Excerpt:
Reported use of cloth face covering or mask 14 days before illness onset
Never 6 (3.9%)
Rarely 6 (3.9%)
Sometimes 11 (7.2%)
Often 22 (14.4%)
Always 108 (70.6%)
Original source: https://www.cdc.gov/mmwr/volumes/69/wr/pdfs/mm6936a5-H.pdf
