Cdc.gov - SEO Checker

Overview of the SEO Check
Meta information
95% 
Page quality
85% 
Page structure
79% 
Link structure
58% 
Server
86% 
External factors
100% 
SEO Score
Response time
0.03 s
File size
152.60 kB
Words
647
Media files
17
Number of links
122 internal / 44 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Centers for Disease Control and Prevention
The length of the page title is perfect. (391 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
As the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.
The length of the meta description is perfect. (732 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.cdc.gov/index.htm
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
descriptionAs the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.
keywordsCDC, 24/7, protect America, health, safety, security threats, foreign, U.S. diseases, chronic, acute, curable, preventable, human error, deliberate attack, supports communities, CDC Organization
robotsindex, archive
DC.date2020-10-22T06:43:17Z
cdc:last_published2020-10-22T18:59:21Z
article:published_time2020-10-22
article:authorCDC
cdc:template_version4.0
cdc:last_updatedOctober 22, 2020
cdc:last_reviewedOctober 22, 2020
cdc:content_sourceCENTERS FOR DISEASE CONTROL AND PREVENTION
cdc:maintained_byDIGITAL MEDIA BRANCH
cdc:content_id21899
cdc:wcms_build4.9.8.1 - b.2857
langen-us
twitter:cardsummary_large_image
twitter:site@CDCgov
twitter:creator@CDCgov
twitter:titleCDC Works 24/7
twitter:descriptionAs the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.
twitter:image:srchttps://www.cdc.gov/homepage/images/centers-for-disease-control-and-prevention.png
fb:app_id205691699516606
og:titleCDC Works 24/7
og:descriptionAs the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.
og:urlhttps://www.cdc.gov/index.htm
og:imagehttps://www.cdc.gov/homepage/images/centers-for-disease-control-and-prevention.png
og:image:typeimage/png
og:authorCDC
og:site_nameCenters for Disease Control and Prevention
og:typearticle
X-UA-CompatibleIE=Edge
charsetutf-8

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Page quality

Content
(Critically important)
This page contains 647 words. That's ok.
21.5% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 16.2 words is good.
Frames
(Critically important)
This website does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This website loads 9 javascript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 13 tags for this page.
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
...covid-19-home-page-banner-1330x370px.jpg3D illustration of the novel coronavirusCoronavirus Disease 2019
...s/cards/COVID-19-Halloween-720x400px.jpgLittle girl in witch costume on Halloween trick or treat
...ages/cards/world-polio-day-720x400px.jpglittle boy smiling holding up his purple pinkie
...s/cards/protect-family-flu-720x400px.jpgelderly woman and caregiver wearing masks
...ds/wildfire-smoke-covid-19-700x400px.jpgwildfire and smoke on mountain side
/homepage/images/outbreaks-secondary.pnggerm illustration
/homepage/images/outbreaks-secondary.pnggerm illustration
/homepage/images/outbreaks-secondary.pnggerm illustration
/homepage/images/outbreaks-secondary.pnggerm illustration
.../cdc-in-action/sanchez-ppe-647x381px.jpgman wearing face mask and plastic face shield
...a-response-rosalind-carter-647x381px.jpgRosalind Carter, right, and a Ugandan colleague prepare to give the Ebola vaccine to health workers
...ages/cdc-in-action/fellowships-720px.jpgSmithsonian Museum Logo
...es/cdc-in-action/IamCdcMcAleer_720px.jpgMeet Sharon
...epage/images/cdc-in-action/about-cdc.jpgAbout CDC
/homepage/images/science/mmwr.pngMorbidity and Mortality Weekly Report Journal
/homepage/images/science/eid.pngEmerging Infectious Diseases Journal
/homepage/images/science/pcd.pngPreventing Chronic Disease Journal

