The precondition for transfusion of blood to an accident victim is

The precondition for transfusion of blood to an accident victim is cross-matching the blood group of the donor with that of the accident victim. This is important because if the blood types are not compatible, it can cause a life-threatening reaction in the recipient's body. Seeking the consent of the victim's parents, ascertaining the victim's religious belief, and rewarding the donor with food and money are not preconditions for blood transfusion. It is important to ensure that the blood donor is free of any diseases that could be transmitted through the transfusion, but curing the donor of any disease traced in his blood is not a precondition for blood transfusion.