When a subpopulation of unvaccinated individuals are protected against a pathogen because the vast majority of individuals in the overall population are vaccinated,this is called _____.

Question

Quizplus · Accepted Answer

Herd immunity occurs when a sufficient portion of a population is immune to a pathogen either through vaccination or previous infection, which indirectly protects the unvaccinated or susceptible individuals from getting infected due to a reduced likelihood of the pathogen spreading.

When a Subpopulation of Unvaccinated Individuals Are Protected Against a Pathogen