We've asked that the Bangladesh mask study either be corrected or withdrawn
The study showed nothing. If there was any protection at all, it was too small to measure in the study that was done. The authors need to do the right thing and correct or retract the study ASAP.
Just for the public record, I sent this email today to Yale economics professor Jason Abaluck, the corresponding author of the Bangladesh mask study paper.
I will let you know if he responds. That would be the ethical thing to do.