I was reading a scientific paper on the efficiency of face masks based on a meta-study of other papers. My perosnal conclusion was a lot more uncertain than the

I was reading a scientific paper on the efficiency of face masks based on a meta-study of other papers. My perosnal conclusion was a lot more uncertain than the conclusion that the paper came to. Most of the evidence came from n95 respirators in hospital settings, while the "normal" medical mask evidence was a lot weaker. Yet their conclusion was to advise mask use for the general public (which is gong to be the normal masks, or cloth masks in the majority of cases) based mainly on n95 evidence.