The immune response.
D000941:Antigens; D001327:Autoimmune Diseases / Q000209:etiology / Q000276:immunology; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology; D002454:Cell Differentiation; D005809:Genes, Regulator; D006649:Histocompatibility Antigens; D006801:Humans; D007111:Immunity, Cellular; D013601:T-Lymphocytes / Q000276:immunology
D000941:Antigens; D006649:Histocompatibility Antigens