Study suggests that routine face mask use by 50% or more of the population reduced COVID19 spread to an R of less than 1.0. Other studies have generated similar estimates. More widespread masking with higher quality masks could help mitigate a second wave.

Study suggests that routine face mask use by 50% or more of the population reduced COVID19 spread to an R of less than 1.0. Other studies have generated similar estimates. More widespread masking with higher quality masks could help mitigate a second wave. https://t.co/tIqQJfXNV8

— Scott Gottlieb, MD (@ScottGottliebMD) June 10, 2020