title: Use of commercial sources of Newcastle disease virus: production, purification, and characterization.
mesh_terms: D000482:Allantois / Q000382:microbiology; D000818:Animals; D002642:Chick Embryo; D006386:Hemagglutination Tests; D006801:Humans; D007372:Interferons / Q000096:biosynthesis; D008722:Methods; D009522:Newcastle disease virus / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D007372:Interferons