“Herd Immunity”: A Rough Guide (Clinical Infectious Diseases, January
Herd immunity is what happens when a high level of people in the community are vaccine against a pathogen. If 97% of the population is vaccinated in order to protect themselves and the few who cannot medically be vaccinated – a barrier is built within the community which protects against illness.
vaccineswork: “How vaccines work for a communityEver wondered why people talk about immunisation as being important for a community, as well as for an individual? The effect in question is called herd.