afaik they use it to desinfect the room after or before usage, not during

I'm intrigued. Didn't know places were trying this idea somewhat "at scale." Do you know if they have any findings from where this was deployed?

It's widely used in hospitals. They also use moving robots which enter rooms and shine UV light in them.

https://www.youtube.com/watch?v=JTFH9X2YIoY

That is awesome! I'm definitely interested to know if they have evidence showing that this leads to better outcomes.