html
/niosh/enews/enewsv23n1.html		 all 53 pages (CSV)
Input purpose can be determined [sia-r60] n/a 16 16 /mmwr/preview/mmwrhtml/mm5915a3.htm
/mmwr/preview/index84.html
/mmwr/preview/index89.html		 all 16 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 8 10 /typhoid-fever/reports/annual-summary-2020.html
/birth-defects/tracking/index.html
/art/php/surveillance-state-specific/index.html		 all 8 pages (CSV)
Button has accessible name [sia-r12] n/a 6 25 /hiv/living-with/index.html
/art/php/surveillance-state-specific/index.html
/hepatitis-surveillance-2023/hepatitis-c/figure-3-7.html		 all 6 pages (CSV)
Element has required owned roles [sia-r64] n/a 6 6 /mmwr/preview/mmwrhtml/mm5326a3.htm
/pcd/issues/2010/jul/09_0121_es.htm
/growthcharts		 all 6 pages (CSV)
Table cell has header [sia-r77] n/a 5 3095 /brfss/questionnaires/modules/state2023.htm
/dpdx/diagnosticprocedures/stool/morphcomp.html
/pcd/issues/2011/mar/10_0060.htm		 all 5 pages (CSV)
Element has required aria-owns [sia-r46] n/a 5 96 /brfss/acbs/2023/prevalence_tables/table2b_LLCP.html
/dpdx/diagnosticprocedures/stool/morphcomp.html
/hepatitis-a/outbreaks/person-to-person/index.html		 all 5 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 5 6 /mmwr/preview/mmwrhtml/00032099.htm
/mmwr/preview/mmwrhtml/00042966.htm
/mmwr/preview/mmwrhtml/00022071.htm		 all 5 pages (CSV)
Form field error is identified and described [sia-r75] n/a 3 43 /mmwr/preview/mmwrhtml/mm5915a3.htm
/mmwr/preview/mmwrhtml/mm5913a2.htm
/mmwr/preview/mmwrhtml/mm5946a4.htm		 all 3 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 3 3 /mmwr/volumes/65/wr/mm6535md.htm
/mmwr/volumes/65/wr/mm6523md.htm
/mmwr/volumes/65/wr/mm6516md.htm		 all 3 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 3 3 /art/php/surveillance-state-specific/index.html
/hepatitis-surveillance-2023/hepatitis-c/figure-3-7.html
/hepatitis-surveillance-2023/hepatitis-c/figure-3-1.html		 all 3 pages (CSV)
Scrollable element is keyboard accessible [sia-r80] n/a 2 41 /pcd/collections/Advancing_Health_Collection.htm
/pcd/collections/State_Local_Health_Departments.htm		 all 2 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 2 13 /stophivtogether/hiv-treatment/index.html
/ephtracking		 all 2 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 2 3 /mmwr/preview/mmwrhtml/ss4901a1.htm
/han/2023/han00487.html		 all 2 pages (CSV)
Element role is consistent with ARIA landmark [sia-r72] n/a 1 140 /pcd/es/2013_toc.htm all 1 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 1 19 /dpdx/diagnosticprocedures/stool/morphcomp.html all 1 pages (CSV)
sia-r76 n/a 1 7 /mmwr/preview/mmwrhtml/mm5815a3.htm all 1 pages (CSV)
aria-hidden element does not contain focusable elements [sia-r17] n/a 1 2 /ephtracking all 1 pages (CSV)
sia-r84 n/a 1 1 /hepatitis-surveillance-2021/about/technical-notes.html all 1 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 1 1 /mmwr/preview/mmwrhtml/mm6004a5.htm all 1 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 1 1 /ephtracking 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 (10731 raw engine findings → 10219 unique).

Unique issues (rule × page)
10219
Caught by both engines
507 highest confidence
axe only
4747
Alfa only
4965
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-W28, by pages affected.
IssuePagesRule references
Elements must only use permitted ARIA attributes448axe aria-prohibited-attr · Alfa sia-r18 · ACT 5c01ea
Images must have alternative text400axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute367axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Links must have discernible text119axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels100axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty13axe empty-heading · Alfa sia-r64 · ACT ffd0e9
Buttons must have discernible text6axe button-name · Alfa sia-r12 · ACT 97a4e1
Table cell headers attributes must refer to other <th> elements in the same table2axe td-headers-attr · Alfa sia-r45 · ACT a25f45