The health effects associated with domestic radon exposure has not been fully and conclusively mapped out yet, but major efforts have been made to try and understand if the exposure to radon will increase the risk of diseases like lung cancer and childhood leukaemia.
Studies are complex as other environmental factors such as diet, smoking habits and genetics all increase the risk.
A review of the historical developments and the current status of the scientific studies of the health effects associated with radon can found here, first in connection with lung cancer and following that, childhood leukaemia.
Read more about radon and lung cancer