vital-scans open quality ledger

www.cdc.gov: Accessibility — week 2026-W37

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

Training priorities

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

SCCriterionPagesRulesNotes
1.4.3 Contrast (Minimum) 787 2
1.1.1 Non-text Content (images, icons) 731 2
3.1.1 Language of Page 720 2
2.5.5 WCAG 2.5.5 720 1
1.4.6 WCAG 1.4.6 624 1

Next 10 actions

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

Top 10 clustered component fixes for this week.
ClusterSeverityPagesWho it affectsHow to fixEvidenceDecision
<html> element must have a lang attribute · unattributed component
Fix one place, resolve ~589 finding(s) on 589 page(s).
XPath / selector: html
<html>
 Serious 589 Without vision, Limited cognitive, language, or learning ability Add a lang attribute to <html> (e.g. lang="en"). pages (CSV)
Form elements should have a visible label · unattributed component
Fix one place, resolve ~155 finding(s) on 155 page(s).
XPath / selector: .smallfield
<input class="smallfield" type="text" name="email" size="15" title="Insert e-mail" value="Insert e-mail" onfocus="this.value=''">
 Serious 155 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI pages (CSV)
Document should have one main landmark · unattributed component
Fix one place, resolve ~628 finding(s) on 628 page(s).
XPath / selector: html
<html>
 Moderate 628 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Document has a valid lang attribute · unattributed component
Fix one place, resolve ~131 finding(s) on 131 page(s).
XPath / selector: <html>
 Moderate 131 Without vision, Limited cognitive, language, or learning ability Add a valid lang attribute to <html>. pages (CSV)
Page should contain a level-one heading · unattributed component
Fix one place, resolve ~85 finding(s) on 85 page(s).
XPath / selector: html
<html lang="en-us" class="cdc-theme-cdc cdc-page-type--home" style="--mobile-header-offset: 0px;">
 Moderate 85 Requires manual testing. See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI pages (CSV)
Form elements must have labels · unattributed component
Fix one place, resolve ~114 finding(s) on 114 page(s).
XPath / selector: #searchBox
<input id="searchBox" class="searchBox" name="query" maxlength="256" type="text" style="width: 230px;">
 Critical 114 Without vision, Limited vision, Limited manipulation/strength Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) c · unattributed component
Fix one place, resolve ~931 finding(s) on 931 page(s).
XPath / selector: .page-right-rail__static
<aside class="page-right-rail__static noindex" role="complementary" style="margin-top: 47px;">
 Moderate 931 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)
Document should have one main landmark · unattributed component
Fix one place, resolve ~114 finding(s) on 114 page(s).
XPath / selector: #js
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" id="js">
 Moderate 114 Requires manual testing. Each page should have exactly one <main> landmark. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~409 finding(s) on 409 page(s).
XPath / selector: img[height="10"][alt=" "][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="1" height="10" alt=" " border="0">
 Critical 409 Without vision, Limited vision, Limited cognitive, language, or learning ability Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. pages (CSV)
Images must have alternative text · unattributed component
Fix one place, resolve ~806 finding(s) on 405 page(s).
XPath / selector: td[rowspan="2"][width="10"]:nth-child(1) > img[alt=" "][width="10"][src$="spacer.gif"]
<img src="../../images/spacer.gif" width="10" height="1" alt=" " border="0">
 Critical 405 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)

Bug reports

30 issue type(s) are shown by default out of 74 total. Prioritized by severity, key pages, WCAG level, and prevalence; use the toggle to show everything.

Overall severity mix: 4 critical, 16 serious, 49 moderate, 5 minor. By WCAG category: 31 WCAG 2.0 A, 4 WCAG 2.0 AA, 1 WCAG 2.1 A, 1 WCAG 2.2 AA, 4 WCAG 2.x AAA, 16 Best Practice, 17 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; 24 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.

Critical axe image-alt WCAG 2.0 A Images must have alternative text (WCAG 1.1.1) 596/3330 pages · 6794 instances Likely template
Bug ID
VS-271c9983
Pattern ID
VS-9074b4dd
Combined ID
VS-271c9983 (pattern VS-9074b4dd) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.1.1 Non-text Content (Level A, WCAG 2.0)
XPath / selector
img[height="8"][alt=" "][width="140"]
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

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

Description

Images must have alternative text. Detected by axe-core rule image-alt on 596 of 3330 scanned pages (6794 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.htm.
  2. Locate the element: img[height="8"][alt=" "][width="140"]
  3. Confirm the axe-core finding for rule image-alt against WCAG 1.1.1 Non-text Content.

Impact

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

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

Affected pages

…and more — all 596 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) 589/3330 pages · 589 instances Likely template
Bug ID
VS-437dcbca
Pattern ID
VS-c126b6a6
Combined ID
VS-437dcbca (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-W37 (14 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 589 of 3330 scanned pages (589 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.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 589 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 color-contrast WCAG 2.0 AA Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) 544/3330 pages · 879 instances Likely template
Bug ID
VS-d3ae4cb9
Pattern ID
VS-be8d563e
Combined ID
VS-d3ae4cb9 (pattern VS-be8d563e) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
1.4.3 Contrast (Minimum) (Level AA, WCAG 2.0)
XPath / selector
.wm-label
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

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

Description

Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 544 of 3330 scanned pages (879 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2013/13_0015.htm.
  2. Locate the element: .wm-label
  3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

Impact

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

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

Affected pages

…and more — all 544 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

Serious axe link-name WCAG 2.0 A Links must have discernible text (WCAG 2.4.4) 250/3330 pages · 969 instances Likely template
Bug ID
VS-83f5c05b
Pattern ID
VS-e9fe47ac
Combined ID
VS-83f5c05b (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-W37 (14 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 250 of 3330 scanned pages (969 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.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 250 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) 119/3330 pages · 121 instances Likely template
Bug ID
VS-d311d5c7
Pattern ID
VS-fafffee0
Combined ID
VS-d311d5c7 (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-W37 (14 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 119 of 3330 scanned pages (121 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/ss6307a1.htm?s_cid=ss6307a1_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 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: 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) 81/3330 pages · 87 instances Likely template
Bug ID
VS-ecb48d73
Pattern ID
VS-8ade3360
Combined ID
VS-ecb48d73 (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
p:nth-child(32) > .noDecoration[href$="mm6053.pdf"]
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<a href="/mmwr/pdf/wk/mm6053.pdf" class="noDecoration"><span class="tp-label">18</span>&nbsp;<span class="plugIns"><img src="/TemplatePackage/images/icon_pdf.gif" alt="Adobe PDF file" title="Adobe PDF

Description

Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 81 of 3330 scanned pages (87 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/ss6307a1.htm?s_cid=ss6307a1_w.
  2. Locate the element: p:nth-child(32) > .noDecoration[href$="mm6053.pdf"]
  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 81 pages (CSV).

