The CDC is promoting a new study on the effectiveness of masks, but you have to read the fine print. Literally:
A new @CDCMMWR study shows that people who reported always wearing masks or respirators in indoor public settings in California were less likely to test positive for #COVID19 compared with those who reported not wearing a face covering. Learn more. https://t.co/T8gaqiPHyI pic.twitter.com/6UJ9cs60NK
— CDC (@CDCgov) February 4, 2022
