Weekly updates: 2020 West Nile virus transmission season

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Situation update

Between 18 and 24 September 2020, EU Member States reported 34 human cases of WNV infection: Greece (14), Italy (9), Spain (6) and Germany (5). Three regions in Germany reported locally-acquired human cases of WNV infection for the first time (regions of Barnim, Ostprignitz-Ruppin and Saalekreis). All other cases were reported from areas that have been affected during previous transmission seasons. This week, seven deaths were reported by Greece (3), Italy (3) and Spain (1). No human cases of WNV infection or deaths were reported from EU neighbouring countries.

On 24 September 2020, Spanish public health authorities reported the first locally-acquired human WNV infection in the province of Badajoz. This case has not yet been reported through TESSy and is therefore not currently represented on the maps and in the Surveillance Atlas.

Since the start of the 2020 transmission season and as of 24 September 2020, EU Member States have reported 243 human cases of WNV infection and 28 deaths through TESSy: Greece (123, including 19 deaths), Spain (67, including 6 deaths), Italy (41, including three deaths), Germany (5), Romania (4) and Hungary (3). Three regions in Germany reported autochthonous human cases of WNV infection for the first time (regions of Barnim, Ostprignitz-Ruppin and Saalekreis). All other cases were reported from areas that have been affected during previous transmission seasons. No cases have been reported from EU-neighbouring countries.

Since the beginning of the 2020 transmission season, 127 outbreaks among equids have been reported. These outbreaks have been reported by Spain (99), Germany (12), Italy (11), France (3), Hungary (1) and Portugal (1) through ADNS. No outbreaks among birds have been reported through ADNS.

Data from the ECDC surveillance Atlas

Weekly maps

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West Nile virus in Europe in 2020 - human cases compared to previous seasons, updated 24 September 2020

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West Nile virus in Europe in 2020 - outbreaks among equids and/or birds, updated 24 September 2020

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West Nile virus in Europe in 2020 - human cases, updated 24 September 2020

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West Nile virus in Europe in 2020 - infections among humans and outbreaks among equids and/or birds, updated 24 September 2020

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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.

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