Testing environment

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

Suggested fix

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

Serious axe list WCAG 2.0 A <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1) 38/3330 pages · 73 instances Likely template
Bug ID
VS-6a8190fe
Pattern ID
VS-a0bdbdf6
Combined ID
VS-6a8190fe (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:nth-child(56)
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<ol>

Description

<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 38 of 3330 scanned pages (73 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.htm.
  2. Locate the element: ol:nth-child(56)
  3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 38 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe scrollable-region-focusable WCAG 2.0 A Scrollable region must have keyboard access (WCAG 2.1.1) 34/3330 pages · 62 instances Likely template
Bug ID
VS-9f6a9ea6
Pattern ID
VS-c613c153
Combined ID
VS-9f6a9ea6 (pattern VS-c613c153) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.1.1 Keyboard (Level A, WCAG 2.0)
XPath / selector
.dfe-block.dfe-block--cdcmodule.cdc_page_element:nth-child(43) > .dfe-block__inner > .cdc-textblock > div
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

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

Description

Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 34 of 3330 scanned pages (62 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/surv-manual/php/table-of-contents/chapter-20-analysis-of-surveillance-data.html.
  2. Locate the element: .dfe-block.dfe-block--cdcmodule.cdc_page_element:nth-child(43) > .dfe-block__inner > .cdc-textblock > div
  3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

Impact

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

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

Affected pages

…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

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 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) 28/3330 pages · 45 instances Likely template
Bug ID
VS-c8637ed2
Pattern ID
VS-07ba3b17
Combined ID
VS-c8637ed2 (pattern VS-07ba3b17) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
1.3.1 Info and Relationships (Level A, WCAG 2.0)
XPath / selector
table
History
first seen 2026-W25, last seen 2026-W37 (13 wk)

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

<table align="center" border="1" cellpadding="7" cellspacing="0" class="opt-in table table-bordered">

Description

Table cell headers attributes must refer to other <th> elements in the same tabl. Detected by axe-core rule td-headers-attr on 28 of 3330 scanned pages (45 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table2.html.
  2. Locate the element: table
  3. Confirm the axe-core finding for rule td-headers-attr against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

…and more — all 28 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 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 frame-title WCAG 2.0 A Frames must have an accessible name (WCAG 4.1.2) 27/3330 pages · 68 instances Likely template
Bug ID
VS-b4820298
Pattern ID
VS-3f76c7ea
Combined ID
VS-b4820298 (pattern VS-3f76c7ea) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
div[data-yt-id="WuX1Jn7SoHw"] > iframe[allowfullscreen="allowfullscreen"][title=""]
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<iframe src="//www.youtube-nocookie.com/embed/WuX1Jn7SoHw?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.

Description

Frames must have an accessible name. Detected by axe-core rule frame-title on 27 of 3330 scanned pages (68 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/long-term-care-facilities/hcp/prevent-mdro/PPE.html.
  2. Locate the element: div[data-yt-id="WuX1Jn7SoHw"] > iframe[allowfullscreen="allowfullscreen"][title=""]
  3. Confirm the axe-core finding for rule frame-title against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

…and more — all 27 pages (CSV).

Testing environment

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

Suggested fix

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

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

Serious axe aria-command-name WCAG 2.0 A ARIA commands must have an accessible name (WCAG 4.1.2) 16/3330 pages · 225 instances Likely template
Bug ID
VS-f9ee407c
Pattern ID
VS-5c82bd60
Combined ID
VS-f9ee407c (pattern VS-5c82bd60) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
History
first seen 2026-W24, last seen 2026-W37 (14 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 16 of 3330 scanned pages (225 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/hepatitis-surveillance-2021/hepatitis-c/figure-3-7.html.
  2. Locate the element: th[aria-labelledby=":r3:-heading-0"] > .sort-icon[role="button"]
  3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe blink WCAG 2.0 A <blink> elements are deprecated and must not be used (WCAG 2.2.2) 14/3330 pages · 18 instances Likely template
Bug ID
VS-950d20de
Pattern ID
VS-4b45acfe
Combined ID
VS-950d20de (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-W37 (13 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 14 of 3330 scanned pages (18 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5605a5.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 listitem WCAG 2.0 A <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1) 5/3330 pages · 12 instances
Bug ID
VS-3c785eb7
Pattern ID
VS-6175596b
Combined ID
VS-3c785eb7 (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-col[role="cell"][data-col="2"] > li
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<li><strong>Goals of Partner Services<br></strong>Principles of PS. “The following principles serve as the foundation for providing partner services to persons with HIV infection or other STDs and the

Description

<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 5 of 3330 scanned pages (12 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/std-ips/php/about/tables.html.
  2. Locate the element: .table-col[role="cell"][data-col="2"] > li
  3. Confirm the axe-core finding for rule listitem against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe nested-interactive WCAG 2.0 A Interactive controls must not be nested (WCAG 4.1.2) 3/3330 pages · 3 instances
Bug ID
VS-3991421a
Pattern ID
VS-58301a87
Combined ID
VS-3991421a (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-W37 (14 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 3 of 3330 scanned pages (3 instances).

Steps to reproduce

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

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe select-name WCAG 2.0 A Select element must have an accessible name (WCAG 4.1.2) 2/3330 pages · 2 instances Likely content
Bug ID
VS-e02807b9
Pattern ID
VS-fab92378
Combined ID
VS-e02807b9 (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
select[data-tip=""]
History
first seen 2026-W25, last seen 2026-W37 (13 wk)

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

<select data-tip="" currentitem="false" style="max-width: 100%;">

Description

Select element must have an accessible name. Detected by axe-core rule select-name on 2 of 3330 scanned pages (2 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/drugoverdose/fatal/dashboard.
  2. Locate the element: select[data-tip=""]
  3. Confirm the axe-core finding for rule select-name against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Critical axe aria-allowed-attr WCAG 2.0 A Elements must only use supported ARIA attributes (WCAG 4.1.2) 1/3330 pages · 1 instances Likely content
Bug ID
VS-ccdd8c24
Pattern ID
VS-1467ea8a
Combined ID
VS-ccdd8c24 (pattern VS-1467ea8a) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
.fieldset--checkbox-group
History
first seen 2026-W25, last seen 2026-W37 (8 wk)

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

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

Description

Elements must only use supported ARIA attributes. Detected by axe-core rule aria-allowed-attr on 1 of 3330 scanned pages (1 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/nhsn/facadmin.
  2. Locate the element: .fieldset--checkbox-group
  3. Confirm the axe-core finding for rule aria-allowed-attr against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

How to fix: Remove ARIA attributes that aren't allowed on this role/element.

