title: Purification of an antivariola vaccine by a combination of two methods.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002850:Chromatography, Gel; D046508:Culture Techniques; D006846:Hydrocarbons, Halogenated; D008722:Methods; D011134:Polysaccharides; D012900:Smallpox Vaccine / Q000302:isolation & purification*; D014616:Vaccinia virus / Q000032:analysis* / Q000472:pathogenicity; D014764:Viral Proteins / Q000032:analysis
chemical_list: D006846:Hydrocarbons, Halogenated; D011134:Polysaccharides; D012900:Smallpox Vaccine; D014764:Viral Proteins