Cdc.gov - SEO Checker

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Overview of the SEO Check
Meta information
75% 
Page quality
82% 
Page structure
79% 
Link structure
40% 
Server
75% 
External factors
100% 
SEO Score
Response time
0.94 s
File size
53.30 kB
Words
747
Media files
23
Number of links
196 internal / 19 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Centers for Disease Control and Prevention | CDC
The length of the page title is perfect. (452 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.cdc.gov/index.html
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The character encoding is not specified in the HTTP header.
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
mobile-web-app-capableyes
apple-mobile-web-app-capableyes
msapplication-TileColor#0056b3
theme-color#0056b3
robotsindex, archive
DC.date2024-08-29T09:33:37Z
cdc:last_published2024-08-29T12:50:19Z
cdc:template_version5.0
article:authorCDC
cdc:first_publishedMay 15, 2024
cdc:last_updatedAugust 29, 2024
cdc:last_reviewedAugust 29, 2024
cdc:content_sourceCENTERS FOR DISEASE CONTROL AND PREVENTION
cdc:maintained_byCENTERS FOR DISEASE CONTROL AND PREVENTION
cdc:content_id41874
cdc:build3947
cdc:version4.24.7
cdc:page_typecdc_homepage
cdc:page_originwcms
cdc:wcms_build4.24.7 - b.3947
langen-us
twitter:cardsummary
twitter:titleCenters for Disease Control and Prevention
twitter:urlhttps://www.cdc.gov/index.html
twitter:site@CDCgov
twitter:creator@CDCgov
fb:app_id205691699516606
og:typearticle
og:titleCenters for Disease Control and Prevention
og:urlhttps://www.cdc.gov/index.html
og:site_nameEmpty
og:authorCDC
og:updated_time2024-08-29T09:33:37-04:00
X-UA-CompatibleIE=Edge
charsetUTF-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
This page contains 747 words. That's ok.
20.5% of the text are stop words.
The page contains a listing, which indicates a good text layout.
11 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 23.82 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 15 tags for this page.
Image SEO
(Somewhat important)
2 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...ePackage/5.0/img/uswds/us_flag_small.pngU.S. flag
...tePackage/5.0/img/uswds/icon-dot-gov.svgNo alt attribute provided
...latePackage/5.0/img/uswds/icon-https.svgNo alt attribute provided
/TemplatePackage/5.0/img/logo/logo2.svgCenters for Disease Control and Prevention
...kage/5.0/img/logo/cdc-logo-tag-right.svgCenters for Disease Control and Prevention
/homepage/images/poliovirus.jpgHealth Topics
...atePackage/5.0/img/homepage/outbreak.svgOutbreak
...atePackage/5.0/img/homepage/aboutcdc.pngAbout CDC
.../images/banner/ecigarette-1700x768-1.jpgE-cigarette Prevention Among Youth
...ages/banner/mosquito-bite-prevention.jpgPrevent Mosquito Bites
...age/images/banner/overdose-awareness.jpgInternational Overdose Awareness Day
...kage/5.0/img/logo/cdc-logo-tag-right.svgCenters for Disease Control and Prevention
/homepage/images/poliovirus.jpgHealth Topics
...atePackage/5.0/img/homepage/outbreak.svgOutbreak
...atePackage/5.0/img/homepage/aboutcdc.pngAbout CDC
/homepage/images/poliovirus.jpgHealth Topics
/TemplatePackage/5.0/img/homepage/mmwr.pngMMWR
/TemplatePackage/5.0/img/homepage/eid.pngEID
/TemplatePackage/5.0/img/homepage/pcd.pngPCD
/homepage/images/science-cdc.jpgScience at CDC
...ackage/5.0/img/homepage/cdc-director.jpgCDC Director Mandy K. Cohen, MD, MPH
...ackage/5.0/img/homepage/cdc-director.jpgCDC Director Mandy K. Cohen, MD, MPH
...kage/5.0/img/logo/logo-text-nous-wht.svgCenters for Disease Control and Prevention

