Accessibility
· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.DDark Mode SupportActionTheme color onlyFIX
Detection limited to meta tags and inline styles.
BHeading Hierarchy5 headingsREVIEW
- H2 Featured Topics
- H2 A to Z
- H2 News All News
- H2 Scientific Journals
- H2 Science at CDC
Every page should have one H1 that describes the page content.
No H1 means screen-reader users can't identify the page's primary topic, and Google's content-extraction degrades.
Learn more ▾ ▴
The H1 is the document title for assistive tech and a strong signal to search engines about page topic. Pages without one force screen readers to fall back to the <title> attribute or page chrome. Add a single H1 that names the page's primary subject.
Source: WCAG 2.4.6 / Google Search Central
CLink & Button QualityAction12 issue(s) across 256 links and 12 buttonsREVIEW
| Element | Text | Issue | Suggested Fix |
|---|---|---|---|
| # | (empty) | empty | Add link text or aria-label |
| /ecoli/outbreaks/rawcheese-03-26/index.h… | Learn More | generic text | Replace with descriptive text |
Before: Learn More Suggested: Index.Html | |||
| /measles/about/index.html | Learn More | generic text | Replace with descriptive text |
Before: Learn More Suggested: Index.Html | |||
| /global-health-protection/php/campaigns-… | Learn More | generic text | Replace with descriptive text |
Before: Learn More Suggested: Outbreaks You Never Heard About.Html | |||
| https://www.facebook.com/CDC | (empty) | empty | Add link text or aria-label |
| https://twitter.com/CDCgov | (empty) | empty | Add link text or aria-label |
| https://www.instagram.com/CDCgov | (empty) | empty | Add link text or aria-label |
| https://www.linkedin.com/company/centers… | (empty) | empty | Add link text or aria-label |
| https://www.youtube.com/cdc | (empty) | empty | Add link text or aria-label |
| https://www.pinterest.com/cdcgov | (empty) | empty | Add link text or aria-label |
| https://www.snapchat.com/add/cdcgov | (empty) | empty | Add link text or aria-label |
| https://www.cdc.gov/rss | (empty) | empty | Add link text or aria-label |
Links without text are announced as raw URLs by screen readers.
#; https://www.facebook.com/CDC; https://twitter.com/CDCgov; https://www.instagram.com/CDCgov; https://www.linkedin.com/company/centers-for-disease-control-and-prevention; https://www.youtube.com/cdc; https://www.pinterest.com/cdcgov; https://www.snapchat.com/add/cdcgov; https://www.cdc.gov/rss
Links with no accessible text (empty <a></a>, image-only no alt, icon-only no aria-label) are unidentifiable to screen readers.
Source: WCAG 2.1 SC 2.4.4
Generic link text like 'click here' doesn't describe the destination.
/ecoli/outbreaks/rawcheese-03-26/index.html ("Learn More"); /measles/about/index.html ("Learn More"); /global-health-protection/php/campaigns-and-awareness/outbreaks-you-never-hea… ("Learn More")
Generic anchor text ('click here', 'read more', 'learn more') tells screen readers and search engines nothing about the destination.
Learn more ▾ ▴
Out-of-context lists of links read by AT (one navigation pattern) become useless when every link says 'click here'. Use the destination's title or topic as anchor text. Doubles as SEO win — Google passes anchor-text relevance to the destination.
Source: WCAG 2.4.4 / Google Search Central
BFavicon & Branding6 icon(s) detectedREVIEW
CWeb ManifestActionValid manifestREVIEW
CColor Contrast (Screenshot)Action20 text elements analyzed, 7 fail WCAG AAREVIEW
Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.
