COVID-19 — United States
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. If this hypothesis is borne out, universal masking could become a form of “variolation” that would generate immunity and thereby slow the spread of the virus in the United States and elsewhere, as we await a vaccine.
One important reason
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