Birdwatch Note Rating
2021-09-23 22:12:56 UTC - HELPFUL
Rated by Participant: D04D599B20D1EA34E2FC17710310193597B344E8B57727A38FA311700FAB4AA5
Participant Details
Original Note:
It was tested through a rigorous scientific trial of multiple phases. Efficacy for prevention of transmission, severe disease / death were evaluated in those phases. https://www.cdc.gov/vaccines/basics/test-approve.html The "success rate" of the vaccine since trials has not been measured using people with prior infections.
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