That may be, healthcare workers are required to wear masks approved by the CDC, and not Hoover or Dyson.
They are desperate enough in some hospitals to be wearing plastic garbage bags and bandanas.
But I get your point.
My design is for folks to be able to make an N-95 equivalent mask at home without a sewing machine.
I just came across a relevant article:
The untold origin story of the N95 mask
The most important design object of our time was more than a century in the making.