Influenza in the season of 2014-2015 in Russia: epidemiology and properties of viruses

Abstract

There are presented data of Federal Influenza Center of Russia on morbidity of influenza, intensity, duration, geographical spread of epidemic, recorded lethal outcomes with laboratory-confirmed diagnosis "influenza" in the season of 2014-2015. The epidemic in this season was more intensive in character in comparison to the previous season according to most of the indices. Main etiologic agents were influenza B - 50,6 % of isolated strains, the portion of influenza A(H3N2) viruses accounted for 45 % of isolates and pandemic influenza 2009 virus was revealed only in 4,35 % of studied clinical materials. Incomplete compliance of influenza vaccine for the component A (H3N2), observed in the world in 2015, and especially the further evolution of this group of viruses in the current season demonstrate the importance of the widest possible coverage by epidemiological studies, isolation of the virus in different periods of the epidemic season in different geographical regions and etiological analysis of them with the use of modern methods for the increase of the efficacy of vaccination

Keywords

influenza / epidemic season 2014-2015 / antigenic analysis / strain composition of flu vaccines

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