With 3% REID, Mars mission with 6 astronauts means that there is 17% change that at least one of them has radiation exposure-induced death. The change of non-

With 3% REID, Mars mission with 6 astronauts means that there is 17% change that at least one of them has radiation exposure-induced death. The change of non-fatal radiation-induced injuries (surviving cancers, cognitive/neuronal damage, vision loss) would be probably much higher. Maybe Mars mission needs to pack in radiation therapy equipment and drugs for chemotherapy.