Allograft is a form of tissue transplantation where tissue or organs are transferred from one individual to another within the same species. This process involves matching the donor and recipient in terms of tissue type to reduce the risk of rejection. Allografts are commonly used in medical procedures such as organ transplants, skin grafts, and bone grafts. The success of allograft transplantation depends on the compatibility between the donor and recipient, as well as the use of immunosuppressive drugs to prevent rejection. Research in this area focuses on improving the success rates of allograft procedures and reducing the risks associated with rejection.