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A member asked:
The polio vaccine injects antigens from the poliovirus into our bodies. why doesn't that make us sick?
2 doctors weighed in across 2 answers
Not live: As you stated, the vaccine has "small portions" of the virus itself, and these portions are not "alive" and cannot replicate or attach and invade cells.
Answered 11/8/2014
3.6k views
Dead=dead: It takes live virus invading your body to make you sick. Injecting non-living antigens just allow your body to build antibodies to those antigens. If exposed to the living virus (that has those antigens)in the future, the antibodies would kill them before they make you sick.That is how most vaccines work.
Answered 5/17/2017
692 views
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