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SGSiteGraph

historyofvaccines.org

Last scanned Aug 24, 2026, 1:22 PM · 1 view

72

Overall score

Fair

Summary

This website uses Google Analytics hosted on AWS behind Netlify CDN. SEO is poor (45/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance fair (70/100). Top issue: Missing <title>.

United States
Hosted on AWS

Top issues to fix

9 issues found · 3 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing title tag

    SEO

    Add a unique, descriptive <title> tag — it's the single most important on-page SEO element.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

  • Missing OpenGraph tags

    SEO

    Add og:title/og:description/og:image so shared links render a proper preview card.

+3 more issues — details in the sections below.

45

SEO

7 issue(s) found

70

Performance

63 ms

90

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

InstagramFacebook

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
Description
Canonical
Language
Charset
utf-8
Viewport
width=device-width, initial-scale=1, shrink-to-fit=no
Robots meta
Manifest
https://historyofvaccines.org/manifest.webmanifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

GatsbyGoogle Analytics

Hosting & CDN

Hosting provider
AWS
CDN provider
Netlify
IP address
13.215.239.219
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 13.215.239.219
  • 52.74.6.109
AAAA—
MX
  • aspmx4.googlemail.com
  • aspmx3.googlemail.com
  • aspmx5.googlemail.com
  • aspmx2.googlemail.com
  • aspmx.l.google.com
  • alt2.aspmx.l.google.com
TXT—
NS
  • dns3.p06.nsone.net
  • dns4.p06.nsone.net
  • dns1.p06.nsone.net
  • dns2.p06.nsone.net
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
historyofvaccines.org
Valid from
Aug 20, 2026
Valid to
Nov 18, 2026
Days until expiry
85
SAN domains
*.historyofvaccines.org, historyofvaccines.blog, historyofvaccines.org

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyEnabled
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 15 · H3 8

Links

26 internal · 10 external · 0 broken

Images

16 total · 0 missing alt

Scripts / Styles

17 scripts · 0 stylesheets

JS / CSS size

3.5 MB · 135 KB

Page size

216 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing <title>
  • Missing meta description
  • Missing canonical link
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Missing <html lang> attribute

Scan details

Requested URL
https://historyofvaccines.org
Final URL
https://historyofvaccines.org
HTTP status
200
HTTP version
HTTP/2
Response time
59 ms
HTML size
216 KB
Redirect chain
https://historyofvaccines.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does historyofvaccines.org use?
historyofvaccines.org is built with Gatsby, Google Analytics.
Is historyofvaccines.org secure (HTTPS)?
Yes. historyofvaccines.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 18, 2026.
Who hosts historyofvaccines.org?
historyofvaccines.org is hosted on AWS, behind Netlify CDN.
What is historyofvaccines.org's SEO score?
historyofvaccines.org scored 45/100 for SEO in the latest analysis (poor).
What is historyofvaccines.org's overall website score?
historyofvaccines.org has an overall SiteGraph score of 72/100, combining SEO, performance, security, and accessibility.