When immunization levels in a population are high, provides protection from infection for at-risk persons who cannot be immunized.
A) contact immunity
B) herd immunity
C) active immunization
D) variolation
E) adjuvant therapy

Question

Quizplus · Accepted Answer

Herd immunity is the indirect protection of a population from an infectious disease that occurs when a large percentage of the population has become immune to the disease, either through vaccination or prior exposure.

When Immunization Levels in a Population Are High, Provides Protection