Europe Sees 1,855 West Nile Virus Cases and 141 Deaths in Record Transmission Season
Europe has recorded 1,855 human cases of West Nile virus resulting in 141 fatalities across 18 countries as of early October, according to joint figures from the European Centre for Disease Prevention and Control (ECDC) and the European Food Safety Authority (EFSA). The total marks the most intense transmission season to date, driven by infected mosquitoes spreading the virus into previously unaffected northern regions.
European Union member states account for 1,715 of the total locally acquired infections and 130 of the deaths, figures from an October 7 update show. The count surpasses the ten-year average of 693 cases, while the broader 1,855-case total reported by EFSA includes nations outside the EU bloc. The number of human cases across Europe climbed by 769 since the earlier report in September.
Northern Spread Reaches Belgium and the Netherlands
The virus has expanded its geographic footprint northward. Belgium reported 15 human infections, marking the first locally acquired cases ever recorded in the country, while the Netherlands logged 59 cases this season. ECDC senior expert Céline Gossner noted that the virus circulates between mosquitoes and birds, affecting both humans and horses. Animal surveillance data shows 511 outbreaks in animals of the equine family and 595 outbreaks among birds across 15 European countries.
🚨🇪🇸WEST NILE VIRUS DEATH TOLL IN SPAIN RISES TO 5Fears are rising in Spain as the virus claimed another 2 victims in Coria del Rio.Pablo Barreiro, an expert in infectious diseases:“Only about 2-5% of the cases present symptoms.It's an illness that can go unnoticed very… pic.twitter.com/GowjwUpMa0”
Italy remains the most affected country in Europe with 748 reported cases. Meanwhile, Greece and France registered 445 and 144 cases respectively, both marking the highest numbers of human cases of the virus infection ever, according to the ECDC.
Severity Rates Remain Stable Despite Rising Case Totals
While infection numbers have reached record highs, disease severity has not increased. The ECDC stated that the number of people who died, needed hospitalisation or developed neurological symptoms is the same as in the previous decade. Roughly 80 percent of human West Nile virus infections remain completely asymptomatic, though symptomatic cases can trigger fevers, severe neurological disease, and death.
Ole Heuer, Head of Unit at ECDC, emphasized the need for structural readiness ahead of future seasons. “The occurrence of West Nile virus varies considerably from year to year and is difficult to predict, but what we can do is ensure we’re prepared,” Heuer said, pointing to earlier detection, heightened public awareness, and targeted mosquito control.
Prevention and Treatment Guidance for Affected Regions
No licensed human vaccine exists for the West Nile virus, leaving clinical management limited to supportive care and symptom control in hospital settings for severe cases. To minimize exposure risks, the ECDC advises residents and travelers in active transmission zones to apply mosquito repellent, wear loose-fitting long clothing, and use window screens, mosquito nets, or air conditioning. Protection remains particularly critical for older adults and individuals with weak immune systems.
Frequently Asked Questions About the 2026 West Nile Virus Season
Which European countries are most affected by the virus?
Italy leads the continent with 748 reported cases, followed by Greece with 445 and France with 144. Belgium and the Netherlands have also recorded significant northern spread with 15 and 59 cases respectively.
How does the virus transmit to humans and animals?
The virus spreads through the bite of infected mosquitoes that acquire the pathogen from circulating bird populations. This cycle also impacts horses, with EFSA documenting 511 equine outbreaks across 15 European countries.
What preventive steps reduce infection risks?
The ECDC recommends using mosquito repellent, wearing loose-fitting long clothing, and utilizing window screens, air conditioning, or mosquito nets.
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