What powers 
vaccinesafety.edu?
Last seen Sep 2026 · 25 technologies across 13 categories
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
PaaS
Page builders
Performance
Programming languages
Search engines
UI frameworks
WordPress themes
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| mmr immunization | #45 | 350 |
| mmr | #15 | 250 |
| polio vaccine | #25 | 190 |
| opv polio | #28 | 190 |
| poliovirus vaccine | #28 | 190 |
| opv vaccine | #31 | 190 |
| poliomyelitis vaccine | #45 | 190 |
| zoster immunization | #18 | 180 |
| polio shot | #23 | 140 |
| tdap and dtap | #28 | 140 |
| mumps mmr vaccine | #28 | 130 |
| measles mumps rubella | #36 | 130 |
| haemophilus influenzae vaccine | #40 | 100 |
| haemophilus influenzae type b vaccine | #59 | 100 |
| is the tdap vaccine safe | #3 | 73 |
| what is tdap vaccine | #37 | 64 |
| ipv vaccine | #21 | 62 |
| measles mumps rubella vaccine side effects | #33 | 57 |
| vaccine inserts | #4 | 47 |
| gbs flu shot | #7 | 41 |
| guillain barre syndrome flu shot | #7 | 41 |
| vaccine excipient summary appendix b | #5 | 34 |
| varicella zoster vaccine shingles | #7 | 33 |
| varicella vaccine name | #12 | 33 |
| dtp vaccine vs dtap | #24 | 31 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 52% desktop
- 48% phone
United States
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.90 / 10 · ranked #117,118 of all domains
279 referring domains · OpenPageRank
Search traffic
5,000 est. monthly organic visits (US)
2,435 keywords in Google's top 30
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Amazon CloudFront
- Weight: 1.3 MB · 94 requests
- WordPress theme: hello-elementor (child: ele-child) · all themes
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (18.173.166.52, IPv6)
- DNS: Cloudflare DNS
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC reject
- SSL: Amazon Trust Services, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 51,387, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped All in One SEO Sep 2026
- dropped Google Analytics Sep 2026
- dropped MonsterInsights Sep 2026
- dropped Open Graph Sep 2026
- dropped HSTS Jun 2026
- detected All in One SEO May 2026
- detected Amazon S3 May 2026
- dropped Cloudflare Browser Insights May 2026
- dropped HTTP/3 May 2026
- dropped Yoast SEO May 2026
- detected Twitter Emoji (Twemoji) Apr 2026
- dropped All in One SEO Jan 2026
- detected Cloudflare Browser Insights Nov 2025