Killing comes naturally.
D000941:Antigens; D000954:Antigens, Surface / Q000032:analysis; D007372:Interferons / Q000494:pharmacology; D007694:Killer Cells, Natural / Q000276:immunology*; D008285:Major Histocompatibility Complex; D013601:T-Lymphocytes / Q000276:immunology
D000941:Antigens; D000954:Antigens, Surface; D007372:Interferons