Contaminant viruses in two live virus vaccines produced in chick cells.
D000818:Animals; D001354:Avian Leukosis Virus; D002642:Chick Embryo; D066298:In Vitro Techniques; D008458:Measles Vaccine; D009500:Neutralization Tests; D014762:Viral Interference; D014765:Viral Vaccines; D014776:Virus Cultivation; D015004:Yellow Fever
D008458:Measles Vaccine; D014765:Viral Vaccines