Through the history of wireless communication I show the explosive growth in time of mobile telephony and explain how this affects the perception of fear of the general public for electromagnetic radiation. Then, after explaining the physics of electromagnetic radiation, I discuss the interaction with the human body. I explain how RF and microwave radiation cannot be directly carcinogenic. Then I discuss the heating effect of RF and microwave radiation and the exposure limits to prevent adverse health effects for humans. After explaining how a correlation between electromagnetic fields and electromagnetic hypersensitivity has not been established, I will discuss the probability and possibility of a causal relationship between long-term RF radiation exposure and cancer. I will discuss the viewpoint of the World Health Organization that considers RF radiation as possibly carcinogenic for humans and those of leading expert organizations and conclude with current and future epidemiologic research.