Masks reduce the risk of transmission a lot that is pretty clear as far as I know but * Are they used correctly by the majority? * Are the situations where ma

Masks reduce the risk of transmission a lot that is pretty clear as far as I know but * Are they used correctly by the majority? * Are the situations where masks are/were used actually the main contributors to infections overall? * How well do masks work in situations with long time of contact and wearing (public transport, on the job site, ...)? * + Probably a lot of other questions So it can very well be that the impact of masks overall and in comparison with other measures is lower than controlled experiments suggest. If that's the case it does not mean wearing a mask is a bad idea but knowing this could influence decisions on mandating doing it.