TUESDAY, Nov. 29, 2022 (HealthDay News) — For health care workers providing care to patients with COVID-19, the risk for COVID-19 does not differ significantly with use of medical masks versus N95 respirators, according to a study published online Nov. 29 in the Annals of Internal Medicine. Mark Loeb, M.D., from McMaster University in Hamilton, Ontario, Canada, and colleagues examined whether medical masks are noninferior to N95 respirators for preventing COVID-19 in health care workers providing routine care in a multicenter trial. Data were included for 1,009 health care workers at 29 health care facilities who provided direct care to...