Twetchdat! The masks were 0.5 percent effective in the fir…
Twetchdat!
The masks were 0.5 percent effective in the first 20 days of the mandates and less than 2 percent effective after 100 days.
https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm
Twetchdat!
The masks were 0.5 percent effective in the first 20 days of the mandates and less than 2 percent effective after 100 days.
https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm