General immunity to a pathogen in a population based on the acquired immunity to it by a high proportion of members over time.
More 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.