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
H4 Exit Notification/Disclaimer Policy
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
There are 2 links with a trivial anchor text.
The amount of internal links is ok.
All internal links don't have dynamic parameters.
There are too many external links (44) on this page.
LinkAttributesAnchor text
https://www.cdc.gov/Anchor Skip directly to site content
https://www.cdc.gov/Anchor Skip directly to A-Z link
https://www.cdc.gov/spanish/Español
https://wwwn.cdc.gov/pubs/othe...External Other Languages
https://www.cdc.gov/Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People Centers for Disease Control and Prevention. CDC twenty fou...
https://www.cdc.gov/az/A-Z Index
https://search.cdc.gov/search/...External Anchor Advanced Search
https://search.cdc.gov/search/...External Anchor Text duplicate Advanced Search
https://www.cdc.gov/nCoV/Coronavirus Disease 2019
https://www.cdc.gov/ncbddd/adhd/ADHD
https://www.cdc.gov/cancer/Cancer
/copd/index.htmlCOPD
/diabetes/index.htmlDiabetes
https://www.cdc.gov/flu/index.htmFlu (Influenza)
https://www.cdc.gov/heartdisease/Heart Disease
https://www.cdc.gov/std/Sexually Transmitted Diseases (STDs)
/DataStatistics/Data & Statistics
/DiseasesConditions/Trivial anchor text
More
/healthyyouth/index.htmAdolescent & School Health
https://www.cdc.gov/foodsafety/Food Safety
/healthyweight/Healthy Weight
/obesity/index.htmlOverweight & Obesity
https://www.cdc.gov/tobacco/Smoking & Tobacco Use
https://www.cdc.gov/vaccines/Vaccines & Immunizations
/HealthyLiving/Text duplicate Trivial anchor text
More
https://wwwnc.cdc.gov/travel/d...External Destinations
https://wwwnc.cdc.gov/travel/n...External Travel Notices
https://wwwnc.cdc.gov/travel/p...External Find a Clinic
https://wwwnc.cdc.gov/travel/d...External Disease Directory
https://wwwnc.cdc.gov/travel/p...External Yellow Book
https://wwwnc.cdc.gov/travel/External Text duplicate Trivial anchor text
More
/prepyourhealth/index.htmPrepare Your Health
https://emergency.cdc.gov/disa...External Natural Disasters & Severe Weather
https://emergency.cdc.gov/rece...External Recent Outbreaks & Incidents
/flu/pandemic-resources/index.htmPandemic Preparedness
https://emergency.cdc.gov/biot...External Bioterrorism
https://emergency.cdc.gov/chem...External Chemical Emergencies
/nceh/radiation/emergencies/in...Radiation Emergencies
/childrenindisasters/Caring for Children in a Disaster
https://emergency.cdc.gov/External Text duplicate Trivial anchor text
More
/DataStatistics/Text duplicate Data & Statistics
https://emergency.cdc.gov/External Emergency Preparedness
https://www.cdc.gov/injury/Injury, Violence & Safety
https://www.cdc.gov/nceh/Environmental Health
https://www.cdc.gov/niosh/Workplace Safety & Health
/globalhealth/index.htmlGlobal Health
/stltpublichealth/index.htmlState, Tribal, Local & Territorial
https://www.cdc.gov/dotw/Disease or Condition of the Week
/vitalsigns/index.htmlVital Signs
https://www.cdc.gov/publications/Publications
/socialmedia/index.htmlSocial & Digital Tools
https://www.cdc.gov/mobile/Mobile Apps
https://www.cdc.gov/cdctv/CDC-TV
/Features/index.htmlCDC Feature Articles
https://jobs.cdc.gov/External CDC Jobs
https://go.usa.gov/xygXtExternal Podcasts
https://www.cdc.gov/CDC Home
/coronavirus/2019-nCoV/index.htmlCoronavirus Disease 2019 CDC is responding to the novel coronavirus outbreak. Learn More About COVID-19
