I'll bet it isn'tThere are different types of UV light.
Regular UV light can damage skin cells and cause cancer.
Another type called Far-UVC light has been shown to destroy bacteria and viruses without damaging the cells in body tissue.
This could be what Trump was talking about.
Also, its safe(ish) for use on human skin as it doesn't penetrate the dead outer layer of your skin. Guess what happens if you stick the glow stick of death inside the body. You'd irradiate any tissue it hits and do nothing else at all.
