An allograft is a type of tissue transplant where cells, tissues, or organs are taken from one individual and transplanted into another individual of the same species. This procedure is commonly used in medical treatments, such as organ transplants, skin grafts, and bone grafts, to replace damaged or diseased tissues. The donor and recipient are usually not genetically identical, which can lead to the risk of rejection by the recipient's immune system. To minimize rejection, doctors often use immunosuppressive medications to help the recipient's body accept the allograft. Successful allografts can significantly improve the quality of life for patients, allowing them to regain function and health. Common sources of allografts include deceased donors and living donors, such as family members or friends, who voluntarily provide tissue or organs for transplantation.