Date Key facts
Since the beginning of the 2026 transmission season, and as at 14 October, 222 areas affected by West Nile virus (WNV) have been identified in 19 countries across Europe. These 19 countries have reported 1 926 locally acquired human cases of WNV infection. This week , 14 areas are reported as…
Since the beginning of the 2026 transmission season, and as at 7 October, 208 areas affected by West Nile virus (WNV) have been identified in 18 countries across Europe. This week , six areas are reported as affected for the first time this season. These 18 countries have reported 1 855 locally…
Since the beginning of the 2026 transmission season, and as at 30 September, 202 areas affected by West Nile virus (WNV) have been identified in 16 countries across Europe. This week, 16 areas are reported as affected for the first time this season. The 16 countries have reported 1 765 locally…
Since the beginning of the 2026 transmission season, and as at 23 September, 186 areas affected by West Nile virus (WNV) have been identified in 16 countries across Europe. This week, six areas are reported as affected for the first time this season. The 16 countries have reported 1 569 locally…
Since the beginning of the 2026 transmission season, and as at 17 September, 180 areas affected by West Nile virus (WNV) have been identified in 16 countries across Europe. This week, 19 areas are reported as affected for the first time this season. The 16 countries have reported 1 482 locally…
Since the beginning of the 2026 transmission season, and as at 10 September, 161 areas affected by West Nile virus (WNV) have been identified in 15 countries across Europe. These areas are located in Italy (64), Greece (21), Romania (20), France (14), the Netherlands (10), Serbia (7), Croatia (5)…
Since the beginning of the 2026 transmission season, and as at 3 September, 144 areas affected by West Nile virus (WNV) have been identified in 15 countries across Europe. These areas are located in Italy (62), Greece (19), Romania (17), France (13), Serbia (7), the Netherlands (5), Croatia (4)…
Since the beginning of the 2026 transmission season, and as at 26 August, 124 areas affected by West Nile virus (WNV) have been identified in 15 countries across Europe. These areas are located in Italy (55), Greece (17), Romania (15), France (13), Serbia (six), Spain (four), North Macedonia (three)…
Since the beginning of the 2026 transmission season, and as at 21 August, 98 areas affected by West Nile virus (WNV) have been identified in 12 countries across Europe. These areas are located in Italy (46), Greece (16), Romania (14), France (eight), North Macedonia (three), Spain (three), Albania…
Since the beginning of the 2026 transmission season, and as at 13 August, 77 areas affected by West Nile virus (WNV) have been identified in nine countries across Europe. These areas are located in Italy (40), Greece (13), Romania (12), France (four), North Macedonia (three), Spain (two), Germany…
Since the beginning of the 2026 transmission season, and as at 5 August, 59 areas affected by West Nile virus (WNV) have been identified in seven countries across Europe. These areas are located in Italy (36), Greece (nine), Romania (six), North Macedonia (three), Spain (two), France (two), and…
Since the beginning of the 2026 transmission season, and as at 29 July, 35 areas affected by West Nile virus (WNV) have been identified in seven countries across Europe. These areas are located in Italy (30), Greece (eight), Romania (four), North Macedonia (two), Spain (two), France (two), and…
Since the beginning of the 2026 transmission season, and as at 22 July, 35 areas affected by West Nile virus (WNV) have been identified in six countries across Europe. These areas are located in Italy (20), Greece (six), Romania (four), North Macedonia (two), Spain (two) and France (one).
Since the beginning of the 2026 transmission season, and as at 15 July, 28 areas affected by West Nile virus (WNV) have been identified in five countries across Europe. These areas are located in Italy (17), Greece (five), North Macedonia (two), Romania (two) and Spain (two).
Since the beginning of the 2026 transmission season, and as of 8 July, 11 areas affected by West Nile virus (WNV) have been identified in five countries across Europe. These areas are located in Italy (five), North Macedonia (two), Romania (two), Greece (one) and Spain (one).
In Europe, since the beginning of 2026, and as of 1 July, three countries have reported six human cases of West Nile virus (WNV) infection: Italy, Romania and North Macedonia.
In Europe, since the beginning of 2026, and as of 24 June, two countries have reported three human cases of West Nile virus (WNV) infection: Italy and North Macedonia.
This is the third weekly seasonal surveillance report of West Nile Virus (WNV) infections in 2026. In Europe, since the beginning of 2026 and as of 10 June, only North Macedonia has reported one human case of West Nile virus infection.
This is the second weekly seasonal surveillance report of West Nile Virus (WNV) infections in 2026. In Europe, since the beginning of 2026, and as of 3 June, only North Macedonia has reported one human case of West Nile virus infection.
This is the first weekly seasonal surveillance report of West Nile Virus (WNV) infections in 2026. In Europe, since the beginning of 2026, and as of 27 May, only North Macedonia reported one human case of West Nile virus infection.