so you stop some droplets with a mask (the ones that don’t go above below or out the sides). You do the same by covering your cough or sneeze. Think about those cloth masks everyone is wearing. unless they are discarded or washed after every use they are breeding grounds of disease living in your pocket or on your dashboard or in your purse. They are almost never worn or fit correctly. They induce the wearer to touch their face more not less. They probably spread more disease than they prevent
I still continue to question face mask effectiveness. Our county had a recent big outbreak at a meat packing plant. By the time the outbreak happened, this was a well known problem in the industry. Just the other day an assisted living center got hit with 7 cases.