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myrzilka [38]
3 years ago
12

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

Health
1 answer:
sukhopar [10]3 years ago
3 0
I believe the answer is because we become immune to the one before so it wont work like last time
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Answer: The rigth answer is: A. Severe swelling and redness at a midshaft femur

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