West Nile Fever is a viral infection caused by the **West Nile Virus (WNV)**, a flavivirus. It primarily affects humans, horses, and birds, and is most commonly found in North America, Africa, Europe, and parts of Asia. While often mild or asymptomatic, it can sometimes lead to severe neurological illness.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
Real-time intelligence from global health monitoring and AI-powered surveillance
Data sources: BEACON, ProMED, WHO, CDC, and 50+ national health agencies
✓ Live data updated in real-time from global health sources
Regional three Quality Improvement Conference Kicks Off in Lusaka with a Focus on Sustainable Healthcare Delivery. The conference for Lusaka and Eastern Provinces has officially commenced.
Strengthening Health Supply Chains for Zambia. The CIDRZ and DHAPP teams had the honour of accompanying Dr Braden Hale on a visit to review health supply chains.
Track West Nile Fever and 200+ other diseases with personalized alerts
Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-05
Get real-time alerts and intelligence on West Nile Fever and 200+ other diseases. Used by healthcare systems, EMS, schools, and travelers worldwide.