IMG-ALT 3D illustration of the novel coronavirus
https://www.cdc.gov/Anchor Minus
/coronavirus/2019-ncov/daily-l...COVID-19 and Halloween Enjoy Halloween activities and take steps to protect yourself from getting or spreading COVID-19.
IMG-ALT Little girl in witch costume on Halloween trick or treat
/globalhealth/immunization/wpd...World Polio Day Learn about the global effort to eradicate polio.
IMG-ALT little boy smiling holding up his purple pinkie
/flu/prevent/prevention.htmProtect Yourself & Your Family from Flu Everyone 6 months of age and older should get annual flu vaccine by the end of October.
IMG-ALT elderly woman and caregiver wearing masks
/disasters/covid-19/wildfire_s...Wildfire Smoke & COVID-19 Protect yourself and your family from wildfire smoke during the pandemic.
IMG-ALT wildfire and smoke on mountain side
/salmonella/stanley-09-20/inde...Wood Ear Mushrooms – Salmonella Infections
/salmonella/typhimurium-09-20/...Pet Hedgehogs – Salmonella Infections
https://www.cdc.gov/nCoVCoronavirus Disease 2019 (COVID-19)
/tobacco/basic_information/e-c...Lung Injury Associated with E-cigarette Use or Vaping
/outbreaks/index.htmlMore Outbreaks
/media/releases/2020/p1023-lea...National Lead Poisoning Prevention Week: Get the Facts – and Get Your Home and Child Tested
/media/releases/2020/s1023-mul...CDC investigating Multistate Outbreak of Listeria Infections Linked to Deli Meats
/media/releases/2020/t1021-cdc...CDC Media Telebriefing Transcript on Operation Warp Speed
/media/index.htmlMore News
/coronavirus/2019-ncov/cases-u...COVID-19 Response Learn how CDC is responding to the COVID-19 pandemic.
IMG-ALT man wearing face mask and plastic face shield
/vhf/ebola/outbreaks/responder...Ebola Response Find out about what our Ebola responders are doing as they tell you their stories.
IMG-ALT Rosalind Carter, right, and a Ugandan colleague prepare to give the Ebola vaccine to health workers
/fellowships/index.htmlFellowships & Internships CDC has many diverse learning opportunities for students and professionals.
IMG-ALT Smithsonian Museum Logo
/about/24-7/i-am-cdc/index.htmlMeet Sharon Meet people who work 24/7 to defend America from health threats. Check out the newest “I am CDC” video.
IMG-ALT Meet Sharon
/about/default.htmAbout CDC
/about/organization/cio.htmCDC Organization
/about/organization/mission.htmMission, Roles & Pledge
https://www.cdc.gov/Budget/Budget & Funding
/museum/index.htmDavid J. Sencer CDC Museum
https://www.cdc.gov/Learning/Training & Education
https://jobs.cdc.gov/External Jobs
https://www.cdc.gov/Vitalsigns/CDC Vital Signs Report
/globalhealth/index.htmlCDC Around the World
https://www.cdc.gov/labsLab Safety
https://go.usa.gov/xyY6zExternal Text duplicate Podcasts
https://www.cdc.gov/library/Library
/about/diversity/diversity.htmDiversity
https://tools.cdc.gov/campaign...External All CDC Newsletters
https://tools.cdc.gov/campaign...External COVID-19
https://www.cdc.gov/mmwr/Morbidity and Mortality Weekly Report
IMG-ALT Morbidity and Mortality Weekly Report Journal
https://wwwnc.cdc.gov/eid/External Emerging Infectious Diseases
IMG-ALT Emerging Infectious Diseases Journal
https://www.cdc.gov/pcd/Preventing Chronic Disease
IMG-ALT Preventing Chronic Disease Journal
/DataStatistics/Text duplicate Data & Statistics
/library/sciclips/issues/Science Clips
https://phil.cdc.gov/External Public Health Image Library
https://stacks.cdc.gov/External CDC Stacks: Publications
