Birdwatch Note Rating
2021-09-24 03:34:24 UTC - HELPFUL
Rated by Participant: 50422F53522DBF842F3096AA9444C9C45C6B09BCA87962C72474DFEE3F997660
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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