Key term for AQA GCSE Biology, used in Communicable Diseases.
When a large proportion of a population is immune to a disease (usually via vaccination), significantly reducing the pathogen's spread and protecting non-immune individuals.
Herd immunity appears in AQA GCSE Biology revision content for Infection and Response, especially Communicable Diseases and Viral Diseases.
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Infection and Response
Communicable Diseases • Vaccination
