Answer:
To lower the risk of graft rejection
Step-by-step explanation:
Allogenic skin grafting is a process in which skin grafting is done between two persons who are not genetically Identical. As the immune system will be active against the skin graft. There is high risk that the receiver's body will treat it as foreign object and will try to reject it or destroy. So the immune system of such patients is suppressed to limit the risk.