From the start of surveillance until September 2, 2026, 521 confirmed cases of West Nile Virus (WNV) infection have been reported in Italy, with 89 new cases in the last week. Of these, 269 were neuroinvasive (4 imported: Maldives, France, Belgium, Greece), 70 asymptomatic in blood donors, 179 with fever (1 imported from Burkina Faso), 2 with other symptoms, and 1 asymptomatic. 26 deaths have been reported.
The number of provinces with WNV circulation has increased to 75 in 19 Italian regions. The case fatality rate for autochthonous neuroinvasive forms is 9.4%.
