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Microorganisms and Disease

Q1: The influenza vaccine is administered each year because

A mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines

B it is a polysaccharide vaccine that does not confer long-term protection

C the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time

D none of the above

ANS:A - mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines

No answer description is available.



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