I was an early mask adopter — & they make intuitive sense — but a growing body of evidence shows that mask mandates don't appear to make much difference at the community level. pic.twitter.com/wnfBUKcZuM

— Liz Highleyman (@LizHighleyman) April 13, 2022

I suspect masking worked better against prior variants, but not so well against Omicron. At most a very marginal difference with 100% compliance. Otherwise, probably didn’t matter much.