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U.S. Food and Drug Administration Commissioner Stephen Hahn says he hopes herd immunity will be reached in 2021 and expects to have most of the elderly and hospital workers vaccinated by the end of the first quarter.
Fuente: Youtube
U.S. Food and Drug Administration Commissioner Stephen Hahn says he hopes herd immunity will be reached in 2021 and expects to have most of the elderly and hospital workers vaccinated by the end of the first quarter.
Fuente: Youtube
