The US has a zillion healthcare providers. Some are so huge and well resourced that they literally have $100 million+ digital record systems. Some are so tiny that it's one doctor operating out of an old house with pen and paper. A fax machine is the least common denominator.

That fax is probably much more secure than the $100m system too...

> In the US also the FAX is still a thing?! Seriously?!

Yep. My current employer, as well as the two prior to this one, all have and use fax machines despite being tech companies. Not because they want to, but because so many other companies out there still require it.

I work for an insurance company that for a long time didn't trust digital signatures. So we accepted docs from our agents via fax. They were there four decades ago, and they're still there (of course they're fax servers). They'll probably be there when I retire.