The targeting of effector molecules in the immune system.
D000818:Animals; D000906:Antibodies / Q000276:immunology; D000941:Antigens / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D007107:Immune System / Q000276:immunology*; D007111:Immunity, Cellular; D013601:T-Lymphocytes / Q000276:immunology
D000906:Antibodies; D000941:Antigens