Answer
Transfusion reaction is a reaction in which the transfused blood (donor's blood) is recognized as a threat by the antibodies of the recipient's blood due to which the recipient's antibodies attack the donor's blood by binding to its RBCs, this results in agglutination and lysis of RBCs.
Work Step by Step
In the blood, RBCs have one, both, or no A and B antigens on their surface. The A and B antigens, as well as the Rh antigen, are known as agglutinogens. These agglutinogens present in a person's blood are recognized by the immune system, and any blood cells that do not match the blood of the person is attacked by antibodies. Transfusion reaction is caused when mismatched blood is transfused.