One of the biggest things I have to wonder about the disposable masks is how do they react to sweat. Graphene might be less harmful than the fungus/bacteria which you'd find on reusable masks, assuming you have to wear them at the gym.
I think that's the point. I might have had the WuFlu and not noticed, I had something which effected my breathing last April and didn't really care.
Doing high intensity exercises at the gym with a recent mask "mandate", felt like smoking a pack of cigarettes, and I actually felt notable soreness for the first time in years.
Even in Afghanistan only the women are wearing their muzzles.