When the majority of a population is vaccinated against a certain disease, the entire community is resistant to attack by the disease, including those unvaccinated, due to herd immunity. Herd immunity only works when the disease is contained to a single host species, and transmission occurs directly from one member of the host species to the other.
Summary of Vaccination and herd immunity
Evaluation of diagnostic tests
Causation, validity and bias
AssessmentsVaccination and herd immunity
Vaccination and herd immunity
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