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Free_Kalibri [48]
3 years ago
5

A student recieved a flu shot in the fall. During the flu season the student caught a cold. The most likely reason the vaccine h

e recieved did not prevent the cold was that
Biology
1 answer:
ANTONII [103]3 years ago
7 0
The vaccine was made in the past year, and the flu virus has mutated and grown resistant to this year's flu vaccine
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