Biology, asked by manishdishap9zl1n, 1 year ago

how do vaccines work

Answers

Answered by YASH3100
10
HEYA!!!


HERE IS YOUR ANSWER,


> Vaccines teach the immune system by mimicking a natural infection.

> For example, the yellow fever vaccine contains a weakened form of the virus that doesn’t cause disease or reproduce very well.

> Human macrophages can’t tell that the vaccine viruses are weakened, so they engulf the viruses as if they were dangerous.


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