Radon is a risk factor in illnesses such as cancer. Like most actual cases of such illnesses it's usually impossible to tie the cause back to a specific risk. As such you are very unlikely to come across cases of people "dying as a result of Radon". My own father died from cancer. We will never be able to tell if the primary cause was genetic (lots of others in his family had cancer), the smokes (he had been a heavy smoker up to 15+ years before his death), work that he had done years ago with asbestos, other work that he had done down the sewers, a combination of all of these and/or something else altogether. Note that asbsetos as an insulator is OK as long as it's intact. The problem arises if/when it starts to degrade/disintegrate and the dust becomes airborne. For more on Radon see .