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Which characteristic of the influenza virus best explains why there is a different influenza vaccine offered each year

User PureW
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2 Answers

7 votes

Answer:

the virus is constantly mutating each year requiring there to be different vaccines

User Andrey Frolov
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4 votes

Answer: The infuenza Virus mutates often so a new vaccine will be needed to fight the stronger, more adapted version of the virus.

User Jarmund
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