In April 2009, ECDC organised an expert consultation on West Nile Virus (WNV) infection. The main objectives of the meeting were to provide an overview of the current situation regarding WNV and to address gaps in the current knowledge. Further objectives included identifying the role of the ECDC in order to strengthen preparedness and response at the European level. The meeting brought together a multidisciplinary group of experts from Europe and around the world and this report summarises the presentations and discussions held over the course of the two day consultation.