A disposable mask? Why not a genuine army surplus mask?
N-95 mask filters out tuberculosis and severl other airborne viruses.....it is not a BE all end all, but I sure as hell am gonna wear it around unknown viruses!
It isnt a gas mask, Hon, it is a filtered face mask to wear daily.......
I agree with you that going to MOPP4 is the best solution, but many dont have access to that stuff.......