title: [Preliminary studies on the efficacy of treating twice with different virus strains for S180 ascitic mice].
mesh_terms: D000818:Animals; D009980:Influenza A virus / Q000276:immunology; D051379:Mice; D009522:Newcastle disease virus / Q000276:immunology; D012510:Sarcoma 180 / Q000628:therapy*; D012845:Sindbis Virus / Q000276:immunology