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Featured Topics
H2 A to Z
H2 News All News
H2 Scientific Journals
H2 Science at CDC
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
1 links don't have an anchor text.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are 19 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.cdc.gov/Anchor Skip to site content
https://www.cdc.gov/Anchor Skip to search
https://www.cdc.gov/Anchor Here's how you know
https://www.cdc.gov/spanish/Subdomain Español
https://www.cdc.gov/spanish/Subdomain Text duplicate Español
https://www.cdc.gov/Subdomain IMG-ALT Centers for Disease Control and Prevention
/health-topics.htmlSubdomain Health Topics
/outbreaks/index.htmlSubdomain Outbreaks
https://www.cdc.gov/about/Subdomain About CDC
https://www.cdc.gov/Subdomain Text duplicate IMG-ALT Centers for Disease Control and Prevention
/health-topics.htmlSubdomain Text duplicate Health Topics
/health-topics.htmlSubdomain Text duplicate Health Topics
/alcohol/about-alcohol-use/ind...Alcohol
/antibiotic-use/about/index.htmlAntibiotic Use
/birth-defects/about/index.htmlBirth Defects
/dengue/about/index.htmlDengue
/hearing-loss/about/index.htmlHearing Loss
/high-blood-pressure/preventio...High Blood Pressure
/tobacco/about/index.htmlTobacco
/sti/about/index.htmlSexually Transmitted Infections (STI)
/shingles/about/index.htmlShingles
/niosh/twh/about/index.htmlTotal Worker Health
/polio/about/index.htmlPolio Vaccination
IMG-ALT Health Topics
/health-topics.htmlSubdomain A-Z Index
/outbreaks/index.htmlSubdomain outbreaks
/outbreaks/index.htmlSubdomain Text duplicate Outbreaks
/salmonella/turtles-08-24/inde...Small Turtles
/listeria/outbreaks/delimeats-...Meats Sliced at Delis
/salmonella/cotham-06-24/index...Subdomain Bearded Dragons
/salmonella/backyardpoultry-05...Backyard Poultry
/salmonella/basil-04-24/index....Fresh Basil
/measles/data-research/Measles
/lead-prevention/news/outbreak...Cinnamon Applesauce Pouches
/ecoli/outbreaks/organic-walnu...Organic Walnuts
/outbreaks/index.htmlSubdomain Find the latest outbreak information from CDC
IMG-ALT Outbreak
/outbreaks/index.htmlSubdomain All Outbreaks
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
/about/cdc/index.htmlText duplicate About CDC
/about/leadership/index.htmlLeadership
/about/organization/index.htmlOrganization
/about/cdc-director/index.htmlCheck-in with Dr. Cohen
/about/advisory-committee-dire...Advisory Committee to the Director
/about/speakers/index.htmlSpeakers Bureau
/museum/index.htmCDC Museum
/about/priorities/index.htmlAdvancing Science and Health Equity
/about/cdc-moving-forward.htmlMoving Forward
/about/cdc-foundation.htmlCDC Foundation
/about/divisions-offices/index...Mission and Org Charts
/labs/strong-lab-safety/index....Lab Safety
/about/cdc-moving-forward/newc...New CDC.gov
https://www.cdc.gov/about/Subdomain Learn more About CDC
IMG-ALT About CDC
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
/tobacco/tobacco-features/back...Learn More
/mosquitoes/prevention/index.htmlText duplicate Learn More
/overdose-prevention/php/toolk...Text duplicate Learn More
/tobacco/tobacco-features/back...E-cigarette Prevention Among Youth
/mosquitoes/prevention/index.htmlPrevent Mosquito Bites
/overdose-prevention/php/toolk...International Overdose Awareness Day
https://www.cdc.gov/Subdomain Text duplicate IMG-ALT Centers for Disease Control and Prevention
/health-topics.htmlSubdomain Text duplicate Health Topics
/health-topics.htmlSubdomain Text duplicate Health Topics
/alcohol/about-alcohol-use/ind...Text duplicate Alcohol
/antibiotic-use/about/index.htmlText duplicate Antibiotic Use
/birth-defects/about/index.htmlText duplicate Birth Defects
/dengue/about/index.htmlText duplicate Dengue
/hearing-loss/about/index.htmlText duplicate Hearing Loss
/high-blood-pressure/preventio...Text duplicate High Blood Pressure
/tobacco/about/index.htmlText duplicate Tobacco
/sti/about/index.htmlText duplicate Sexually Transmitted Infections (STI)
/shingles/about/index.htmlText duplicate Shingles
/niosh/twh/about/index.htmlText duplicate Total Worker Health
/polio/about/index.htmlText duplicate Polio Vaccination
IMG-ALT Health Topics
/health-topics.htmlSubdomain Text duplicate A-Z Index
/outbreaks/index.htmlSubdomain Text duplicate outbreaks
