I doubt our medical personal have been using the low grade MADE IN CHINA masks the public received. EVERY package of masks I checked in stores was from China, and I previously posted a recall notice from Canada pulling those masks off the market because they contained chemicals (graphene oxide) which cause lung damage.
Now.that is a valid point. I would never put a mask made in China on my face. I ordered only surgical grade made in the USA masks for air.travel the rest of the time I had virus rated P100 masks with replaceable filters that were of Israeli origin. The dang TSA won’t let you wear a P100 with an exit valve which actually protects the user that alone tells you what the TSA is all about. I just wore my P100 under the face diaper and they were happy. It did exactly zero for me but it was a nice security blanket for the Karen’s and their TSA daddy