Re: Any indication which OS these hospitals use?
I'm not buying that. Linux and MacOS are quite safe out of the box, but a fresh Windows machine first needs several TB worth of patches before it's even half as safe, mainly because its default settings are "hey, I'm bending over here, come and get me". And Defender doesn't, at least not enough.
What they DO do, immediately, is ship every bit of data they can grab to Microsoft the moment they go live - weirdly, that code always seems to work rather well..