After the rats were inflicted with 8 Gy total body gamma ray irradiation and 15 % total body surface area （TBSA） full thickness burn injury

they were treated with blood transfusion （BT） and bone marrow transplantation （BMT）. Then the survival of allografts grafted on the escharectomized burn wounds in the 24

48 and 72 h postinjury was observed. It was found that when the burn wounds were closed with allo- grafts in the 24h postinjury

there were an early elevation of leucocytes

the appearance of the donor’s cells and a significantly higher survival rate of the rats on the 30 day postinjury. The allografts could survive longer and wounds showed no signs of infection and healed quicker. When the allografts were grafted in the 48 h or 72 h postinjury

only harmful effects to hasten the death of rats were observed.