And to what extent?
An exceptional systematic analysis of 172 global studies in ~26,000 people (not randomized trials)
—Physical distancing > 1 m; & more the better
—Masks (N95 > surgical/cotton)
—Eye protection
thelancet.com/journals/lance… @TheLancet
@KirbyInstitute's MacIntyre and Wang @UNSW
+ coverage @nytimes by @apoorva_nyc nytimes.com/2020/06/01/hea…