I spent 20 years working around UHF radio systems and a 2G network. Apart from the odd RF burn on the fingers (don’t key up a radio with a finger over the end of the open antenna lead……..) I seem to have suffered no ill health. Some of my colleagues have spent the best part of 40 years working on anything from very high power broad band jammers for the RAF(Vulcans/tornadoes etc), to microwave point to point links to mobile phone networks 2/3/4G and everything in-between.
Now in this admittedly small pool the only odd thing that we’ve noticed was that all had daughters whilst working on the tools but when they’ve come off the tools into management roles they’ve had sons. Also we don’t seem to suffer any more health problems compared to the rest of the telecoms staff we’ve work around.
Also I will add the caveat that most of what I’ve worked on is is at longer wavelengths than most 5G systems, microwave stuff falls into the same bands that 5G can use, 5G has a very wide spectrum allocated to it, 600Mhz-6GHz and 24GHz to 86GHz.