You don’t need to have a high standard of proof to mandate masks because mandating masks doesn’t have high costs to society.

To the doofuses comparing masks to mandating hijabs:

RFRA exists. If you think a law limits your religious liberty, you have a strong chance of winning a religious exemption.

And to the folks like IT IS REQUIRING SONETHING TO ME PLACED ON MAH BODY um seatbelt laws exist? So do anti-nudity laws? The government routinely compels that people wear things for reasons of public safety, or even merely public decency!

And for the selfish ingrates who have absolutely no interest in creating any kind of functional culture, ie the people responding “well but you just don’t know how masks make me FEEL” I say... well actually I said it already dang I didn’t mean to