angelinabologna07
angelinabologna07 angelinabologna07
  • 21-01-2021
  • Chemistry
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why does a new flu shot need to be made each year ?

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yaneitorres
yaneitorres yaneitorres
  • 21-01-2021

because we could be sick if don't get the shot there is a higher chance to have the flu

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randacent
randacent randacent
  • 21-01-2021
the flu virus constantly mutates itself to try and make itself immune so it could keep attacking. the human body’s immune system also slowly declines over time.

i hope this helps you!
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