title: [The persistence of influenza A viruses and its role in the epidemic process].
authors.forename: A F
authors.initials: AF
authors.lastname: Frolov
mesh_terms: D004196:Disease Outbreaks; D014644:Genetic Variation; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification / Q000472:pathogenicity*; D007251:Influenza, Human / Q000453:epidemiology* / Q000209:etiology / Q000382:microbiology
vernacular_title: Persistentsiia virusov grippa A i ee rol' v épidemicheskoĭ protsesse.