Are masks effective against coronavirus?

Most Validated
Apr 10, 20

A trial of hospitals in Ontario, Canada found no significant difference in levels of protection provided by surgical vs N95 masks

A randomised trial of 446 nurses in the emergency departments, and medical and paediatric units of 8 tertiary care Ontario hospitals found that the incidence of laboratory-confirmed influenza was similar in nurses wearing the surgical mask and those wearing the N95 respirator.