What technology does cdc.gov use?

cdc.gov is built with Bootstrap, jQuery.

Is cdc.gov secure (HTTPS)?

Yes. cdc.gov uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Oct 31, 2026.

Hosting provider information for cdc.gov is not available yet.

What is cdc.gov's SEO score?

cdc.gov scored 60/100 for SEO in the latest analysis (fair).

What is cdc.gov's overall website score?

cdc.gov has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.

Has cdc.gov's score changed over time?

cdc.gov's overall score has declined by 3 points (from 83 to 80) since Jul 15, 2026.

cdc.gov

Centers for Disease Control and Prevention | CDC

Last scanned Jul 29, 2026, 11:00 AM · 13 views

Overall score

Great

Summary

This website uses jQuery. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

10 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 meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
2 cookies without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+4 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

883 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

-3 overall since Jul 15, 2026

Overall: 80
SEO: 60
Security: 75
Performance: 100
Accessibility: 90

Organization

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

Facebook X (Twitter)Instagram LinkedIn YouTube

Contact

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

Phone: 800-232-4636

Meta tags

Title: Centers for Disease Control and Prevention | CDC
Description
Canonical: https://www.cdc.gov/index.html
Language: en-us
Charset: UTF-8
Viewport: width=device-width, initial-scale=1, shrink-to-fit=no
Robots meta: index, archive
Manifest: https://cdc.gov/TemplatePackage/5.0/json/manifest.json

Technologies

Detected frameworks, languages, and tools.

Bootstrap jQuery

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: DigiCert Inc
Subject: *.cdc.gov
Valid from: Apr 16, 2026
Valid to: Oct 31, 2026
Days until expiry: 94
SAN domains: *.cdc.gov, cdc.gov

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 0 · H2 5 · H3 0

Links

118 internal · 16 external · 20 broken

Images

21 total · 0 missing alt

Scripts / Styles

13 scripts · 3 stylesheets

JS / CSS size

1.5 KB · 46 B

Page size

59.9 KB

Robots.txt & Sitemap

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

SEO issues

Missing meta description
No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://cdc.gov
Final URL: https://cdc.gov/index.html
HTTP status: 200
HTTP version: HTTP/2
Response time: 882 ms
HTML size: 59.9 KB
Redirect chain: https://cdc.gov → https://cdc.gov/index.html

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does cdc.gov use?: cdc.gov is built with Bootstrap, jQuery.
Is cdc.gov secure (HTTPS)?: Yes. cdc.gov uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Oct 31, 2026.
Who hosts cdc.gov?: Hosting provider information for cdc.gov is not available yet.
What is cdc.gov's SEO score?: cdc.gov scored 60/100 for SEO in the latest analysis (fair).
What is cdc.gov's overall website score?: cdc.gov has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.
Has cdc.gov's score changed over time?: cdc.gov's overall score has declined by 3 points (from 83 to 80) since Jul 15, 2026.

Top issues to fix

Score history

Organization

Contact

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions