Wear a mask for the exact same reason hospital staff does.
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Yep....
I used to paint quite a lot .... homes.
Last week I ran across a nice, nearly full box of masks we used to use on the job ---
SAF-T-FIT by WILLSON N95.
I'm going to use them as you say. Feeling a little vulnerable these days.
Better take my MAGA hat off when I go to the store.
***
Take care of yourself and your family. I think of you each day when I look at that old Dale Long baseball bat over in the corner.
:-)