Coming to your second question, radiation can cause poisoning. Electromagnetic radiation such as short wavelength UV, X-rays or gamma radiation cause DNA damage in organism exposed to them. The damage leads to malfunction of cells and then organs. Many people for instance died of radiation poisoning in Chernobyl post meltdown of a nuclear reactor. And yeah cells stressed with such radiation also turn on defence response. But that is a different ball game altogether and is unrelated to viruses. If someone tells you that radiation from 5g tower is toxic they would be making that shit up. Remember that for radiation poisoning you need UV and shorter wavelengths.