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JuliiiDj0uliamgirl JuliiiDj0uliamgirl
  • 07-11-2016
  • Health
Answered

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

Verified Answer :

hiimruma
hiimruma hiimruma
  • 07-11-2016

I believe the answer is because we become immune to the one before so it wont work like last time

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