Don’t know. All I know is UVC light doesn’t penetrate like the Other UV. So the amount of UVC making it through the atmosphere is relatively small.
IIRC, it is shorter wave length and also isn’t big on penetration of skin. Still there’s warnings that come with UVC lights not to be in the room. Also, experts have talked about placing the UVC lights high up to avoid impact on humans.
That’s all I’ve heard about it.
Another one to look at is the crowd dispersal weapon the military (DARPA) developed.
It too uses EM waves. Are those specs NATSEC?
Where do those waves fall on the spectrum vis-a-vis 5G and FAR-UVC?
Again, is there a nexus?