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2 votes
A primary reason for needing a new vaccine for influenza each year is that _____.

2 Answers

2 votes

Answer: It reduces flu illness, missed work/schoolwork

Explanation: Getting a flu shot does not PREVENT, but REDUCES your chance of getting the flu.

User Jose Seie
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2 votes
Viruses change. They can become stronger.
User Mcobrien
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