The described methods for ultraviolet blood radiation were used in 80 patients: 51 had tuberculosis of the bronchopulmonary system and 29 nonspecific pulmonary diseases. A marked clinical effect was confirmed by subjective and objective methods. In all cases blood pressure moderately decreased, there was a tendency to hypercoagulation decline, the erythrocyte count and hemoglobin level increased. The microstructure of blood elements studied by a scanning electron microscope showed formation of the rosette-forming structures in the blood and a significant increase in deformed erythrocytes.