West Nile virus cases reach 396 in Greece as 17 municipalities classified as high risk
According to EODY’s latest epidemiological surveillance data, 396 locally acquired West Nile virus cases had been recorded in Greece by September 24, 2026. A total of 36 deaths have also been reported among patients infected with the virus, while 26 new cases were recorded during the latest week.
All 36 recorded deaths occurred among patients aged over 60, with a median age of 83. EODY reported that 255 of the 396 patients experienced central nervous system complications, including encephalitis, meningitis or acute flaccid paralysis.
17 municipalities classified as high risk
Among the municipalities newly classified as high risk is Arriana in Rhodope, along with municipalities in Attica, Thessaly, Central Macedonia, Pieria, Corinthia, Heraklion and the Cyclades.
The 17 high-risk municipalities are:
- Heraklion Attica
- Nea Smyrni and Palaio Faliro
- Nea Filadelfeia–Nea Chalkidona
- Dafni–Ymittos
- Nikaia–Agios Ioannis Rentis
- Mouzaki, Karditsa
- Farkadona, Trikala
- Amphipolis, Serres
- Neapoli–Sykies
- Pavlos Melas
- Oraiokastro
- Pylaia–Chortiatis
- Pydna–Kolindros, Pieria
- Corinth
- Arriana, Rhodope
- Hersonissos, Heraklion
- Tinos
EODY said the municipalities classified as high risk have not recorded human West Nile virus cases during the current transmission season. Their classification is instead based on epidemiological and geographical factors, including previous surveillance data and developments in neighboring areas.
The designation is separate from municipalities already classified as “affected” because human cases have been recorded there during the 2026 transmission period.
Authorities urge mosquito protection
West Nile virus is transmitted primarily through the bites of infected mosquitoes. EODY continues to recommend measures to reduce exposure to mosquitoes, particularly for older people and others who may be at increased risk of severe disease.
The latest figures indicate that the virus remains in circulation as Greece continues through the mosquito transmission season, with health authorities maintaining enhanced epidemiological surveillance.
