During WWII, I was a telegraphist in the New Zealand Navy. The radio waves were directed into our metal room, on a metal ship, where we did Morse code for hours on end. A lot of us got sick. I got pneumonia and the mumps, and many others got serious flu. Most interesting, we recognized that the Navy telegraph operators were prone to psychological problems— some anger and strange behavior in normally mild-mannered men. So if radio waves have this effect, imagine what 5G can do!