Herd immunity refers to the protection of an entire community against an infectious disease due to high enough immunization rates within that community. This means that not only are immunized individuals protected, but unimmunized individuals are also less likely to contract the disease because the overall spread of the disease is limited. Therefore, choice E is the best answer.

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Herd Immunity

Question 34

Multiple Choice

Herd immunity

A) applies to infectious diseases of animals that can affect humans.
B) states that only immunised people are protected.
C) implies that immunised people can pass on their immunity to close contacts.
D) states that the larger the group the more difficult it is to achieve full immunisation.
E) states that high immunisation rates also protect the unimmunised.

Correct Answer: