I mean, if you're infected and cough its a physical barrier of sorts... it will reduce the amount of droplets in the air and def reduce sputum expelling. If yo

I mean, if you're infected and cough its a physical barrier of sorts... it will reduce the amount of droplets in the air and def reduce sputum expelling. If you're not infected it'll help stop you touching your mouth and nose at the very least. These are not air filtration protections as such but they're def better than "no protection" and in their own way will help reduce the curve...