First West Nile virus case of 2026 detected in Athens suburb as Greece braces for mosquito season
The National Public Health Organization reported the season's first West Nile virus infection, a case of meningoencephalitis in a person over 60 years old in Agia Paraskevi, northern Athens.
The case
Greece recorded its first West Nile virus infection of the 2026 transmission period, according to the National Public Health Organization (EODY). The case involves a meningoencephalitis patient over 60 years old, with symptom onset in late June 2026. The probable exposure site is the Northern Sector of Athens, specifically the municipality of Agia Paraskevi.
Background
West Nile virus cases appear annually in many European countries during summer and autumn. Greece has documented infections every year since 2010, making seasonal cases expected. In May 2026, EODY alerted health professionals nationwide and issued public guidance on mosquito precautions.
Transmission and symptoms
The virus spreads primarily through bites from common mosquitoes that have fed on infected wild birds. Humans cannot transmit the virus to other mosquitoes or people. Most infections are asymptomatic or cause mild illness; severe neuroinvasive disease, such as encephalitis or meningitis, occurs in less than 1% of cases. Older age, immunosuppression, and chronic medical conditions are key risk factors for serious complications.
Protective measures
EODY advises consistent use of personal protective measures across the country during the mosquito season. Recommendations include applying approved insect repellents, using window screens and bed nets, wearing long-sleeved clothing, and eliminating standing water to curb mosquito breeding sites.
