Harvard Medical School's Dr. Abraar Karan says the US can end the Covid-19 pandemic in four weeks if everyone wears N95 masks.
January 23, 2021 at 07:05AM https://ift.tt/2YeUq1g Medical School's Dr. Abraar Karan says the US can end the Covid-19 pandemic in four weeks if everyone wears N95 masks.
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