aleydachucxo aleydachucxo

07-06-2021
Biology

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Why do we have to get the flu shot every year ?

Respuesta :

harsimransimran188 harsimransimran188

07-06-2021

Answer:

Because flu viruses evolve so quickly, last year's vaccine may not protect you from this year's viruses. New flu vaccines are released every year to keep up with rapidly adapting flu viruses.

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