Eurosurveillance
Volume 21, Issue 16, 21 April 2016
http://www.eurosurveillance.org/Public/Articles/Archives.aspx?PublicationId=11678

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Editorials
Importance of timely monitoring of seasonal influenza vaccine effectiveness
by RG Pebody, K Mølbak

Surveillance report
Pandemic vaccination strategies and influenza severe outcomes during the influenza A(H1N1)pdm09 pandemic and the post-pandemic influenza season: the Nordic experience
by J Gil Cuesta, P Aavitsland, H Englund, Ó Gudlaugsson, SH Hauge, O Lyytikäinen, G Sigmundsdóttir, A Tegnell, M Virtanen, the Nordic influenza comparison group, T Grove Krause

Systematic review
Concordance of interim and final estimates of influenza vaccine effectiveness: a systematic review
by VK Leung, BJ Cowling, S Feng, SG Sullivan

Review articles
Lessons learnt to keep Europe polio-free: a review of outbreaks in the European Union, European Economic Area, and candidate countries, 1973 to 2013
by T Derrough, A Salekeen