Alloimmunization is a response by the body's immune system to
donated blood or bone marrow or a transplanted organ. In alloimmunization, a
person's body develops antibodies—proteins that attack and destroy foreign
substances—that target the donated material.
A person receiving repeat blood transfusions may develop antibodies
to the donor blood. Alloimmunization makes repeated transfusions more
How this information was developed to help you make better health decisions.