title: [A study of the genetic marker M of vaccinia virus variants].
mesh_terms: D000818:Animals; D002490:Central Nervous System / Q000473:pathology*; D005827:Genetics, Microbial; D000882:Haplorhini; D014615:Vaccinia / Q000473:pathology*; D014616:Vaccinia virus
vernacular_title: Izuchenie geneticheskogo M-priznaka variantov virusa ospovaktsiny.