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

Serious axe valid-lang WCAG 2.0 AA lang attribute must have a valid value (WCAG 3.1.2) 1/3330 pages · 8 instances Likely content
Bug ID
VS-0eb181df
Pattern ID
VS-dd1c019f
Combined ID
VS-0eb181df (pattern VS-dd1c019f) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 AA
Obligation
required
Handling
review
WCAG SC
3.1.2 Language of Parts (Level AA, WCAG 2.0)
XPath / selector
div[data-post="814_67980"] > .list.dfe-curated-link__content > .dfe-curated-link__title > .cdc-block-link[lang="__"][target="_blank"]
History
first seen 2026-W24, last seen 2026-W37 (8 wk)

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

<a lang="__" class="cdc-block-link" href="/ncezid/media/files/KINANDE-QUESTIONNAIRE-1-05_13_2022.docx" target="_blank">

Description

lang attribute must have a valid value. Detected by axe-core rule valid-lang on 1 of 3330 scanned pages (8 instances).

Steps to reproduce

  1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/ncezid/resources/kap-guide.html.
  2. Locate the element: div[data-post="814_67980"] > .list.dfe-curated-link__content > .dfe-curated-link__title > .cdc-block-link[lang="__"][target="_blank"]
  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 document-title WCAG 2.0 A Documents must have <title> element to aid in navigation (WCAG 2.4.2) 1/3330 pages · 1 instances Likely content
Bug ID
VS-95634ceb
Pattern ID
VS-c80d5faa
Combined ID
VS-95634ceb (pattern VS-c80d5faa) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
2.4.2 Page Titled (Level A, WCAG 2.0)
XPath / selector
html
History
first seen 2026-W25, last seen 2026-W37 (9 wk)

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

<html>

Description

Documents must have <title> element to aid in navigation. Detected by axe-core rule document-title on 1 of 3330 scanned pages (1 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/nchs/updates/feature-1.html.
  2. Locate the element: html
  3. Confirm the axe-core finding for rule document-title against WCAG 2.4.2 Page Titled.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

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

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

Serious axe region Best Practice All page content should be contained by landmarks (WCAG criterion undetermined) 2924/3330 pages · 23738 instances Likely template
Bug ID
VS-65aa612b
Pattern ID
VS-f18df681
Combined ID
VS-65aa612b (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
table[cellpadding="0"][width="100%"]:nth-child(5) > tbody > tr:nth-child(2)
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<tr>

Description

All page content should be contained by landmarks. Detected by axe-core rule region on 2924 of 3330 scanned pages (23738 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.htm.
  2. Locate the element: table[cellpadding="0"][width="100%"]:nth-child(5) > tbody > tr:nth-child(2)
  3. Confirm the axe-core finding for rule region.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 2924 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) 155/3330 pages · 155 instances Likely template
Bug ID
VS-8aba0a0b
Pattern ID
VS-33841929
Combined ID
VS-8aba0a0b (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-W37 (14 wk)

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

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

Description

Form elements should have a visible label. Detected by axe-core rule label-title-only on 155 of 3330 scanned pages (155 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.htm.
  2. Locate the element: .smallfield
  3. Confirm the axe-core finding for rule label-title-only.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 155 pages (CSV).

Testing environment

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

Suggested fix

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

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) 252/3330 pages · 2384 instances Likely template
Bug ID
VS-94fb7c87
Pattern ID
VS-179ad9b3
Combined ID
VS-94fb7c87 (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-W37 (14 wk)

Description

Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 252 of 3330 scanned pages (2384 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001752.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 252 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) 243/3330 pages · 1401 instances Likely template
Bug ID
VS-25f1167e
Pattern ID
VS-f7e99f4b
Combined ID
VS-25f1167e (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-W37 (14 wk)

Description

Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 243 of 3330 scanned pages (1401 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  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 243 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) 135/3330 pages · 1532 instances Likely template
Bug ID
VS-4e0e051a
Pattern ID
VS-a24eaa8c
Combined ID
VS-4e0e051a (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-W37 (14 wk)

Description

Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 135 of 3330 scanned pages (1532 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001752.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 135 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) 131/3330 pages · 131 instances Likely template
Bug ID
VS-60de3974
Pattern ID
VS-7a0e5645
Combined ID
VS-60de3974 (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-W37 (14 wk)

Description

Document has a valid lang attribute. Detected by Siteimprove Alfa rule sia-r4 on 131 of 3330 scanned pages (131 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001752.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 131 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r14 WCAG 2.1 A Accessible name of link or button matches visible label (WCAG 2.5.3) 82/3330 pages · 141 instances Likely template
Bug ID
VS-a5f105cc
Pattern ID
VS-f7dba940
Combined ID
VS-a5f105cc (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="/rdc/" class="cdc-footer__super-title" aria-label="Research Data Center">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 82 of 3330 scanned pages (141 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  2. Locate the element: <a href="/rdc/" class="cdc-footer__super-title" aria-label="Research Data Center">
  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 82 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r68 WCAG 2.0 A Presentational children of an element are not focusable (WCAG 1.3.1) 77/3330 pages · 803 instances Likely template
Bug ID
VS-0117df1a
Pattern ID
VS-d6097011
Combined ID
VS-0117df1a (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-W37 (14 wk)

Description

Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 77 of 3330 scanned pages (803 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  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 77 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r11 WCAG 2.0 A Link has accessible name (WCAG 2.4.4) 58/3330 pages · 316 instances Likely template
Bug ID
VS-76da46c2
Pattern ID
VS-28ebd979
Combined ID
VS-76da46c2 (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="reference.html#" target="_blank">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 58 of 3330 scanned pages (316 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh-rtecs/WY280DE8.html.
  2. Locate the element: <a href="reference.html#" target="_blank">
  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 58 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate alfa sia-r8 WCAG 2.0 A Form field has accessible name (WCAG 4.1.2) 33/3330 pages · 85 instances Likely template
Bug ID
VS-97bc05f3
Pattern ID
VS-a48e6078
Combined ID
VS-97bc05f3 (pattern VS-a48e6078) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.0 A
Obligation
required
Handling
review
WCAG SC
4.1.2 Name, Role, Value (Level A, WCAG 2.0)
XPath / selector
<input id="searchBox" class="searchBox" name="query" maxlength="256">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 33 of 3330 scanned pages (85 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6023a5.htm?s_cid=mm6023a5_w.
  2. Locate the element: <input id="searchBox" class="searchBox" name="query" maxlength="256">
  3. Confirm the Siteimprove Alfa finding for rule sia-r8 against WCAG 4.1.2 Name, Role, Value.

