A vaccine can halt an infection in a population in which most everyone is vaccinated, due to
A) herd immunity.
B) people keeping away from each other.
C) an epidemic of autoimmunity.
D) bovine immunity.

Question

Quizplus · Accepted Answer

Herd immunity occurs when a high percentage of a population is immune to a disease, either through vaccination or previous infection. This makes it difficult for the disease to spread, even among individuals who are not immune. Therefore, a vaccine can halt an infection in a population with high levels of vaccination due to herd immunity. B, C, and D are not correct choices as they are not relevant to the concept of herd immunity.

A Vaccine Can Halt an Infection in a Population in Which