The linked source doesn't contain the word "5G" but it talks about radiation from 30 kilohertz to 300 gigahertz (30 kHz - 300 GHz). This encompasses 5G by a very large margin. The article makes the following conclusion about this frequency range:
> The only consistently recognized biological effect of radiofrequency radiation in humans is heating. The ability of microwave ovens to heat food is one example of this effect of radiofrequency radiation. Radiofrequency exposure from cell phone use does cause heating to the area of the body where a cell phone or other device is held (e.g., the ear and head). However, it is not sufficient to measurably increase body temperature. There are no other clearly established effects on the human body from radiofrequency radiation.
"The [WHO] Working Group classified cell phone use as “possibly carcinogenic to humans, ..."
2) You're gonna love this ... phone mfgs. test the in-use radiation pattern at 3" to 4" from your ear. In other words, exactly how people don't use a phone.
So we're a long way from proving phones are safe.
You would even be excused if you thought there was a conspiracy to cover up the risk, because nobody is trying very hard to test them as commonly used - against the ear or in your pocket next to your skin for 16 hours a day.
If cell phones caused cancer then almost everyone would have cancer, because for over a decade almost everyone has been using a cell phone.
If cell phones caused cancer then we would see increasing rates of cancer in areas most exposed to radiation from cell phones, like skin and head. What we actually see are that the deadliest cancers are lung, colorectal, breast, and pancreatic. With the possible exception of breast cancer, these are all illnesses that occur deep in the body, where they are least likely to be affected by radiation from cell phones.
At worst we can say that if cell phones cause cancer, they do so at a rate that is indistinguishable from the existing incidence of cancer.
> phone mfgs. test the in-use radiation pattern at 3" to 4" from your ear. In other words, exactly how people don't use a phone.
In most modern phones the antenna is at the bottom (or at the very least the iPhone and Samsung Galaxy line - but I think also most other). That's a few inches from the ear.
I was a bit surprised to learn this and now keep my phone right-side-up in my pocket, to keep the EM radiation source away from the balls.