Non-medical face coverings include reusable cloth masks, bandanas and scarves, and are used in the same way as a surgical mask, to protect you against large particles and respiratory droplets.

RT-PCR–confirmed COVID-19 occurred in 52/497 and 47/507 participants in the medical mask group versus the N95 respirator group (10.46% vs. 9.27%), with HR equal to 1.14.