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Surveillance and disease data for West Nile virus infections

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Weekly updates: 2023 West Nile virus transmission season

Weekly updates with the latest reports on West Nile virus cases in Europe. Interactive maps and tables updated every Friday, during the transmission season.

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About seasonal surveillance

The data should inform the blood safety authorities of areas with ongoing transmissions. According to the EU law, donors should be differed/tested.

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Seasonal surveillance: Previous seasons

Historical data for the West Nile virus surveillance is available by year, since 2011.

Page last updated 4 May 2020