https://www.cdc.gov/os/index.htmAdvancing Excellence & Integrity of CDC Science
https://www.cdc.gov/index.htmText duplicate CDC Home
/DiseasesConditions/Diseases & Conditions
/HealthyLiving/Healthy Living
https://wwwnc.cdc.gov/travel/External Travelers' Health
https://emergency.cdc.gov/External Text duplicate Emergency Preparedness
/InjuryViolenceSafety/Text duplicate Injury, Violence & Safety
/Environmental/Text duplicate Environmental Health
https://www.cdc.gov/Workplace/Text duplicate Workplace Safety & Health
https://www.cdc.gov/GlobalHealth/Text duplicate Global Health
/stltpublichealth/index.htmlText duplicate State, Tribal, Local & Territorial
/DataStatistics/Text duplicate Data & Statistics
https://www.cdc.gov/vitalsigns/Text duplicate Vital Signs
/features/archive/Feature Archive
/ToolsResources/Tools & Resources
https://www.cdc.gov/dotw/Disease of the Week
https://www.cdc.gov/publications/Text duplicate Publications
https://www.cdc.gov/mobile/Mobile apps
https://www.cdc.gov/cdctv/CDC – TV
https://jobs.cdc.gov/External Text duplicate Jobs
/cdc-info/index.htmlVisit CDC-INFO
https://wwwn.cdc.gov/dcs/conta...External Email CDC-INFO
/cdc-info/index.htmlOpen 24/7
/about/default.htmText duplicate About CDC
https://jobs.cdc.gov/External Text duplicate Jobs
https://www.cdc.gov/fundingFunding
/Other/policies.htmlPolicies
/other/plugins/index.htmlFile Viewers & Players
/other/privacy.htmlPrivacy
https://www.cdc.gov/od/foiaFOIA
/eeo/nofearact/index.htmNo Fear Act
https://oig.hhs.gov/External OIG
/other/nondiscrimination.htmlNondiscrimination
/contact/accessibility.htmlAccessibility
https://www.facebook.com/CDCNew window External Facebook
https://twitter.com/CDCgovNew window External Twitter
https://www.instagram.com/CDCgov/New window External Instagram
https://www.linkedin.com/compa...New window External LinkedIn
https://www.snapchat.com/add/c...New window External Snapchat
https://www.youtube.com/user/C...New window External Youtube
https://www.cdc.gov/cdctvCDC TV
https://tools.cdc.gov/podcasts...External RSS
https://wwwn.cdc.gov/dcs/Reque...External Email
https://www.hhs.gov/External U.S. Department of Health & Human Services
https://www.usa.gov/External USA.gov
/Other/disclaimer.htmlCDC Website Exit Disclaimer
/other/language-assistance.htmlLANGUAGE ASSISTANCE
/other/language-assistance.htmlAnchor Text duplicate Español
/other/language-assistance.htmlAnchor 繁體中文
/other/language-assistance.htmlAnchor Tiếng Việt
/other/language-assistance.htmlAnchor 한국어
/other/language-assistance.htmlAnchor Tagalog
/other/language-assistance.htmlAnchor Русский
/other/language-assistance.htmlAnchor العربية
/other/language-assistance.htmlAnchor Kreyòl Ayisyen
/other/language-assistance.htmlAnchor Français
/other/language-assistance.htmlAnchor Polski
/other/language-assistance.htmlAnchor Português
/other/language-assistance.htmlAnchor Italiano
/other/language-assistance.htmlAnchor Deutsch
/other/language-assistance.htmlAnchor 日本語
/other/language-assistance.htmlAnchor فارسی
/other/language-assistance.htmlAnchor English
https://api.addthis.com/oexcha...New window External Subdomain Text duplicate Facebook
https://api.addthis.com/oexcha...New window External Subdomain Text duplicate Twitter
https://api.addthis.com/oexcha...New window External Subdomain Text duplicate LinkedIn
https://api.addthis.com/oexcha...New window External Subdomain Text duplicate Email
/Other/disclaimer.htmlWebsite Disclaimers

