An alarming rise in West Nile virus cases has been reported across Greece, sparking widespread concern—especially since the mosquitoes that transmit the virus bite repeatedly and indiscriminately. In response to this surge, public health authorities have intensified mosquito control measures, including daily insecticide spraying in affected municipalities.
Current Situation in Greece
According to the Hellenic National Public Health Organization (EODY), Eastern Attica remains the most heavily impacted region. As of August 21, 2026, a total of 157 confirmed human cases have been recorded nationwide. The highest concentrations are found in the municipality of Spata-Artemida (Loutra), with 14 cases; Markopoulo Mesogaias (11); Varkiza-Voula-Vouliagmeni (9); Agia Paraskevi (6); Pallini and Chalandri (5 each); and Glyfada (4).
How the Virus Affects People
As noted by the U.S. Centers for Disease Control and Prevention (CDC) in Atlanta, the West Nile virus causes no symptoms in approximately 80% of infected individuals. In roughly 20% of cases, people develop a mild, flu-like illness known as West Nile fever. Less than 1% progress to severe neuroinvasive disease—a potentially life-threatening condition affecting the central nervous system (CNS), including the brain and spinal cord.
Mild Illness: Symptoms and Timeline
Symptoms of West Nile fever typically appear between 2 and 6 days after being bitten by an infected mosquito—but may take up to 14 days to manifest, particularly in individuals with weakened immune systems. Common signs include:
- Fever and headache
- Body aches (myalgia)
- Joint pain
- Extreme fatigue
- Generalized weakness
- Nausea or diarrhea
- A transient skin rash
Most patients recover fully, though fatigue and weakness can persist for weeks—or even months.
Severe Neuroinvasive Disease: Warning Signs
When the virus invades the CNS, it can trigger meningitis, encephalitis, or acute flaccid paralysis. Symptoms requiring immediate medical attention include:
- Sudden high fever
- Stiff neck
- Confusion or altered mental status
- Seizures
- Loss of coordination or muscle weakness
- Coma
EODY urges citizens—especially older adults and those with chronic illnesses or compromised immunity—to remain vigilant and seek urgent care if any of these neurological symptoms arise.