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10-19-2021, 12:54 PM
The F.D.A. may authorize booster shots of vaccines different from the ones that Americans originally received. The science behind the move is promising.
More... (https://www.nytimes.com/2021/10/19/health/covid-vaccine-mix-match.html)
More... (https://www.nytimes.com/2021/10/19/health/covid-vaccine-mix-match.html)