Impact

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

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

Affected pages

…and more — all 33 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-r46 WCAG 2.0 A Element has required aria-owns (WCAG 1.3.1) 16/3330 pages · 299 instances Likely template
Bug ID
VS-44c68502
Pattern ID
VS-4408605e
Combined ID
VS-44c68502 (pattern VS-4408605e) — 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
<th align="left" id="row1 " scope="row">
History
first seen 2026-W25, last seen 2026-W37 (13 wk)

Description

Element has required aria-owns. Detected by Siteimprove Alfa rule sia-r46 on 16 of 3330 scanned pages (299 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table2.html.
  2. Locate the element: <th align="left" id="row1 " scope="row">
  3. Confirm the Siteimprove Alfa finding for rule sia-r46 against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r46

Moderate alfa sia-r45 WCAG 2.0 A aria-hidden element is not exposed to assistive technology (WCAG 1.3.1) 10/3330 pages · 1989 instances · possible duplicate Likely template
Bug ID
VS-4e39544f
Pattern ID
VS-9207ed51
Combined ID
VS-4e39544f (pattern VS-9207ed51) — 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
@headers="FormerSampSize row26 "
History
first seen 2026-W25, last seen 2026-W37 (12 wk)
Possible duplicate
Same WCAG SC covered by axe report VS-3c785eb7 (pattern VS-6175596b). If axe and this engine flag the same element, the axe report takes precedence — mark this as duplicate in JIRA.

Description

aria-hidden element is not exposed to assistive technology. Detected by Siteimprove Alfa rule sia-r45 on 10 of 3330 scanned pages (1989 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/brfss/acbs/2012/prevalence_tables/table2.html.
  2. Locate the element: @headers="FormerSampSize row26 "
  3. Confirm the Siteimprove Alfa finding for rule sia-r45 against WCAG 1.3.1 Info and Relationships.

Impact

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

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

Affected pages

Testing environment

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

Suggested fix

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r45

Moderate axe landmark-unique Best Practice Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) 937/3330 pages · 959 instances Likely template
Bug ID
VS-1ad2a872
Pattern ID
VS-8806389c
Combined ID
VS-1ad2a872 (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-W37 (14 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 937 of 3330 scanned pages (959 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  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 937 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 heading-order Best Practice Heading levels should only increase by one (WCAG criterion undetermined) 887/3330 pages · 1228 instances Likely template
Bug ID
VS-71c0a287
Pattern ID
VS-d25f622d
Combined ID
VS-71c0a287 (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
h4
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<h4>Paula M. Lantz, PhD; Andrew Pritchard, MPH</h4>

Description

Heading levels should only increase by one. Detected by axe-core rule heading-order on 887 of 3330 scanned pages (1228 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.htm.
  2. Locate the element: h4
  3. Confirm the axe-core finding for rule heading-order.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 887 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate axe landmark-one-main Best Practice Document should have one main landmark (WCAG criterion undetermined) 743/3330 pages · 743 instances Likely template
Bug ID
VS-ab604fce
Pattern ID
VS-d5d82446
Combined ID
VS-ab604fce (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-W37 (14 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 743 of 3330 scanned pages (743 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/pcd/issues/2010/jul/09_0246.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 743 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-r111 WCAG 2.x AAA Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) 720/3330 pages · 22614 instances Likely template
Bug ID
VS-757008d3
Pattern ID
VS-cb53cc4d
Combined ID
VS-757008d3 (pattern VS-cb53cc4d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
2.5.5 Target Size (Enhanced) (Level AAA, WCAG 2.1)
XPath / selector
<button class="btn btn-outline-white btn-arrow-down btn-fancy" id="megaButton">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 720 of 3330 scanned pages (22614 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 720 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) 624/3330 pages · 20869 instances Likely template
Bug ID
VS-f8aaaff0
Pattern ID
VS-646b1e0b
Combined ID
VS-f8aaaff0 (pattern VS-646b1e0b) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.6 Contrast (Enhanced) (Level AAA, WCAG 2.0)
XPath / selector
text: " Here's how you know "
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 624 of 3330 scanned pages (20869 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  2. Locate the element: text: " Here's how you know "
  3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 624 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) 553/3330 pages · 8306 instances Likely template
Bug ID
VS-c5338190
Pattern ID
VS-c18be945
Combined ID
VS-c5338190 (pattern VS-c18be945) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
text: "Skip directly to search"
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 553 of 3330 scanned pages (8306 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  2. Locate the element: text: "Skip directly to search"
  3. Confirm the Siteimprove Alfa finding for rule sia-r57.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 553 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate alfa sia-r18 Undetermined aria attribute is permitted for element role (WCAG criterion undetermined) 378/3330 pages · 389 instances Likely template
Bug ID
VS-c5c67d47
Pattern ID
VS-e05344b9
Combined ID
VS-c5c67d47 (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-W37 (14 wk)

Description

aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 378 of 3330 scanned pages (389 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/rdc.
  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 378 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) 252/3330 pages · 1785 instances Likely template
Bug ID
VS-e4f2c427
Pattern ID
VS-fbf54eba
Combined ID
VS-e4f2c427 (pattern VS-fbf54eba) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
WCAG 2.x AAA
Obligation
aspirational
Handling
review
WCAG SC
1.4.8 Visual Presentation (Level AAA, WCAG 2.0)
XPath / selector
<p class="cdc-footer__super-desc">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 252 of 3330 scanned pages (1785 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/nchs/nhis/2019_quest_redesign.htm.
  2. Locate the element: <p class="cdc-footer__super-desc">
  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 252 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) 216/3330 pages · 303 instances Likely template
Bug ID
VS-c08a5856
Pattern ID
VS-f054f4a4
Combined ID
VS-c08a5856 (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 class="h3">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 216 of 3330 scanned pages (303 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/volumes/70/ss/ss7008a1_appendix.htm.
  2. Locate the element: <h3 class="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 216 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) 210/3330 pages · 54061 instances Likely template
Bug ID
VS-2a1fd731
Pattern ID
VS-2208081b
Combined ID
VS-2a1fd731 (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-W37 (14 wk)

Description

Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 210 of 3330 scanned pages (54061 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001752.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 210 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) 152/3330 pages · 152 instances Likely template
Bug ID
VS-4b59307b
Pattern ID
VS-3d033717
Combined ID
VS-4b59307b (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-W37 (14 wk)

Description

No obsolete or deprecated elements are used. Detected by Siteimprove Alfa rule sia-r70 on 152 of 3330 scanned pages (152 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00001752.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 152 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

Minor axe aria-allowed-role Best Practice ARIA role should be appropriate for the element (WCAG criterion undetermined) 139/3330 pages · 159 instances Likely template
Bug ID
VS-7f813bfa
Pattern ID
VS-4fac2f41
Combined ID
VS-7f813bfa (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-W37 (14 wk)

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

<img src="/niosh/media/images/2026/03/2008-100-thumb.png" alt="Technology News 528 - Recirculation Filter Is Key to Improving Dust Control in Enclosed Cabs" role="presentation">

Description

ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 139 of 3330 scanned pages (159 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/docs/mining/works/coversheet502.html.
  2. Locate the element: img[role="presentation"]
  3. Confirm the axe-core finding for rule aria-allowed-role.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 139 pages (CSV).

