Coronavirus: Mask-wearing cuts Covid incidence by 53%, says global study | Coronavirus | The Guardian

An apology.
I was wrong to tweet about the Guardian article, based on weak data, claiming a 53% reduction of infection from mask wearing.
It was wrong because, in overstating the case, it undermined the argument (acknowledged by the critics) that masks do make a difference.

— Stephen Reicher (@ReicherStephen) November 19, 2021