title: On a new antigen in virus-infected cells.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D003168:Complement Fixation Tests; D005321:Extraembryonic Membranes / Q000276:immunology; D007106:Immune Sera; D009522:Newcastle disease virus / Q000276:immunology; D009975:Orthomyxoviridae / Q000276:immunology; D009976:Orthomyxoviridae Infections / Q000276:immunology*; D010222:Parainfluenza Virus 1, Human / Q000276:immunology*; D011817:Rabbits
chemical_list: D000941:Antigens; D007106:Immune Sera