title: Contamination of egg-adapted canine distemper vaccine by avian leukosis virus.
mesh_terms: D000818:Animals; D001354:Avian Leukosis Virus / Q000472:pathogenicity*; D002642:Chick Embryo; D046508:Culture Techniques; D004216:Distemper / Q000276:immunology*; D004285:Dogs; D014765:Viral Vaccines
chemical_list: D014765:Viral Vaccines