/outbreaks/index.htmlSubdomain Text duplicate Outbreaks
/salmonella/turtles-08-24/inde...Text duplicate Small Turtles
/listeria/outbreaks/delimeats-...Text duplicate Meats Sliced at Delis
/salmonella/cotham-06-24/index...Subdomain Text duplicate Bearded Dragons
/salmonella/backyardpoultry-05...Text duplicate Backyard Poultry
/salmonella/basil-04-24/index....Text duplicate Fresh Basil
/measles/data-research/Text duplicate Measles
/lead-prevention/news/outbreak...Text duplicate Cinnamon Applesauce Pouches
/ecoli/outbreaks/organic-walnu...Text duplicate Organic Walnuts
/outbreaks/index.htmlSubdomain Text duplicate Find the latest outbreak information from CDC
IMG-ALT Outbreak
/outbreaks/index.htmlSubdomain Text duplicate All Outbreaks
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
/about/cdc/index.htmlText duplicate About CDC
/about/leadership/index.htmlText duplicate Leadership
/about/organization/index.htmlText duplicate Organization
/about/cdc-director/index.htmlText duplicate Check-in with Dr. Cohen
/about/advisory-committee-dire...Text duplicate Advisory Committee to the Director
/about/speakers/index.htmlText duplicate Speakers Bureau
/museum/index.htmText duplicate CDC Museum
/about/priorities/index.htmlText duplicate Advancing Science and Health Equity
/about/cdc-moving-forward.htmlText duplicate Moving Forward
/about/cdc-foundation.htmlText duplicate CDC Foundation
/about/divisions-offices/index...Text duplicate Mission and Org Charts
/labs/strong-lab-safety/index....Text duplicate Lab Safety
/about/cdc-moving-forward/newc...Text duplicate New CDC.gov
https://www.cdc.gov/about/Subdomain Text duplicate Learn more About CDC
IMG-ALT About CDC
https://www.cdc.gov/about/Subdomain Text duplicate About CDC
/bird-flu/situation-summary/in...H5 Bird Flu: Current Situation
/respiratory-viruses/about/ind...Respiratory Illnesses
/poxvirus/mpox/outbreak/2023-d...Mpox Outbreak in Eastern Africa
/dengue/prevention/Preventing Dengue
/oropouche/about/index.htmlOropouche
/vaccines/imz-schedules/adoles...Teen Vaccination
/extreme-heat/about/index.htmlSummer Heat Safety
/health-topics.htmlSubdomain Anchor A
/health-topics.htmlSubdomain Anchor B
/health-topics.htmlSubdomain Anchor C
/health-topics.htmlSubdomain Anchor D
/health-topics.htmlSubdomain Anchor E
/health-topics.htmlSubdomain Anchor F
/health-topics.htmlSubdomain Anchor G
/health-topics.htmlSubdomain Anchor H
/health-topics.htmlSubdomain Anchor I
/health-topics.htmlSubdomain Anchor J
/health-topics.htmlSubdomain Anchor K
/health-topics.htmlSubdomain Anchor L
/health-topics.htmlSubdomain Anchor M
/health-topics.htmlSubdomain Anchor N
/health-topics.htmlSubdomain Anchor O
/health-topics.htmlSubdomain Anchor P
/health-topics.htmlSubdomain Anchor Q
/health-topics.htmlSubdomain Anchor R
/health-topics.htmlSubdomain Anchor S
/health-topics.htmlSubdomain Anchor T
/health-topics.htmlSubdomain Anchor U
/health-topics.htmlSubdomain Anchor V
/health-topics.htmlSubdomain Anchor W
/health-topics.htmlSubdomain Anchor X
/health-topics.htmlSubdomain Anchor Y
/health-topics.htmlSubdomain Anchor Z
/health-topics.htmlSubdomain Anchor #
/polio/about/index.htmlText duplicate Polio Vaccination
IMG-ALT Health Topics
https://www.cdc.gov/media/Subdomain All News
/media/releases/2024/s0828-lis...AUG 28 More illnesses and deaths in Listeria outbreak linked to deli meats is reminder to avoid recalled products
/media/releases/2024/p0827-mat...AUG 27 Biden-Harris Administration Awards Over $558 Million to Improve Maternal Health, including $440 Million to Support Pregnant and New Moms, Infants, and...
/media/releases/2024/s0822-mpo...AUG 22 FACT SHEET: United States Response to the Clade I Mpox Outbreak in Several African Countries
/media/releases/2024/s0816-sal...AUG 16 CDC Investigation Notice: Tiny turtles, illegal to sell as pets, causing Salmonella illnesses again in young kids
/media/releases/2024/t0814-vs-...AUG 13 Transcript for Vital Signs Telebriefing: Vaccines for Children Program Celebrates 30 Years of Providing Lifesaving Vaccinations to Children at No Cost
/mmwr/index.htmlSubdomain MMWR is a weekly epidemiological digest that provides timely, reliable, objective, and useful public health information. Learn More
IMG-ALT MMWR
