Corona-immunitas.ch - SEO Checker

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Overview of the SEO Check
Meta information
73% 
Page quality
72% 
Page structure
79% 
Link structure
90% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.13 s
File size
35.40 kB
Words
379
Media files
21
Number of links
36 internal / 9 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Corona Immunitas
The page title is too short. (165 pixels of 580 max pixel length) Optimize title
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)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: de
Language defined in HTML: de
Server location: United States of America
The following language is defined by HTML: de
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 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
langde
charsetUTF-8

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Page quality

Content
(Critically important)
There are only 379 words on this page. Good pages should have about 800 words of useful content.
36.9% 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.
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 13.06 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
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 8 tags for this page.
Image SEO
(Somewhat important)
6 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
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
/media/pshb4ynb/logo_corona_immunitas.svgCorona Immunitas Logo
...th=400&height=180&rnd=132489773118830000Ph Navigationsbild@2X
...th=400&height=180&rnd=132507032699530000Bilder Cc
/_img/icons/graphic_1.svgBackground Icon 1
/_img/icons/graphic_2.svgBackground Icon 2
/_img/icons/graphic_3.svgBackground Icon 3
...th=600&height=600&rnd=132751303503370000No alt attribute provided
/_img/icons/graphic_1.svgBackground Icon 1
/_img/icons/graphic_2.svgBackground Icon 2
/_img/icons/graphic_3.svgBackground Icon 3
...th=600&height=600&rnd=132491466257230000No alt attribute provided
/media/fiyb4umb/icon_1.svgicon
/media/2cvlp0oi/icon_2.svgicon
/media/mujjwlbs/icon_studienuebersicht.svgicon
/media/502b43eo/icon_impfung.svgicon
/_img/icons/icon_sciencein1min.svgScience in a minute
/_img/icons/icon_in_1.svgNo alt attribute provided
/_img/icons/icon_fb_1.svgNo alt attribute provided
/_img/icons/icon_twitter_1.svgNo alt attribute provided
/_img/icons/icon_youtube_1.svgNo alt attribute provided
Video URLWidthHeight
https://www.youtube.com/embed/0g0VaTci2JU

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 Fast Response Unit Phase 6 abgeschlossen
H2 Was ist Corona Immunitas?
H2 Science in a Minute
H3 Bisherige Ergebnisse der Zürcher Coronavirus Impfstudie
H3 Bisherige Ergebnisse der Zürcher Coronavirus Kohortenstudie
H3 Zahlen und Fakten zu den Studien
H3 Newsletter abonnieren
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
2 links don't have an anchor text.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are 9 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.corona-immunitas.ch/IMG-ALT Corona Immunitas Logo
/aktuell/Aktuell
/programm/startschuss/Startschuss
/programm/forschungsprogramm/Forschungsprogramm
/programm/resultate/Resultate
/programm/phasen/Phasen
/programm/antikorpertest/Antikörpertest
/programm/getestete-population/Getestete Population
/programm/studien/Studien
/programm/review/Review
/support/Support
/medien/medienberichte/Medienberichte
/medien/medienkit/Medienkit
https://ssphplus.ch/New window External Zur SSPH+
/en/EN
/fr/FR
/it/IT
/programm/resultate/Zu den Resultaten
/programm/resultate/No Text
/programm/forschungsprogramm/Text duplicate Forschungsprogramm
/programm/forschungsprogramm/No Text
/aktuell/bisherige-ergebnisse-...Bisherige Ergebnisse der Zürcher Coronavirus Impfstudie Mehr lesen
/aktuell/bisherige-ergebnisse-...Bisherige Ergebnisse der Zürcher Coronavirus Kohortenstudie Mehr lesen
/programm/getestete-population/Testpersonen Über 50’000 Frauen, Männer und Kinder lassen sich mit Überzeugung und Engagement freiwillig auf Antikörper testen.
IMG-ALT icon
/support/Unterstützer Namhafte Politiker/innen und Schweizer Firmen nehmen ihre gesellschaftliche Verantwortung wahr.
IMG-ALT icon
/programm/studien/page-compone...Studienübersicht Mit 40 Einzelstudien gehen 14 Schweizer Hochschulen und Gesundheitsorganisationen der Ausbreitung von COVID-19 auf den Grund.
IMG-ALT icon
https://www.bag.admin.ch/bag/d...New window External Subdomain Corona-Impfung Für alle Fragen zur Corona-Impfung stehen das Bundesamt für Gesundheit (BAG) und die Eidgenössische Kommission für Impffragen (EKIF) zur Verfü...
IMG-ALT icon
https://www.facebook.com/share...New window External Subdomain No Text
http://twitter.com/share?url=h...New window External No Text
https://www.linkedin.com/compa...New window External Subdomain No Text
https://www.facebook.com/Coron...New window External Subdomain No Text
https://twitter.com/CoronaImmu...New window External No Text
https://www.youtube.com/channe...New window External Subdomain No Text
/formular-kontaktaufnahme/Formular Kontaktaufnahme
/programm/forschungsprogramm/Was ist Corona Immunitas?
/programm/antikorpertest/Was ist ein Antikörper-Test?
/programm/phasen/Warum wird in 5 Phasen getestet?
/faces/Wer sind die Gesichter hinter Corona Immunitas?
/programm/review/Text duplicate Review
/programm/getestete-population/Text duplicate Getestete Population
/publikationen/Publikationen
https://www.youtube.com/channe...New window External Subdomain Science in a minute
/impressum/Impressum
/datenschutz/Datenschutz
/datenschutz/New window Zur Datenschutzerklärung »

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.corona-immunitas.ch/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.13 seconds.
The file size of the HTML document is fine (35 kB).

HTTP Response Header

NameValue
cache-controlprivate
content-typetext/html; charset=utf-8
content-encodinggzip
varyAccept-Encoding
set-cookie77 Characters
dateFri, 12 Jun 2026 08:43:11 GMT
content-length9365
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 39 referring domains.
This page has 128 backlinks.
This page has backlinks from 37 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

User-agent: *
Disallow: /bin/
Disallow: /config/
Disallow: /install/
Disallow: /umbraco/
Disallow: /views/

Sitemap: https://www.corona-immunitas.ch/sitemap-xml/

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Search preview

www.corona-immunitas.ch
Corona Immunitas

Most important keywords

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

KeywordResultRecheck
Corona70%Check
Immunitas70%Check
Corona Immunitas70%Check
Response Unit56%Check
Science47%Check
Bisherige47%Check
Ergebnisse47%Check
Zürcher47%Check
Coronavirus47%Check
Bisherige Ergebnisse47%Check
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