Testing environment

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

Suggested fix

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

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

Moderate deprecated-html presentational-attr Undetermined Presentational attribute (use CSS) (WCAG criterion undetermined) 87/3330 pages · 14453 instances Likely template
Bug ID
VS-1076cf2f
Pattern ID
VS-04a9d28c
Combined ID
VS-1076cf2f (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-W37 (14 wk)

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

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

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

Description

Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 87 of 3330 scanned pages (14453 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/pcd/issues/2007/oct/06_0051.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 87 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 axe page-has-heading-one Best Practice Page should contain a level-one heading (WCAG criterion undetermined) 85/3330 pages · 85 instances Likely template
Bug ID
VS-1f919e6e
Pattern ID
VS-fa44f293
Combined ID
VS-1f919e6e (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-W37 (14 wk)

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

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

Description

Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 85 of 3330 scanned pages (85 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 85 pages (CSV).

Testing environment

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

Suggested fix

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

Moderate deprecated-html font-element Undetermined Obsolete <font> element (use CSS) (WCAG criterion undetermined) 52/3330 pages · 380 instances Likely template
Bug ID
VS-f1e84737
Pattern ID
VS-91d2294a
Combined ID
VS-f1e84737 (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-W37 (14 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 52 of 3330 scanned pages (380 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5444a4.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 52 pages (CSV).

Testing environment

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

Suggested fix

Not captured by automated scan — requires manual testing.

Moderate alfa sia-r61 Undetermined Form field label is visible (WCAG criterion undetermined) 51/3330 pages · 51 instances Likely template
Bug ID
VS-bd7467a8
Pattern ID
VS-7118fead
Combined ID
VS-bd7467a8 (pattern VS-7118fead) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Undetermined
Obligation
unmapped
Handling
review
WCAG SC
undetermined
XPath / selector
{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 51 of 3330 scanned pages (51 instances).

Steps to reproduce

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

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 51 pages (CSV).

Testing environment

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

Suggested fix

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

Minor axe empty-table-header Best Practice Table header text should not be empty (WCAG criterion undetermined) 45/3330 pages · 148 instances Likely template
Bug ID
VS-42e1cef4
Pattern ID
VS-d69fc059
Combined ID
VS-42e1cef4 (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
.text-center:nth-child(1)
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<th class="text-center"></th>

Description

Table header text should not be empty. Detected by axe-core rule empty-table-header on 45 of 3330 scanned pages (148 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/flu/weekly/weeklyarchives2024-2025/data/iliage18.html.
  2. Locate the element: .text-center:nth-child(1)
  3. Confirm the axe-core finding for rule empty-table-header.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 45 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 alfa sia-r78 Undetermined Table header has scope (WCAG criterion undetermined) 42/3330 pages · 64 instances Likely template
Bug ID
VS-631de034
Pattern ID
VS-2cd767ca
Combined ID
VS-631de034 (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
<h2 id="find-information" class="cdc-dfe-sitemap__panes-header">
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

Description

Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 42 of 3330 scanned pages (64 instances).

Steps to reproduce

  1. Open http://www.cdc.gov/niosh/bulletin/site.html.
  2. Locate the element: <h2 id="find-information" class="cdc-dfe-sitemap__panes-header">
  3. Confirm the Siteimprove Alfa finding for rule sia-r78.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 42 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 big-element Undetermined Obsolete <big> element (use CSS) (WCAG criterion undetermined) 40/3330 pages · 59 instances Likely template
Bug ID
VS-ecd70676
Pattern ID
VS-7845739d
Combined ID
VS-ecd70676 (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-W37 (14 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 40 of 3330 scanned pages (59 instances).

Steps to reproduce

  1. Open https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5444a4.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

…and more — all 40 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-heading Best Practice Headings should not be empty (WCAG criterion undetermined) 29/3330 pages · 35 instances Likely template
Bug ID
VS-e7af1264
Pattern ID
VS-0066c67d
Combined ID
VS-e7af1264 (pattern VS-0066c67d) — use this format in JIRA/spreadsheets to filter by instance or pattern
WCAG category
Best Practice
Obligation
advisory
Handling
review
WCAG SC
Best Practice — not a WCAG requirement
XPath / selector
#\32 026_total_cases
History
first seen 2026-W24, last seen 2026-W37 (14 wk)

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

<h5 id="2026_total_cases" style="font-weight: bold;"></h5>

Description

Headings should not be empty. Detected by axe-core rule empty-heading on 29 of 3330 scanned pages (35 instances).

Steps to reproduce

  1. Open https://%5C%5C%5C%5Ccdc.gov%5C%5Cproject%5C%5COPHSS_CSELS_DPHID_MMWR_OD_Editors%5C%5CMMWR-WE%5C%5Cxxx%20-%20AUGUST%2021%5C%5CRoundtable%5C%5Cvqf8@cdc.gov/measles/es/data-research/index.html.
  2. Locate the element: #\32 026_total_cases
  3. Confirm the axe-core finding for rule empty-heading.

Impact

Not captured by automated scan — requires manual testing.

Affected pages

…and more — all 29 pages (CSV).

Testing environment

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

Suggested fix

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

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

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

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

SeverityFindingWCAG categoryPages
Moderate Obsolete <center> element (use CSS) (WCAG criterion undetermined) [center-element] Undetermined 19
Moderate scope attribute should be used correctly (WCAG criterion undetermined) [scope-attr-valid] Best Practice 15
Moderate The skip-link target should exist and be focusable (WCAG criterion undetermined) [skip-link] Best Practice 11
Moderate Tables are used for tabular data, not layout (WCAG criterion undetermined) [sia-r40] Undetermined 9
Moderate Duplicate role landmark is labeled (WCAG criterion undetermined) [sia-r79] Undetermined 6
Moderate Input purpose can be determined (WCAG criterion undetermined) [sia-r60] Undetermined 6
Moderate Table cell has header (WCAG 1.3.1) [sia-r77] WCAG 2.0 A 5
Moderate Button has accessible name (WCAG 4.1.2) [sia-r12] WCAG 2.0 A 4
Moderate Element has required owned roles (WCAG 1.3.1) [sia-r64] WCAG 2.0 A 4
Moderate Assertive live region is marked as atomic (WCAG criterion undetermined) [sia-r54] Undetermined 4
Moderate Contentinfo landmark should not be contained in another landmark (WCAG criterion undetermined) [landmark-contentinfo-is-top-level] Best Practice 3
Moderate Document should not have more than one banner landmark (WCAG criterion undetermined) [landmark-no-duplicate-banner] Best Practice 3
Moderate Document should not have more than one contentinfo landmark (WCAG criterion undetermined) [landmark-no-duplicate-contentinfo] Best Practice 3
Moderate First focusable element is link to main content (WCAG criterion undetermined) [sia-r87] Undetermined 3
Moderate Info and Relationships (WCAG 1.3.1) [sia-r76] WCAG 2.0 A 3
Minor Alternative text of images should not be repeated as text (WCAG criterion undetermined) [image-redundant-alt] Best Practice 3
Moderate Element with orientation is not locked (WCAG criterion undetermined) [sia-r59] Undetermined 2
Minor Tables should not have the same summary and caption (WCAG criterion undetermined) [table-duplicate-name] Best Practice 2
Moderate Element with lang attribute has correct language (WCAG 3.1.2) [sia-r7] WCAG 2.0 AA 1
Moderate Link in text block is visually distinguishable without color (WCAG 1.4.1) [sia-r62] WCAG 2.0 A 1
Moderate aria-hidden element does not contain focusable elements (WCAG 4.1.2) [sia-r17] WCAG 2.0 A 1
Moderate Component with same name serves same purpose (WCAG 4.1.2) [sia-r90] WCAG 2.0 A 1
Moderate Document has a title element (WCAG 2.4.2) [sia-r1] WCAG 2.0 A 1
Moderate Keyboard trap does not exist (WCAG criterion undetermined) [sia-r85] Undetermined 1

