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

Broberg, EevaMelidou, AngelikiProsenc, KatarinaBragstad, KarolineHungnes, OlavWHO European Region and the European Influenza Surveillance Network members of the reporting countries2017-03-082017-03-082016-03-31Euro Surveill. 2016;21(13). doi: 10.2807/1560-7917.ES.2016.21.13.301841560-7917http://hdl.handle.net/10400.18/4568Members of the World Health Organization European Region and European Influenza Surveillance Network of the reporting countries - Portugal: Raquel Guiomar, Pedro Pechirra, Paula Cristovão, Inês Costa, Patrícia Conde, Baltazar Nunes, Ana RodriguesInfluenza 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.engEpidemiological MonitoringEuropeFemaleHemagglutination Inhibition TestsHumansInfluenza A Virus, H1N1 SubtypeInfluenza B virusInfluenza VaccinesInfluenza, HumanMaleMolecular EpidemiologyRNA, ViralSeasonsSentinel SurveillanceSequence Analysis, DNATreatment OutcomeDeterminantes da Saúde e da DoençaPredominance 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 Europejournal article10.2807/1560-7917.ES.2016.21.13.30184