Weekly updates: 2022 West Nile virus transmission season


This weekly report provides an overview of West Nile virus (WNV) epidemiology in the EU/EEA and EU-neighbouring countries during the WNV transmission season (expected to be June-November). Following a One Health approach, WNV infections in humans and outbreaks in equids and birds are included in the report. Visit the dedicated webpages for more information on WNV infections and ECDC’s seasonal WNV surveillance.

As of 22 June 2022, European Union (EU), European Economic Area (EEA) and EU-neighbouring countries reported no human cases of West Nile virus (WNV) infection during the 2022 transmission season.

Since the beginning of the 2022 transmission season, no outbreaks among equids and no outbreaks among birds have been reported by EU/EEA countries.

A set of WNV transmission maps and a dashboard will be published on Fridays once the first WNV infections of the 2022 transmission season are reported.

Interactive dashboard

Case definition

EU case definition for diagnosing and reporting West Nile virus infection, under Decision No 2119/98/EC of the European Parliament and of the Council.

See West Nile virus infection

ECDC publishes weekly WNV epidemiological updates during the WNV transmission season, including the geographical distribution of human cases in the EU/EEA and EU neighbouring countries. In addition, ECDC includes maps in its epidemiological updates highlighting areas where WNV outbreaks among equids have been reported. Read more