So, I have a construction N95-type mask: its vent/valve/whatever is dead center right on the front. If we're talking about droplets/aerosols mostly, it seems directionality would be a pretty big factor, so it's actually somewhat plausible that the bandana could be relatively effective despite nonexistent fit.
It seems like we could/should have had pretty reasonably authoritative information about this kind of thing from public health services by now, though.
It seems like we could/should have had pretty reasonably authoritative information about this kind of thing from public health services by now, though.