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Attack rate is: A. number of persons who ate a specific food and became ill total number of persons who ate the specific food B.total

Attack rate is:

A.number of persons who ate a

specific food and became ill

total number of persons who

ate the specific food

B.total number of persons who

ate a specific food

number of persons who

did not become ill

C.is used in outbreak investigations to compare risk of disease in groups with different exposures

D.same as secular trend

E.both A and C

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