Herd immunity is greatly increased with a large-scale immunization program. When a large percentage of a population becomes immune to a disease, it becomes difficult for the disease to spread from person to person, thus providing indirect protection (herd immunity) to those who are not immune or cannot get vaccinated. This can effectively stop the spread of epidemics.

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Herd Immunity

Question 47

Multiple Choice

Herd immunity

A) allows epidemiologists to predict when an epidemic will occur
B) should be low in order to achieve maximum protection
C) only applies to zoonoses that involve cattle
D) is greatly increased with a large-scale immunization program

Correct Answer: