Turns out, cloth masks are barely effective (2% reduction in case growth after 100 days!). They should have kept their original stance. https://www.cdc.gov/mmw

Turns out, cloth masks are barely effective (2% reduction in case growth after 100 days!). They should have kept their original stance. https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm