nothing is zero-cost but wearing a mask in public is as near to zero as any practical cost can be. Costco had a sale a few weeks ago, 250 masks for 5 bucks, or you can buy a re-usable one and wear it for months.

as far as the "human cost" of wearing a mask... grow up. Asian societies like China/Japan/Korea have been wearing masks forever and they're fine. Now that the consequences of spread are more severe (vs just plain old flu) it's time for this custom to spread more widely.

again, the hilarious thing is it's always adults who are so childish about this whole thing. Kids intuitively get it, just like they grasp a lot of the boomer issues that society is burying its head about.

It's so ironic that in modern society, the children are adults and the adults are childish.