asked 217k views
5 votes
How have vaccines prevented the spread of measles, mumps, polio, tetanus, and hepatitis B?

asked
User Tedtoal
by
8.7k points

1 Answer

2 votes
It helps get people to a point where they’re ‘immune’ it helps the immune system fight them (while the actual virus is dead) so if it ever does enter the immune system it would have already fought it before
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