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Rudiy27
3 years ago
7

Why do you think that some vaccines, such as the flu vaccine, need to be given every year?

Biology
2 answers:
iren2701 [21]3 years ago
7 0

Answer:

Because the virus/sickness would evolve and that vaccine might not protect you.

DochEvi [55]3 years ago
5 0

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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