I think a review of the relevant literature shows that it quite obviously is, but I’m about to go to sleep and don’t want to fight that battle thus why I’m trying to direct your attention to the actual point.

So let’s try again:

If you take it as a given that SARS-2 primarily spreads via aerosols, what does that imply about the efficacy of strapping a warm, damp piece of cloth over your breathing holes?