Deque axe-core findings

Rule-level axe-core summary (34 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-W37, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
All page content should be contained by landmarks [region] moderate 2924 23738 /pcd/issues/2010/jul/09_0246.htm
/rdc
/parasites/hcp/clinical-overview/index.html		 all 2924 pages (CSV)
Landmarks should have a unique role or role/label/title (i.e. accessible name) combination [landmark-unique] moderate 937 959 /rdc
/parasites/hcp/clinical-overview/index.html
/nchs/nhis/2019_quest_redesign.htm		 all 937 pages (CSV)
Heading levels should only increase by one [heading-order] moderate 887 1228 /pcd/issues/2010/jul/09_0246.htm
/pcd/issues/2013/13_0015.htm
/mmwr/preview/mmwrhtml/00026182.htm		 all 887 pages (CSV)
Document should have one main landmark [landmark-one-main] moderate 743 743 /pcd/issues/2010/jul/09_0246.htm
/pcd/issues/2013/13_0015.htm
/mmwr/preview/mmwrhtml/00026182.htm		 all 743 pages (CSV)
Images must have alternative text [image-alt] critical 596 6794 /pcd/issues/2010/jul/09_0246.htm
/mmwr/preview/mmwrhtml/00026182.htm
/mmwr/preview/mmwrhtml/00015030.htm		 all 596 pages (CSV)
<html> element must have a lang attribute [html-has-lang] serious 589 589 /pcd/issues/2010/jul/09_0246.htm
/mmwr/preview/mmwrhtml/00026182.htm
/mmwr/preview/mmwrhtml/00015030.htm		 all 589 pages (CSV)
Elements must meet minimum color contrast ratio thresholds [color-contrast] serious 544 879 /pcd/issues/2013/13_0015.htm
/mmwr/preview/mmwrhtml/00026182.htm
/mmwr/preview/mmwrhtml/00015030.htm		 all 544 pages (CSV)
Links must have discernible text [link-name] serious 250 969 /pcd/issues/2010/jul/09_0246.htm
/pcd/issues/2005/jan/04_0105.htm
/mmwr/preview/mmwrhtml/mm5605a5.htm		 all 250 pages (CSV)
Form elements should have a visible label [label-title-only] serious 155 155 /pcd/issues/2010/jul/09_0246.htm
/pcd/issues/2005/jan/04_0105.htm
/pcd/issues/2007/oct/06_0051.htm		 all 155 pages (CSV)
ARIA role should be appropriate for the element [aria-allowed-role] minor 139 159 /niosh/docs/mining/works/coversheet502.html
/niosh/publications/numbered/2011-155.html
/c-diff/resources/antibiotic-risk-factor.html		 all 139 pages (CSV)
Form elements must have labels [label] critical 119 121 /mmwr/preview/mmwrhtml/ss6307a1.htm
/mmwr/preview/mmwrhtml/mm6340a12.htm
/mmwr/preview/mmwrhtml/rr6105a1.htm		 all 119 pages (CSV)
Page should contain a level-one heading [page-has-heading-one] moderate 85 85 /comec/index.html
/flu/weekly/weeklyarchives2024-2025/data/iliage18.html
/mmwr/volumes/66/wr/mm6607md.htm		 all 85 pages (CSV)
Links must be distinguishable without relying on color [link-in-text-block] serious 81 87 /mmwr/preview/mmwrhtml/ss6307a1.htm
/hepatitis-surveillance-2023/appendix/table-5-4.html
/health-literacy/php/older-adults/simple-steps.html		 all 81 pages (CSV)
Table header text should not be empty [empty-table-header] minor 45 148 /flu/weekly/weeklyarchives2024-2025/data/iliage18.html
/measles/es/data-research/index.html
/mmwr/volumes/70/rr/rr7004a1.htm		 all 45 pages (CSV)
<ul> and <ol> must only directly contain <li>, <script> or <template> elements [list] serious 38 73 /pcd/issues/2010/jul/09_0246.htm
/mmwr/preview/mmwrhtml/00015030.htm
/mmwr/preview/mmwrhtml/00017377.htm		 all 38 pages (CSV)
Scrollable region must have keyboard access [scrollable-region-focusable] serious 34 62 /surv-manual/php/table-of-contents/chapter-20-analysis-of-surveillance-data.html
/hepatitis/statistics/2021surveillance/hepatitis-c/table-3.1.htm
/iis/code-sets/fall-season-respiratory-codes.html		 all 34 pages (CSV)
Headings should not be empty [empty-heading] minor 29 35 /measles/es/data-research/index.html
/mmwr/preview/mmwrhtml/mm5238a2.htm
/mmwr/preview/mmwrhtml/mm5541a4.htm		 all 29 pages (CSV)
Table cell headers attributes must refer to other <th> elements in the same table [td-headers-attr] serious 28 45 /brfss/acbs/2012/prevalence_tables/table2.html
/vaccines/schedules/hcp/imz/adult-conditions.html
/brfss/acbs/2010/prevalence_tables/table5a.html		 all 28 pages (CSV)
Frames must have an accessible name [frame-title] serious 27 68 /long-term-care-facilities/hcp/prevent-mdro/PPE.html
/lab-training/php/virtual-reality/index.html
/diabetes-prevention/employers-insurers/impact-toolkit-help.html		 all 27 pages (CSV)
ARIA commands must have an accessible name [aria-command-name] serious 16 225 /hepatitis-surveillance-2021/hepatitis-c/figure-3-7.html
/hepatitis-surveillance-2022/hepatitis-b/figure-2-7.html
/hepatitis/php/npr-2025/hep-c-reduce-infections.html		 all 16 pages (CSV)
scope attribute should be used correctly [scope-attr-valid] moderate 15 228 /mmwr/volumes/70/rr/rr7004a1.htm
/iis/code-sets/fall-season-respiratory-codes.html
/fluview/surveillance/2026-week-05.html		 all 15 pages (CSV)
<blink> elements are deprecated and must not be used [blink] serious 14 18 /mmwr/preview/mmwrhtml/mm5605a5.htm
/mmwr/preview/mmwrhtml/mm4843a2.htm
/mmwr/preview/mmwrhtml/mm5645a6.htm		 all 14 pages (CSV)
The skip-link target should exist and be focusable [skip-link] moderate 11 11 /nhsn/covid19/transition.html
/pcd/issues/2013/12_0084_es.htm
/pcd/issues/2012/10_0254_es.htm		 all 11 pages (CSV)
<li> elements must be contained in a <ul> or <ol> [listitem] serious 5 12 /std-ips/php/about/tables.html
/foodborne-outbreaks/php/data-research/summary-2017-2020.html
/std-ips/php/glossary/appendix-i.html		 all 5 pages (CSV)
Alternative text of images should not be repeated as text [image-redundant-alt] minor 3 10 /tb/statistics/reports/2022/default.htm
/injury/wisqars/fatal/index.html
/mmwr/preview/mmwrhtml/ss5210a1.htm		 all 3 pages (CSV)
Interactive controls must not be nested [nested-interactive] serious 3 3 /tobacco/campaign/tips/spanish/poblaciones/audiencia-general.html
/tobacco/campaign/tips/diseases/copd.html
/tobacco/campaign/tips/groups/military.html		 all 3 pages (CSV)
Contentinfo landmark should not be contained in another landmark [landmark-contentinfo-is-top-level] moderate 3 3 /howrightnow/espanol/recursos/sobrellevando-el-estres
/howrightnow/espanol/index.html
/howrightnow/espanol/recursos/sobrellevando-el-estres/index.html		 all 3 pages (CSV)
Document should not have more than one banner landmark [landmark-no-duplicate-banner] moderate 3 3 /howrightnow/espanol/recursos/sobrellevando-el-estres
/howrightnow/espanol/index.html
/howrightnow/espanol/recursos/sobrellevando-el-estres/index.html		 all 3 pages (CSV)
Document should not have more than one contentinfo landmark [landmark-no-duplicate-contentinfo] moderate 3 3 /howrightnow/espanol/recursos/sobrellevando-el-estres
/howrightnow/espanol/index.html
/howrightnow/espanol/recursos/sobrellevando-el-estres/index.html		 all 3 pages (CSV)
Tables should not have the same summary and caption [table-duplicate-name] minor 2 4 /nssp/php/onboarding-resources/implementation-guides.html
/flu/professionals/antivirals/summary-clinicians.htm		 all 2 pages (CSV)
Select element must have an accessible name [select-name] critical 2 2 /drugoverdose/fatal/dashboard
/tobacco/campaign/tips/spanish/dejar-fumar/medicamentos/como-usar-medicamentos/tabletas-de-nicotina.html		 all 2 pages (CSV)
lang attribute must have a valid value [valid-lang] serious 1 8 /ncezid/resources/kap-guide.html all 1 pages (CSV)
Elements must only use supported ARIA attributes [aria-allowed-attr] critical 1 1 /nhsn/facadmin all 1 pages (CSV)
Documents must have <title> element to aid in navigation [document-title] serious 1 1 /nchs/updates/feature-1.html all 1 pages (CSV)

