title: Further studies on interferon and virus production in young and old cell cultures prepared from ordinary and RIF-free chick embryos.
mesh_terms: D000367:Age Factors; D000818:Animals; D000941:Antigens / Q000032:analysis; D002642:Chick Embryo; D046508:Culture Techniques; D004669:Encephalitis Viruses, Tick-Borne / Q000032:analysis* / Q000378:metabolism / Q000472:pathogenicity; D005455:Fluorescent Antibody Technique; D007372:Interferons / Q000096:biosynthesis*; D051379:Mice; D014776:Virus Cultivation; D014779:Virus Replication
chemical_list: D000941:Antigens; D007372:Interferons