It doesn't stop the virus. It doesn't stop the spread. It is reported to reduce the severity of symptoms.

You literally only get it for yourself.
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RT @NBAonTNT
"First of all, you don't get the vaccine for yourself. You get it for other people."

Chuck weighs in on Kyrie Irving's situation with the Brooklyn Nets. #NBAonTNT
https://twitter.com/NBAonTNT/status/1450626417071308800