www.cdc.gov: Web standards & metadata — week 2026-W37
Web standards & metadata
Web-standards, metadata, and security checks in the spirit of ScanGov (methodology CC0), run across our scan rather than only the homepage.
Share of checked pages passing each standard (lowest first).
Standard
Pass rate
Pages
schema.org GovernmentOrganization markup
0%
0/1428
hreflang alternates declared
0%
5/1428
Open social presence (Mastodon/Bluesky) linked
0%
0/1428
Open Graph tags (0/6)
60%
852/1428
Twitter card metadata
60%
854/1428
Meta description present
71%
1010/1428
Canonical URL declared
73%
1044/1428
Character encoding declared
76%
1080/1428
Responsive viewport (zoom not disabled)
76%
1080/1428
Document language (lang) set
81%
1153/1428
Page has a <title>
100%
1428/1428
across 1428 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1428 page(s)
Capabilities that keep the site useful under real-world conditions — unreliable connectivity, interrupted sessions, mobile install. Not a compliance score: each row is independent evidence.
Progressive Web Resilience signals (lowest pass rate first).
Capability
Result
Why it matters
Evidence
Service worker registered
✗ 0/1428 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1428 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.