I believe if you put a mask on a walk in the fresh air is good for you. the exercise will boost you mentally, and physically. the sunshine helps, the fresh air helps and the exercise helps. chances are you probably may not even need a mask but if it makes you feel better wear it. stay inside seems to be worse for you then the alternative, so go outside and walk. do a 20 minute walk. it's free...it will be good for your brain, spirit and body...and as my mother used to say "it will blow the stink off of you"