Server configuration

HTTP redirects
(Critically important)
This website redirects to "https://www.cdc.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This website uses GZip for compressed data transmission.
Performance
(Somewhat important)
This website loads 9 javascript files. This may affect the load time negatively.
The page response time is excellent with 0.03 seconds.
This website only loads 1 CSS files. That's ok.
The file size of the HTML document is fine (153 kB).

HTTP Response Header

NameValue
content-typetext/html
srv3
access-control-allow-origin*
x-ua-compatibleIE=edge
varyAccept-Encoding
content-encodinggzip
content-length44706
dateSat, 24 Oct 2020 02:05:29 GMT
strict-transport-securitymax-age=31536000 ; includeSubDomains ; preload
statuscode200
http_versionHTTP/2

External factors

Blacklists
(Critically important)
This website is not classified "for adult only".
Shallalist classifies this website as Government. This classification is fine.
This website is referenced by wikipedia.
This website has excellent links from other websites.
This website has backlinks from 517,671 referring domains.
This website has 86,515,364 backlinks.
This website has backlinks from 225,623 different ip addresses.
Facebook popularity
(Somewhat important)
This website has social activity like shares, comments or likes on facebook.
Listed on Webwiki
(Nice to have)
This website is listed on Webwiki.

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

# Don't spider search pages
Disallow: /search.do

# Don't spider email-this-page pages
Disallow: /email.do
 
# Don't spider printer-friendly versions of pages
Disallow: /print.do

# 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/niosh/sitemaps/sitemapsNIOSH.xml
Sitemap: https://www.cdc.gov/std/STDsitemap1.xml
Sitemap: https://www.cdc.gov/grand-rounds/sitemap.xml
Sitemap: https://www.cdc.gov/injury/injury-oc-sitemap.xml
Sitemap: https://www.cdc.gov/violenceprevention/NCIPC-ViolencePrevention-SiteMap.xml
Sitemap: https://www.cdc.gov/traumaticbraininjury/NCIPC-TraumaticBrainInjury-SiteMap.xml
Sitemap: https://www.cdc.gov/steadi/NCIPC-STEADI-SiteMap.xml
Sitemap: https://www.cdc.gov/safechild/NCIPC-SafeChild-SiteMap.xml
Sitemap: https://www.cdc.gov/rxawareness/NCIPC-RXawareness-SiteMap.xml
Sitemap: https://www.cdc.gov/parentsarethekey/NCIPC-ParentsAreTheKey-SiteMap.xml
Sitemap: https://www.cdc.gov/parents/essentials/NCIPC-Essentials-SiteMap.xml
Sitemap: https://www.cdc.gov/opioids/NCIPC-OpioidsPortal-SiteMap.xml
Sitemap: https://www.cdc.gov/motorvehiclesafety/NCIPC-MotorVehicleSafety-SiteMap.xml
Sitemap: https://www.cdc.gov/homeandrecreationalsafety/NCIPC-HomeandRec-SiteMap.xml
Sitemap: https://www.cdc.gov/drugoverdose/NCIPC-DrugOverdose-SiteMap.xml
Sitemap: https://www.cdc.gov/coronavirus/sitemap.xml
Sitemap: https://www.cdc.gov/covid-data-tracker/sitemap.txt

Facebook popularity

Shares / Likes / Comments
502,510

Only the data for the given URL is shown. We cannot determine the social actions for a linked fan page.

Search preview

www.cdc.gov
Centers for Disease Control and Prevention
As the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.

Most important keywords

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

KeywordResultRecheck
CDC66%Check
Disease50%Check
protect48%Check
Health48%Check
Disease Control48%Check
threats46%Check
Control46%Check
Centers46%Check
Safety46%Check
People46%Check

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