"The factor of immunization" in allograft rejection: carried by cytotoxic T cells, not helper-inducer T cells.
D000818:Animals; D006084:Graft Rejection; D016027:Heart Transplantation; D007114:Immunization; D051381:Rats; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*