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maw [93]
3 years ago
7

I neeed please ASAP

Biology
2 answers:
adoni [48]3 years ago
8 0

Answer:

option C

The immune system has been exposed to the polio virus so that the body responds rapidly to infections

Bad White [126]3 years ago
5 0

Answer:

Option C

Explanation:

A vaccine is usually given to boost up the immune system by making them familiar with the virus

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