West Nile Virus Cases Surge in Greece, Prompting Health Warnings in Athens

Greek health authorities have placed the country on high alert following a significant surge in West Nile virus infections, with the Attica region surrounding Athens emerging as a primary epicenter of transmission for the 2026 season. According to the National Public Health Organization (EODY), 45 new cases were documented in a single week, bringing the total number of infections nationwide to 110 since the start of the season.

The outbreak has severely impacted populations, with 81 patients developing serious central nervous system complications. EODY confirmed nine fatalities linked to the virus, all involving individuals over the age of 65. In response to the transmission rate, regional authorities in Athens have scaled up mosquito eradication efforts, deploying expanded aerial and ground spraying protocols across affected regional units.

Public health officials across Europe are closely monitoring the trajectory of the outbreak. Data from the World Health Organization (WHO) highlights Greece as recording the sharpest recent upward trend in human cases across the continent, prompting international calls for heightened surveillance and enhanced personal protection measures as peak mosquito season unfolds.

Epidemiological Impact and Regional Epicenters in Attica

The transmission dynamics of the West Nile virus are proving particularly intense within the Attica region. EODY reports that the virus is actively circulating across some zones and regional units. Among the 110 confirmed cases recorded this season, 81 patients have suffered severe central nervous system complications, such as encephalitis or meningitis, according to who.int, requiring intensive inpatient care.

All nine recorded fatalities have occurred among patients aged 65 and older. Regional governor Nikos Hardalias announced an escalation in vector control operations in response to the EODY warnings. Authorities have ramped up targeted mosquito-fighting actions by 30 percent, intensifying both terrestrial and aerial insecticide spraying across the region to suppress vector populations.

Broader European Context and WHO Surveillance

Greece’s surge is part of a broader continental pattern identified by international health bodies. In late July, the World Health Organization reported that WHO/Europe monitors rising West Nile virus cases across parts of Europe, noting that Greece has experienced the most pronounced recent increase in confirmed human infections. WHO/Europe regional director Dr. Hans Henri P. Kluge warned that rising temperatures and longer summers provide mosquitoes with expanded windows for transmission.

While the virus is circulating intensively in Greece, other European nations are also reporting autochthonous cases. Italy has recorded widespread geographic propagation with cases identified across 17 regions, while Spain, North Macedonia, and Romania have confirmed human infections. Epidemiologists at who.int emphasize that approximately one out of every 150 people infected with the virus suffers from a severe infection touching the central nervous system, making early detection and environmental management critical.

Transmission Pathways and Clinical Guidance

The West Nile virus is primarily transmitted to humans through the bite of an infected mosquito, which acquires the pathogen by feeding on infected birds. While rare instances of transmission via organ transplantation, blood transfusions, pregnancy, or breastfeeding have been documented, the virus does not spread through casual human-to-human contact. The transmission season in Europe typically spans from late spring through autumn, with peak activity occurring between July and September.

Because there is currently no licensed human vaccine or specific antiviral treatment available, medical management focuses strictly on supportive care and symptom relief for hospitalized patients. EODY and the WHO recommend that residents and travelers in affected zones implement preventative measures:

• Wear light clothing that covers most of the body, including long sleeves and pants.
• Limit outdoor activities during peak mosquito feeding times at dawn and dusk.
• Install mosquito nets at doors and windows to keep mosquitoes out of the house.
• Apply approved insect repellents carefully, following manufacturer instructions for children and adults.
• Eliminate standing water around the house to destroy breeding sites.

Health authorities advise anyone experiencing symptoms—such as high fever, a skin rash, or neck stiffness following a mosquito bite—to seek immediate medical evaluation.

Public health agencies will continue to release updated surveillance data as vector control operations proceed across Athens and surrounding regions. Readers are encouraged to share this report and monitor official EODY bulletins for ongoing safety advisories.