Why should you get a new influenza vaccine every year? a. it wears off fast b. the viruses change rapidly c. you need a booster to keep the immune level up d. none of the above are correct

Why should you get a new influenza vaccine every year?
a. it wears off fast
b. the viruses change rapidly
c. you need a booster to keep the immune level up
d. none of the above are correct
by

1 Answer

Answer :

b. the viruses change rapidly
by

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