I would get it in the context that all materials have an em resonant frequency, and multiple modes of the frequency. Basically the material will start to vibrate with all of the energy you provide it, which is how a microwave works. I guess the fear is that certain frequencies can do this (beside the obvious, microwaves).

I get the fear, and I wouldn't doubt that there would be limited research on this at the moment, but it also seems really unlikely given how much we've used this band in the past with no ill effects.

For those worried, they can move to western New Mexico and specifically West Virginia; the radio telescopes there make it illegal to even drive a gas car because the spark plugs cause too much em interference. Zero EM radiation... besides what you get from space. 

 I’m fuzzy on exactly what freqs are where on the spectrum, but I’d bet there are already things considerably worse than 5G baking our brains all the time already. Only case they can make is that the short range of 5G and the limited coverage will mean you’ll have 50 transmitting stations bombarding you at the same time, instead of 1 like you used to. 

But….that’s still a city folk problem. Or guys w/ poor em shielding in their home, supposedly the higher band 5G stuff can’t even pass through windows, right?