Which indicates virulence of an infectious agent?
A) Immune response in the host
B) Ability to produce serious disease in the host
C) Power to invade and infect large numbers of people
D) Ability to produce disease in those infected with the agent
Ans: B
Virulence is the ability to produce serious disease in the host. Antigenicity is an immune response in the host. Infectivity is the power to invade and infect large numbers of people. Pathogenicity is the ability to produce disease in those infected with the agent.
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