title: The suitability of various challenge strains of Newcastle disease virus for use in potency tests of live and inactivated vaccine.
mesh_terms: D000818:Animals; D002645:Chickens; D009521:Newcastle Disease / Q000517:prevention & control*; D009522:Newcastle disease virus / Q000276:immunology*; D012015:Reference Standards; D014613:Vaccines, Attenuated / Q000008:administration & dosage / Q000592:standards*; D014765:Viral Vaccines / Q000008:administration & dosage / Q000592:standards*
chemical_list: D014613:Vaccines, Attenuated; D014765:Viral Vaccines