Face Masks Could Be a Crude 'Vaccine' for COVID-19

Face Masks Could Be a Crude 'Vaccine' for COVID-19
(AP Photo/Martin Meissner)

As SARS-CoV-2 continues its global spread, it's possible that one of the pillars of Covid-19 pandemic control — universal facial masking — might help reduce the severity of disease and ensure that a greater proportion of new infections are asymptomatic.

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