Siteimprove Alfa findings

Rule-level Alfa summary (36 rule type(s))

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

Alfa rules failing in 2026-W37, by pages affected
RuleImpactPages affectedInstancesExample pagesAll affected
Target size is at least 44×44 CSS pixels (Enhanced) [sia-r111] n/a 720 22614 /rdc
/nchs/nhis/2019_quest_redesign.htm
/diabetes/healthy-eating/spotting-hidden-sugars-in-everyday-foods.html		 all 720 pages (CSV)
Text has enhanced contrast [sia-r66] n/a 624 20869 /rdc
/nchs/nhis/2019_quest_redesign.htm
/diabetes/healthy-eating/spotting-hidden-sugars-in-everyday-foods.html		 all 624 pages (CSV)
Scrolling content can be accessed by keyboard [sia-r57] n/a 553 8306 /rdc
/nchs/nhis/2019_quest_redesign.htm
/diabetes/healthy-eating/spotting-hidden-sugars-in-everyday-foods.html		 all 553 pages (CSV)
aria attribute is permitted for element role [sia-r18] n/a 378 389 /rdc
/nchs/nhis/2019_quest_redesign.htm
/diabetes/healthy-eating/spotting-hidden-sugars-in-everyday-foods.html		 all 378 pages (CSV)
Target size is at least 24×24 CSS pixels or has spacing (Minimum) [sia-r113] n/a 252 2384 /mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm
/mmwr/preview/mmwrhtml/mm5026md.htm		 all 252 pages (CSV)
Link is distinguishable without relying on color [sia-r74] n/a 252 1785 /nchs/nhis/2019_quest_redesign.htm
/niosh/bulletin/site.html
/mmwr/preview/mmwrhtml/00001752.htm		 all 252 pages (CSV)
Text has sufficient color contrast (Enhanced) [sia-r69] n/a 243 1401 /rdc
/nchs/nhis/2019_quest_redesign.htm
/diabetes/healthy-eating/spotting-hidden-sugars-in-everyday-foods.html		 all 243 pages (CSV)
Headings are structured hierarchically [sia-r53] n/a 216 303 /mmwr/volumes/70/ss/ss7008a1_appendix.htm
/mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm		 all 216 pages (CSV)
Text has minimum contrast ratio of 4.5:1 [sia-r73] n/a 210 54061 /mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm
/mmwr/preview/mmwrhtml/mm5026md.htm		 all 210 pages (CSV)
No obsolete or deprecated elements are used [sia-r70] n/a 152 152 /mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm
/mmwr/preview/mmwrhtml/mm5026md.htm		 all 152 pages (CSV)
Image has accessible name [sia-r2] n/a 135 1532 /mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm
/mmwr/preview/mmwrhtml/mm5026md.htm		 all 135 pages (CSV)
Document has a valid lang attribute [sia-r4] n/a 131 131 /mmwr/preview/mmwrhtml/00001752.htm
/mmwr/preview/mmwrhtml/rr5215a2.htm
/mmwr/preview/mmwrhtml/mm5026md.htm		 all 131 pages (CSV)
Accessible name of link or button matches visible label [sia-r14] n/a 82 141 /rdc
/clinical-standardization-programs/php/cvd/index.html
/hepatitis-surveillance-2023/appendix/table-5-4.html		 all 82 pages (CSV)
Presentational children of an element are not focusable [sia-r68] n/a 77 803 /rdc
/hepatitis-surveillance-2023/appendix/table-5-4.html
/cancer/health-equity/what-cdc-is-doing.html		 all 77 pages (CSV)
Link has accessible name [sia-r11] n/a 58 316 /niosh-rtecs/WY280DE8.html
/pcd/issues/2010/may/09_0130_es.htm
/pcd/issues/2006/oct/05_0009_fr.htm		 all 58 pages (CSV)
Form field label is visible [sia-r61] n/a 51 51 /narms/site.html
/mmwr/preview/mmwrhtml/mm6023a5.htm
/set-net/index.html		 all 51 pages (CSV)
Table header has scope [sia-r78] n/a 42 64 /niosh/bulletin/site.html
/measles/es/data-research/index.html
/acip/evidence-to-recommendations/JYNNEOS-orthopoxvirus-primary-hcp-etr.html		 all 42 pages (CSV)
Form field has accessible name [sia-r8] n/a 33 85 /mmwr/preview/mmwrhtml/mm6023a5.htm
/act-early/digital-online-checklist/6-months.html
/mmwr/preview/mmwrhtml/mm6203a3.htm		 all 33 pages (CSV)
Element has required aria-owns [sia-r46] n/a 16 299 /brfss/acbs/2012/prevalence_tables/table2.html
/hepatitis-surveillance-2023/appendix/table-5-4.html
/nssp/php/onboarding-resources/companion-guide-ed-data-respiratory-illness.html		 all 16 pages (CSV)
aria-hidden element is not exposed to assistive technology [sia-r45] n/a 10 1989 /brfss/acbs/2012/prevalence_tables/table2.html
/nssp/php/onboarding-resources/companion-guide-ed-data-respiratory-illness.html
/brfss/acbs/2023/prevalence_tables/table3_LLCP.html		 all 10 pages (CSV)
Tables are used for tabular data, not layout [sia-r40] n/a 9 11 /hepatitis/statistics/2020surveillance/hepatitis-b/figure-2.3.htm
