What I'm Seeing Now
If you find yourself in a hospital get the hell out as fast as you can. I wanted to fill in the blanks more, but I'll just leave it at that. Keep your hands clean and avoid highly populated and/or crowded areas. American health care isn't as good as it could be...
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Operating rooms are supposed to be positive pressure as one of the measures to keep bacteria out of the room and surgical site. The airflow in an operating room is complicated. Some out there think making the room negative protects everybody but the person being operating on. They're knowledge and priorities should both be questioned. Note - I've not seen a lot of this second problem.
I've seen bureaucrats making technical decisions. That's when you see things like brand new 737s crashing and space shuttles blowing up on the launch...
Are you saying that the same systems are being used for negative pressure and that is making delivery of oxygen to critical patients even worse?
Please excuse my lack of even rudimentary knowledge on this topic as I am a neophyte in this area.
As I type this I can overhear the news on the tv (my wife likes to leave that garbage on) saying that very close to home here they are going to start fining people who don't wear face coverings. Can't help but chuckle...
I've been in agreement with your statement on hospitals for years, but I sense you have more current data to share.