Growing concern has emerged across Greece over a sharp rise in West Nile virus (WNV) cases, with Eastern Attica bearing the brunt of the outbreak. According to data released by the Hellenic National Public Health Organization (EODY), this region is currently the most affected nationwide. In response, health and municipal authorities have intensified mosquito control efforts—including daily insecticide spraying—across high-risk municipalities where severe neurological manifestations of the virus have been reported.
Hotspots in Attica
The municipality of Spata-Artemida—home to the town of Loutraki—has recorded the highest number of cases so far, with 14 confirmed infections. Markopoulo Mesogaias follows closely with 11 cases, while Vari-Voula-Vouliagmeni reports 9. Additional clusters have been identified in Agia Paraskevi (6 cases), Pallini and Chalandri (5 each), and Glyfada (4).
Outbreak Beyond Attica
Elsewhere in the country, Larissa Municipality stands out as the most affected area outside Attica, with 8 cases presenting neurological symptoms. Veria Municipality reports 3 cases. Compared to last year, the situation has deteriorated significantly: as of 19 August 2026, Greece has registered 157 confirmed WNV cases and 13 deaths—surpassing the full-year totals for 2025, which stood at 96 cases and 9 fatalities.
Greece Among Worst-Hit in Europe
Data from the European Centre for Disease Prevention and Control (ECDC) shows WNV activity surging this season across nine European countries. Greece ranks second in case numbers—behind only Italy—highlighting the scale of the regional public health challenge.
Underreporting and Rising Risk
EODY estimates that for every confirmed case, approximately 140 asymptomatic or undiagnosed infections likely go unreported. Given that WNV transmission typically peaks between mid-August and early September, officials warn that case numbers are expected to climb further in the coming weeks.
Geographic Spread
So far, cases have been confirmed across five Greek regions: Attica, Thessaly, Central Macedonia, Peloponnese, and Central Greece. The surge in Attica—particularly in its eastern suburbs—is notably steeper than in previous years.
Public Health Recommendations
To mitigate risk, EODY urges citizens to take consistent protective measures against mosquito bites:
- Use approved insect repellents for skin and indoor spaces—following label instructions carefully;
- Install and maintain window screens and bed nets;
- Use air conditioning or fans indoors;
- Wear long-sleeved clothing and long trousers, especially during dusk and dawn;
- Eliminate all sources of stagnant water around homes and gardens—including flower pots, gutters, and discarded containers;
- Conduct regular inspections of outdoor areas to prevent mosquito breeding.