Yes, far UVC, 222 nm, won't penetrate your skin far enough to get to living cells and can be used around humans safely. It's a new technology, though, and not widely deployed.

Also light has very complex interactions with various of our biological symptoms, and I personally would be wary of unintended consequences without long term testing. e.g. it could interfere with sleep, or have other subtle effects

I was imagining some kind of doorway device - but yeah, that's a really interesting approach.

Again, what is safe .. but it the infrastructure is there ...