Biology, asked by jijipaulbinoy, 9 months ago

Vaccines fails very rarely .what is the reason??

Grade 8

Answers

Answered by sara8952

1

Answer:

there are two main reasons.

1 failure of the vaccine delivery system

2 failure of the immune response

Answered by aawaara

0

Explanation:

good quality

research done in all aspects

tasted for long time

experimented on animals

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