https://wwwnc.cdc.gov/eid/External Subdomain EID is a monthly peer reviewed journal covering infectious diseases with emphasis on disease prevention, control, and elimination. Learn More
IMG-ALT EID
https://www.cdc.gov/pcd/index.htmSubdomain PCD is a peer reviewed journal covering research, public health findings, innovations, and practices on chronic diseases. Learn More
IMG-ALT PCD
/about/cdc-moving-forward.htmlCDC Moving Forward
/about/priorities/index.htmlAdvancing Science & Health Equity
https://www.cdc.gov/about/Text duplicate About CDC
/about/leadership/director.htmlIMG-ALT CDC Director Mandy K. Cohen, MD, MPH
/about/leadership/director.htmlCDC Director
https://www.cdc.gov/about/Text duplicate About CDC
/about/organization/Organization and Mission
/about/leadership/Text duplicate Leadership
/labs/strong-lab-safety/Text duplicate Lab Safety
https://www.cdc.gov/budget/Subdomain Funding and Grants
https://jobs.cdc.gov/index.htmlExternal Subdomain Careers at CDC
/fellowships/php/index.htmlSubdomain Fellowships and Training
https://www.cdc.gov/museum/Subdomain Text duplicate CDC Museum
/about/leadership/director.htmlText duplicate IMG-ALT CDC Director Mandy K. Cohen, MD, MPH
/about/leadership/director.htmlText duplicate CDC Director
https://www.cdc.gov/Anchor Contact Us
https://www.cdc.gov/Anchor Text duplicate About CDC
https://www.cdc.gov/Anchor Policies
https://www.cdc.gov/Anchor Languages
https://www.cdc.gov/Anchor Archive
/cdc-info/forms/contact-us.htmlSubdomain Text duplicate Contact Us
/cdc-info/forms/contact-us.htmlSubdomain Contact CDC
https://www.cdc.gov/about/Text duplicate About CDC
/about/organization/index.htmlSubdomain Mission & Organization
https://www.cdc.gov/budget/Subdomain Budget & Funding
https://jobs.cdc.gov/index.htmlExternal Subdomain Careers & Jobs
/other/accessibility.htmlSubdomain Accessibility
/Other/disclaimer.htmlSubdomain Anchor External Links
/other/privacy.htmlSubdomain Privacy
/Other/policies.htmlSubdomain Web Policies
https://www.cdc.gov/od/foiaSubdomain FOIA
https://oig.hhs.gov/External Subdomain OIG
/oeeowe/nofearact/Subdomain No Fear Act
/other/nondiscrimination.htmlSubdomain Nondiscrimination
https://www.hhs.gov/vulnerabil...External Subdomain Vulnerability Disclosure Policy
https://wwwn.cdc.gov/pubs/othe...External Subdomain Text duplicate Languages
https://www.cdc.gov/spanish/Subdomain Text duplicate Español
https://wwwn.cdc.gov/pubs/othe...External Subdomain Multilingual Content
https://dfe-stage.cdc.gov/othe...External Subdomain Anchor Language Assistance
/other/language-assistance.htmlSubdomain Anchor Text duplicate Español
/other/language-assistance.htmlSubdomain Anchor 繁體中文
/other/language-assistance.htmlSubdomain Anchor Tiếng Việt
/other/language-assistance.htmlSubdomain Anchor 한국어
/other/language-assistance.htmlSubdomain Anchor Tagalog
/other/language-assistance.htmlSubdomain Anchor Русский
/other/language-assistance.htmlSubdomain Anchor العربية
/other/language-assistance.htmlSubdomain Anchor Kreyòl Ayisyen
/other/language-assistance.htmlSubdomain Anchor Français
/other/language-assistance.htmlSubdomain Anchor Polski
/other/language-assistance.htmlSubdomain Anchor Português
/other/language-assistance.htmlSubdomain Anchor Italiano
/other/language-assistance.htmlSubdomain Anchor Deutsch
/other/language-assistance.htmlSubdomain Anchor 日本語
/other/language-assistance.htmlSubdomain Anchor فارسی
/other/language-assistance.htmlSubdomain Anchor English
https://archive.cdc.gov/External Subdomain Web Archive
https://stacks.cdc.gov/External Subdomain Public Health Publications
https://www.cdc.gov/Text duplicate IMG-ALT Centers for Disease Control and Prevention
https://www.facebook.com/CDCExternal Subdomain No Text
https://twitter.com/CDCgovExternal No Text
https://www.instagram.com/CDCgovExternal Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.youtube.com/cdcExternal Subdomain No Text
https://www.pinterest.com/cdcgovExternal Subdomain No Text
https://www.snapchat.com/add/c...External Subdomain No Text
https://www.cdc.gov/rssSubdomain No Text
https://hhs.gov/External HHS.gov
https://usa.gov/External USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.cdc.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time of 0.94 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (53 kB).

