Influenza season 2013/14 has started in Europe with influenza A(H1)pdm09 virus being the most prevalent subtype Adlhoch, C and Broberg, E and Beauté, J and Snacken, R and Bancroft, E and Zucs, P and Penttinen, P and on behalf of European Influenza Surveillance Network (EISN), Eurosurveillance, 19, 20686 (2014), https://doi.org/10.2807/1560-7917.ES2014.19.4.20686