It is important to carefully match the donor and recipient’s blood type because people have different blood groups so if the donors blood cells have surface molecules that are different from those of the recipient the antibodies in the recipient’s blood will recognize the blood as foreign and will then trigger an immune reaction that will result in blood clotting called agglutination transfusing the wrong blood could also be deadly by causing possible kidney failure. If the donor’s blood correctly matches with the recipient the body it will not see them as foreign and will not trigger an immune response.
