www.cdc.gov: Web standards & metadata — week 2026-W33
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%
0/1463
hreflang alternates declared
0%
0/1463
Open social presence (Mastodon/Bluesky) linked
0%
0/1463
Open Graph tags (6/6)
60%
881/1463
Twitter card metadata
60%
882/1463
Meta description present
72%
1052/1463
Canonical URL declared
74%
1080/1463
Character encoding declared
75%
1098/1463
Responsive viewport (zoom not disabled)
75%
1098/1463
Document language (lang) set
83%
1219/1463
Page has a <title>
100%
1462/1463
across 1463 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1463 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
✗ 0/1463 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1463 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.