What you're not hearing about wearing masks to stop Covid-19
The same statistics that prove lockdowns didn't work also prove that masks do.
Update to Strategic View
State-level polling data on masking shows that it didn't lower caseloads in the summer when masks were scarce and experts were divided. But in the winter when experts were agreed and masks became available, higher levels of masking were significantly correlated with controlling case growth. Masking appears to be as effective at curbing the spread of the virus as running the New York City subways was in promoting the spread.