Masks for Prevention of Respiratory Virus Infections, Including SARS-CoV-2, in Health Care and Community Settings: A Living Rapid Review

Review (39 studies;n=33 867) notes evidence is stronger in health care than community settings and N95 respirators might reduce SARS-CoV-1 risk vs. surgical masks in health care settings, but applicability to SARS-CoV-2 is uncertain as only 2 observational studies were identified

Annals of Internal Medicine