Show all checked elements (20)
| Element | Ratio | Required | FG | BG | Result |
|---|---|---|---|---|---|
| h2 Featured Topics | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 A to Z | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Scientific Journals | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Science at CDC | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| title Centers for Disease … | 21.00:1 | 4.5:1 | #000000 | #FFFFFF | Pass |
| a Skip to site content | 21.00:1 | 4.5:1 | #000000 | #FFFFFF | Pass |
| a Skip to search | 21.00:1 | 4.5:1 | #000000 | #FFFFFF | Pass |
| span An official website … | 12.09:1 | 4.5:1 | #000000 | #99CDD9 | Pass |
| a Here's how you know | 4.65:1 | 4.5:1 | #000000 | #0081A1 | Pass |
| a Español | 4.13:1 | 4.5:1 | #000000 | #057895 | Fail |
| b Official websites us… | 4.18:1 | 3.0:1 | #000000 | #057996 | Pass |
| p A .gov website belon… | 4.18:1 | 4.5:1 | #000000 | #057995 | Fail |
| b Secure .gov websites… | 4.34:1 | 3.0:1 | #000000 | #0A7C97 | Pass |
| strong lock | 4.46:1 | 3.0:1 | #000000 | #0E7E99 | Pass |
| p ) or | 4.12:1 | 4.5:1 | #000000 | #077894 | Fail |
| strong https:// | 4.22:1 | 3.0:1 | #000000 | #097A94 | Pass |
| p means you've safely … | 4.28:1 | 4.5:1 | #000000 | #0B7B95 | Fail |
| a Español | 4.23:1 | 4.5:1 | #000000 | #0A7A95 | Fail |
| span Close | 4.23:1 | 4.5:1 | #000000 | #0A7A95 | Fail |
| span Search | 4.34:1 | 4.5:1 | #000000 | #0B7C97 | Fail |
Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.
ALandmark Structure14 landmarksPASS
Multiple navigations need aria-label to distinguish them for screen readers.
Some <nav> elements lack aria-label — screen-reader users hear 'navigation' multiple times with no way to distinguish them.
Learn more ▾ ▴
When a page has multiple <nav> regions (primary, footer, breadcrumb), each needs aria-label or aria-labelledby. AT users navigate by landmark; identical 'navigation' announcements force them to enter each one to discover purpose.
Source: WAI-ARIA Authoring Practices
AAlt Text Quality1 of 22 images have issuesPASS
| Issue | Count |
|---|---|
| missing | 1 image(s) |
Images without alt text are invisible to screen readers.
Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.
Learn more ▾ ▴
WCAG 2.1 Level A requires text alternatives for non-decorative images. Empty alt='' is fine for decorative; meaningful images need descriptive text. Common fixes: CMS audit + bulk add, build-time linter (alt-text-required ESLint rule), CI gate on Lighthouse a11y score.
Source: WCAG 2.1 SC 1.1.1 / WebAIM Million Report
A+Form AccessibilityAll 3 controls labeledPASS
| Control | Type | Label | Method |
|---|---|---|---|
| query | search | Search | aria-label |
| query | search | Search | aria-label |
| query | search | Search | aria-label |
A404 Error PageHTTP 404, custom pagePASS
A+Print StylesheetPrint styles detectedPASS
ALighthouse Accessibility AuditsScore 91/100 — 3 failing, 23 passedPASS
Accessibility
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
Names and labels
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
nav.mobile-navbar > div.mobile-navbar_top > div.d-flex > a#cdc-mobile-search-toggle nav.mobile-navbar > div.mobile-navbar_top > div.d-flex > a#cdc-mobile-search-toggle |
Including a skip link can help users skip to the main content to save time. Learn more about skip links.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Skip to search body.cdc-post-type--cdc-homepage > div#skipmenu > a.skippy |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Navigation
A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Skip to site content body.cdc-post-type--cdc-homepage > div#skipmenu > a.skippy |
Skip to search body.cdc-post-type--cdc-homepage > div#skipmenu > a.skippy |
Pause carousel div#hero-carousel > div.carousel-indicators > div.carousel-indicators-wrapper > button#animation-toggle |
These are opportunities to improve keyboard navigation in your application.