A 28-year-old patient underwent endometrectomy as a result of incomplete abortion. Blood loss was at the rate of 900 ml. It was necessary to start hemotransfusion. After transfusion of 60 ml of erythrocytic mass the patient presented with lumbar pain and fever which resulted in hemotransfusion stoppage. 20 minutes later the patient's condition got worse: she developed adynamia, apparent skin pallor, acrocyanosis, profuse perspiration. to- 38,5°C, Ps-110/min, AP- 70/40 mm Hg. What is the most likely diagnosis?