A vaccine can halt an infection in a population if 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 is the phenomenon in which vaccination of a significant portion of a population prevents the spread of a disease to those who are not vaccinated. This is because the vaccinated individuals act as a barrier against the disease, making it difficult for it to spread through the population.

A Vaccine Can Halt an Infection in a Population If