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herd immunity

Syllabification: herd im·mu·ni·ty

Definition of herd immunity in English:

noun

General immunity to a pathogen in a population based on the acquired immunity to it by a high proportion of members over time.
Example sentences
  • The goal of measles control is to raise population immunity above herd immunity threshold and eventually to interrupt indigenous virus transmission.
  • The goal is herd immunity, where the proportion of people susceptible to infection in a physically interacting population is so low that transmission of infection is unlikely.
  • As adolescents are the only group in which carriage rates have been studied, these data provide more robust evidence of herd immunity across the whole population.

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