HTTP Response Header

NameValue
content-typetext/html
srv6
access-control-allow-origin*
x-ua-compatibleIE=edge
access-control-allow-headersAccess-Control-Allow-Headers, Origin, Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers
varyAccept-Encoding
content-encodinggzip
content-length8828
dateMon, 02 Sep 2024 04:26:32 GMT
set-cookie108 Characters
strict-transport-securitymax-age=31536000 ; includeSubDomains ; preload
statuscode200
http_versionHTTP/2

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 405,687 referring domains.
This page has 52,551,862 backlinks.
This page has backlinks from 170,339 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# Ignore FrontPage files
User-agent: *
Disallow: /_borders
Disallow: /_derived
Disallow: /_fpclass
Disallow: /_overlay
Disallow: /_private
Disallow: /_themes
Disallow: /_vti_bin
Disallow: /_vti_cnf
Disallow: /_vti_log
Disallow: /_vti_map
Disallow: /_vti_pvt
Disallow: /_vti_txt

# Do not index the following URLs
Disallow: /travel/
Disallow: /flu/espanol/
Disallow: /migration/
Disallow: /Features/SpinaBifidaProgram/
Disallow: /concussion/HeadsUp/training/
Disallow: /niosh/archive/
Disallow: /TemplatePackage/examples
Disallow: /TemplatePackage/gadgets
Disallow: /TemplatePackage/modules
Disallow: /TemplatePackage/subtopic
Disallow: /TemplatePackage/Templates
Disallow: /TemplatePackage/3.0/examples
Disallow: /TemplatePackage/3.0/Templates
Disallow: /TemplatePackage/4.0/docs
Disallow: /TemplatePackage/4.0/gallery-internal
Disallow: /templatepackage/examples
Disallow: /templatepackage/gadgets
Disallow: /templatepackage/modules
Disallow: /templatepackage/subtopic
Disallow: /templatepackage/Templates
Disallow: /templatepackage/templates
Disallow: /templatepackage/3.0/examples
Disallow: /templatepackage/3.0/Templates
Disallow: /templatepackage/3.0/templates
Disallow: /templatepackage/4.0/docs
Disallow: /templatepackage/4.0/gallery-internal

# Rover is a bad dog
User-agent: Roverbot
Disallow: /

# EmailSiphon is a hunter/gatherer which extracts email addresses for spam-mailers to use
User-agent: EmailSiphon
Disallow: /

# Exclude MindSpider since it appears to be ill-behaved
User-agent: MindSpider
Disallow: /

# Sitemap link per CR14586
Sitemap: https://www.cdc.gov/wcms-auto-sitemap-index.xml

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Search preview

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
CDC64%Check
gov52%Check
Prevention49%Check
disease48%Check
Disease Prevention48%Check
control44%Check
Science42%Check
HTTPS41%Check
Disease Control41%Check
Topics40%Check
Show more keywords and terms

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