[Immuno-epidemiological study of the natural variation of A and B viruses in Rumania during the past 30 years].
D006801:Humans; D066298:In Vitro Techniques; D007251:Influenza, Human / Q000453:epidemiology*; D009975:Orthomyxoviridae; D012383:Romania
Immunoépidemiologicheskoe izuchenie estestvennoi izmenchivosti virusov A i B v rumynii za poslednie 30 let.