We need to end this craziness.  If our God or whatever higher power you belive in saw fit to block our noses and mouths I think He or nature would have designed us and all living creatures that way.   Again, it should be about CHOICE.  If you feel safe with one or two, please by all means do.  But don't expect others to sit eight hours a day with their mouths and noses covered worsening their anxiety levels.