The two types of adaptive immune are humoral immunity and cell-mediated<span> immunity, the </span>Rejection during organ transplantation is caused by the immune system response to alloantigens on the graft. From species to species and person to person, proteins are different and perceived as a foreign intruding object by the body. It is essentially an immunological response, where the antibodies produced by B and T lymphocytes attack the graft or organ.
