title: Predominance of influenza A(H1N1)pdm09 virus genetic subclade 6B.1 and influenza B/Victoria lineage viruses at the start of the 2015/16 influenza season in Europe.
abstract: Influenza A(H1N1)pdm09 viruses predominated in the European influenza 2015/16 season. Most analysed viruses clustered in a new genetic subclade 6B.1, antigenically similar to the northern hemisphere vaccine component A/California/7/2009. The predominant influenza B lineage was Victoria compared with Yamagata in the previous season. It remains to be evaluated at the end of the season if these changes affected the effectiveness of the vaccine for the 2015/16 season.
authors.affiliation: European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden.
authors.forename: Eeva
authors.initials: E
authors.lastname: Broberg
authors.forename: Angeliki
authors.initials: A
authors.lastname: Melidou
authors.forename: Katarina
authors.initials: K
authors.lastname: Prosenc
authors.forename: Karoline
authors.initials: K
authors.lastname: Bragstad
authors.forename: Olav
authors.initials: O
authors.lastname: Hungnes
mesh_terms: D062665:Epidemiological Monitoring; D005060:Europe / Q000453:epidemiology; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000145:classification / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D009981:Influenza B virus / Q000145:classification / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000276:immunology*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control* / Q000821:virology*; D008297:Male; D017720:Molecular Epidemiology; D012367:RNA, Viral / Q000235:genetics; D012621:Seasons; D018571:Sentinel Surveillance; D017422:Sequence Analysis, DNA; D016896:Treatment Outcome
chemical_list: D007252:Influenza Vaccines; D012367:RNA, Viral
keywords: A(H1N1)pdm09; emergence; influenza B virus; influenza virus; season; surveillance