Exactly this. Parent to your comment has no firm grasp on how difficult and expensive it is to place and maintain a melt-blown-fiber shop outside of a crisis, l

Exactly this. Parent to your comment has no firm grasp on how difficult and expensive it is to place and maintain a melt-blown-fiber shop outside of a crisis, let alone during one. That said : cotton DIY masks can be quite effective. I recommend buying a box of shop towels, which are made with a similar blowing mechanism that creates a random fiber orientation.