File:Herd immunity Tamil Fin Plain.svg

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English: When a critical portion of a community is immunized against a contagious disease, most members of the community are protected against that disease. This is known as "community (or 'herd') immunity." The principle of community immunity applies to control of a variety of contagious diseases, including influenza, measles, mumps, rotavirus, and pneumococcal disease.

The top box depicts a community in which no one is immunized and an outbreak occurs. In the middle box, some of the population is immunized but not enough to confer community immunity. In the bottom box, a critical portion of the population is immunized, protecting most community members.

 
not immunized, healthy
 
immunized, healthy
 
not immunized, sick
Based on an illustration by the National Institute of Allergy and Infectious Diseases (NIAID) originally uploaded as Community Immunity.jpg
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Source File:Herd_immunity.svg
Author https://commons.wikimedia.org/wiki/User:Tkarcher

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Date/TimeThumbnailDimensionsUserComment
current09:56, 3 August 2021Thumbnail for version as of 09:56, 3 August 2021803 × 962 (401 KB)PJeganathan (talk | contribs)edges corrected
09:30, 3 August 2021Thumbnail for version as of 09:30, 3 August 2021784 × 962 (402 KB)PJeganathan (talk | contribs)adding inkscapesvg
09:14, 3 August 2021Thumbnail for version as of 09:14, 3 August 2021784 × 962 (401 KB)PJeganathan (talk | contribs)corrected the edges
09:08, 3 August 2021Thumbnail for version as of 09:08, 3 August 2021784 × 962 (401 KB)PJeganathan (talk | contribs)Uploaded a work by https://commons.wikimedia.org/wiki/User:Tkarcher from https://commons.wikimedia.org/wiki/File:Herd_immunity.svg with UploadWizard

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