J.&J. booster works well for people who had Pfizer originally, study finds.


By BY CARL ZIMMER
Health
https://ift.tt/3GdCzMf
A small study in Boston looked at mixing and matching with the third shot.
New York Times
Vaccination and Immunization, Coronavirus (2019-nCoV)
December 5, 2021 at 10:55PM

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