https://makezine.com/2020/03/22/whats-plan-c-for-covid-19/
I read an article yesterday about a vacuum cleaner manufacturer that was contacted by the gov't somewhere. At first they thought it was a joke but it turned out to be legit. They don't know much about medicine but they know air flow real good. So they are trying to prototype a respirator, to specs, that can be made with commonly available parts almost anywhere in the world.
Maybe they will come up with something.
Worth a read
Ventilators 101: What They Do And How They Work | Hackaday
https://hackaday.com/2020/03/25/ventilators-101-what-they-do-and-how-they-work/