[en] The data on the effect of different compounds of ²³⁹Pu, ²⁴¹Am, ²⁵²Cf, ²²⁸Th, ¹⁴⁷Pm, ³H, ¹³⁷Cs, ⁹⁰Sr, ⁷⁵Se, ³⁵S, ¹³¹I, ¹²⁵I, ¹⁴C, ⁹⁰Y on the organism under isolated and combined effect with factors of radiation and non-radiation nature, are generalized. The information on the delayed consequences of radiation effect from external and internal radiation sources on various organism systems, such as hematopoietic, immune, neuroendocrinal cardiovascular, osteal system, gastrointestinal tract, sexual glands, skin, vission organ, fetus and posterity is presented. Much attention is paid to the development of tumour and non-tumour forms of delayed pathology, the estimation of risk of development of different localization tumours and the principles of transferring the experimental data from animals to human beings