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No, it didn't. That's "sterilizing immunity", which is a feature of some but not all vaccines. Flu shots, for example, have never given full immunity to the flu, but they've always been vaccines.

In fact, some forms of the polio vaccine can give you polio. https://www.cdc.gov/vaccines/vpd/polio/hcp/vaccine-derived-p...



Those can give people around you polio while you remain immune.


If you're shedding active virus, you're infected with polio, even if it's an asymptomatic infection.




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