Clinical picture of chronic radiation sickness at different periods of its course

On the basis of prolonged clinical and experimental studies clinical classification of radiation sickness as a result of exposure to general external radiation is proposed. Three periods of the course of the disease were specified: 1) formation; 2) recovery; 3) long-term consequences. Clinical characteristics of the periods and pathogenesis of detected changes are given. It is suggested the necessity for reduction of limiting permissible radiation dose (accepted at that time).