A millisievert is a very low dose. The ICRP (International Commission on Radiological Protection) evaluates as follows the effects by applying the calculation of the no-threshold linear relation : one dose of 1 mSv triggers up to 50 fatal cancers, 10 treatable cancers and 13 genetic diseases per million. These figures compare with the 250,000 cancers that will affect one day, all causes merged, this million people