Stumbled upon summary research by highly respected Cochrane Organization on masks. I might be not a specialist, but it looks like conclusion based on magnitude of studies is:
"Masks make little to no difference whether surgical or respirator n95+ types"
Why are we wearing them then? Based on "science says they are helpful"? But, but ... this is extensive research of a lot of scientific studies they say...wait..."NOT EFFECTIVE"? So...why are we wearing them?