The effects of different kinds of blood tranfusion on the immune response in combined radiation-burn injury after allodermal grafting were observed in rats.The rats were inflicted with 5 Gy of whole body gamma ray irradiation and 15%TBSA full thickness burns.Then the rats wers given with different kinds of blood transfusion and their burn wounds were covered with allodermal grafts.It was found that the transfusion of irradiated blood can suppress the effects of blood on the immune response of the recipients and then prolong the survive time of the allo-dermal grafts.