Risk assessment: Seasonal influenza 2014–2015 in the EU/EEA countries
This risk assessment covers the 2014–2015 influenza season in the European Union and European Economic Area (EU/EEA).
- The EU/EAA influenza season started in week 1/2015, with 26% of sentinel specimens positive for influenza.
- Subtype A(H3N2) viruses are dominant in almost all reporting European countries, and the majority of genetically characterised A(H3N2) viruses belong to subgroups distinct from the currently recommended vaccine-strain A/Texas/50/2012.
- As a consequence of the mismatch between vaccine and circulating strains, reduced vaccine effectiveness is expected, as suggested by early effectiveness estimates (< 25%) in the USA, where similar circulating drift variants were detected.
- Among laboratory-confirmed influenza cases admitted to ICUs, 95% were related to influenza A viruses, 73% of which were A(H3N2) viruses.
- Post-exposure prophylaxis and early treatment with neuraminidase inhibitors should be offered to high-risk groups and influenza-infected elderly.
Risk assessment for seasonal influenza, EU/EEA, 2017–2018
20 Dec 2017 - First detections indicated circulation of A(H3N2) and B/Yamagata viruses. As the former subtype dominated last season, a high proportion of the population should be protected. However, the emergence of variant strains cannot be excluded and this would increase the likelihood of severe outcomes in the elderly
Risk assessment update: seasonal influenza, EU/EEA, 2016–2017
25 Jan 2017 - This updated risk assessment provides an overview of the current influenza situation in Europe.