/measles/es/data-research/index.html
/mental-health/about-data/community-connection.html		 all 9 pages (CSV)
Duplicate role landmark is labeled [sia-r79] n/a 6 17 /mmwr/preview/mmwrhtml/00045941.htm
/mmwr/preview/mmwrhtml/00038177.htm
/mmwr/preview/mmwrhtml/00056161.htm		 all 6 pages (CSV)
Input purpose can be determined [sia-r60] n/a 6 9 /ncird/press-form/index.html
/mental-health/about-data/community-connection.html
/mmwr/indrr_2001.html		 all 6 pages (CSV)
Table cell has header [sia-r77] n/a 5 3131 /measles/es/data-research/index.html
/mmwr/preview/mmwrhtml/mm6012md.htm
/asthma/healthcare-use/2018/table_b.html		 all 5 pages (CSV)
Button has accessible name [sia-r12] n/a 4 42 /hepatitis/php/npr-2025/hep-c-reduce-infections.html
/hepatitis/php/npr-2025/hep-c-reduce-deaths.html
/nchs/nvss/facility-worksheets-guide/15.htm		 all 4 pages (CSV)
Element has required owned roles [sia-r64] n/a 4 9 /measles/es/data-research/index.html
/nchs/products/databriefs/db170.htm
/mmwr/preview/mmwrhtml/mm5445a2.htm		 all 4 pages (CSV)
Assertive live region is marked as atomic [sia-r54] n/a 4 5 /hepatitis/php/npr-2025/hep-c-reduce-infections.html
/hepatitis/php/npr-2025/hep-c-reduce-deaths.html
/nhsn/fhirportal/dqm/ach-dQMs.html		 all 4 pages (CSV)
sia-r76 n/a 3 3 /nssp/php/onboarding-resources/companion-guide-ed-data-respiratory-illness.html
/legionella/php/surveillance/surveillance-report-2020-2021.html
/vaccines/pubs/surv-manual/chpt08-mening.html		 all 3 pages (CSV)
First focusable element is link to main content [sia-r87] n/a 3 3 /howrightnow/espanol/emocion/soledad/index.html
/wtc/newsyouthcohortupdate_20240206.html
/nchs/updates/feature-1.html		 all 3 pages (CSV)
Element with orientation is not locked [sia-r59] n/a 2 2 /mmwr/volumes/65/wr/mm6547md.htm
/nchs/updates/feature-1.html		 all 2 pages (CSV)
Element with lang attribute has correct language [sia-r7] n/a 1 8 /ncezid/resources/kap-guide.html all 1 pages (CSV)
Link in text block is visually distinguishable without color [sia-r62] n/a 1 2 /ccindex/everydaywords/index.html all 1 pages (CSV)
Component with same name serves same purpose [sia-r90] n/a 1 1 /measles/es/data-research/index.html all 1 pages (CSV)
aria-hidden element does not contain focusable elements [sia-r17] n/a 1 1 /howrightnow/espanol/emocion/soledad/index.html all 1 pages (CSV)
Keyboard trap does not exist [sia-r85] n/a 1 1 /ncbddd/watchmetraining/module1.html all 1 pages (CSV)
Document has a title element [sia-r1] n/a 1 1 /nchs/updates/feature-1.html all 1 pages (CSV)

Unique accessibility issues (axe + Alfa consolidated)

axe and Alfa both implement W3C ACT rules, so the same issue is often caught by both. These are deduplicated by ACT rule and page, so a shared finding counts once (12620 raw engine findings → 12247 unique).

Unique issues (rule × page)
12247
Caught by both engines
373 highest confidence
axe only
7960
Alfa only
3914
10 rule type(s) caught by both engines — highest confidence

Two independent ACT-rule implementations (Deque axe-core and Siteimprove Alfa) flagged the same issue on the same pages. Agreement between separate engines is strong evidence the barrier is real, not a single-tool false positive — the best place to start.

Rules flagged by both axe-core and Alfa in 2026-W37, by pages affected.
IssuePagesRule references
Images must have alternative text596axe image-alt · Alfa sia-r2 · ACT 23a2a8
<html> element must have a lang attribute589axe html-has-lang · Alfa sia-r4 · ACT b5c3f8
Elements must only use supported ARIA attributes379axe aria-allowed-attr · Alfa sia-r18 · ACT 5c01ea
Links must have discernible text250axe link-name · Alfa sia-r11 · ACT c487ae
Form elements must have labels124axe label · Alfa sia-r8 · ACT e086e5
Headings should not be empty29axe empty-heading · Alfa sia-r64 · ACT ffd0e9
Table cell headers attributes must refer to other <th> elements in the same table28axe td-headers-attr · Alfa sia-r45 · ACT a25f45
ARIA commands must have an accessible name17axe aria-command-name · Alfa sia-r12 · ACT 97a4e1
lang attribute must have a valid value1axe valid-lang · Alfa sia-r7 · ACT de46e4
Documents must have <title> element to aid in navigation1axe document-title · Alfa sia-r1 · ACT 2779a5