As of 1 February 2021, European Union (EU) and European Economic Area (EEA) Member States and EU-neighbouring countries reported 336 locally-acquired human cases of West Nile virus infections in 2020. The last case of this transmission season was reported by the Netherlands in week 47.

French authorities have reported an increased number of dengue cases in Martinique in recent months. The number of cases notified constitute the largest outbreak reported on the island in the last decade.

On 30 October, French authorities reported a third autochthonous case of Zika virus (ZIKV) disease in Hyères city, Var department, France. The case had no travel history to Zika-endemic countries.

On 21 October, French authorities reported a second autochthonous case of Zika virus (ZIKV) disease in Hyères city, Var department, France with no travel history to Zika-endemic countries.

There were only minor fluctuations in reported cases of three main zoonotic diseases in the European Union (EU) last year compared with 2016.

Since the last epidemiological update on 31 August 2018, European countries have reported 530 new West Nile virus (WNV) cases and 52 deaths. The number of WNV infections reported so far exceeds the total number of infections in the previous five years.

A new map shows the geographic distribution of Anopheles maculipennis s.l. in the EU/EEA and neighbouring countries.

In the past week, the first human cases of West Nile fever have been reported in the EU for the current transmission season.

Since the beginning of 2018 and as of 14 May, 2 980 autochthonous cases of dengue have been reported in Réunion. The main areas affected are in the western part of the island. The most prevalent serotype among dengue cases is DENV-2 and the main vector implicated in the outbreak is Aedes albopictus.