Immunity is a characteristic of the:
a. agent factor.
b. host factor.
c. environmental factor.
d. epidemiologic triad.
ANS: B
Immunity refers to species-determined resistance to an infectious agent and is determined by the characteristics of the host. The agent is the infection that is causing the infection/disease. Envi-ronmental factors may influence the susceptibility of the host. The epidemiologic triad involves the interaction of the host, agent, and environment.
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