Effectiveness of Surgical and Cotton Masks in Blocking SARS–CoV-2: A Controlled Comparison in 4 Patients
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DOI: 10.7326/m20-1342
Abstract: Background: During respiratory viral infection, face masks are thought to prevent transmission (1). Whether face masks worn by patients with coronavirus disease 2019 (COVID) prevent contamination of the environment is uncertain (2, 3). A previous… read more here.
Keywords: cotton masks; effectiveness surgical; surgical cotton; surgical masks ... See more keywords