Funny you say that but I don't see anyone posting your claims saying a zapper has cured them of anything. Ozone iv treatment yeah tons of videos on youtube people being cured from horrible infections.
Zappers? Nope.
In fact with my own experience zapper would not even kill my warts or the tiny boils I get on my hands from jerking off.
Yes male cum has bacteria in it that can infect the skin.