West Nile fever

MONDO:0002282

A mosquito-borne viral illness caused by the west nile virus, a flavivirus and endemic to regions of Africa, Asia, and Europe. Common clinical features include headache; fever; maculopapular rash; gastrointestinal symptoms; and lymphadenopathy. meningitis; encephalitis; and myelitis may also occur. The disease may occasionally be fatal or leave survivors with residual neurologic deficits. (From Joynt, Clinical Neurology, 1996, Ch26, p13; Lancet 1998 Sep 5;352(9130):767-71)

Also known as: West Nile virus caused disease or disorder, West Nile virus disease or disorder, West Nile virus infectious disease

4 clinical trials for this condition and its sub-types, 1 tagged with West Nile fever itself.

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Where it sits in the disease tree

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Part of

↑ Vector-borne disease (448) ↑ Flaviviridae infectious disease (97)

Sub-types of West Nile fever

West-Nile encephalitis 1 trial
1 sub-type
- Kunjin virus infectous disease 0 trials

Including sub-types (4) Tagged with West Nile fever (1)

Not yet finished but already full! 1

New west nile vaccine enters first human tests

Vaccine Ongoing

This early-stage trial is testing a new vaccine called HydroVax-001B WNV to see if it is safe and triggers an immune response against West Nile virus, a mosquito-borne disease. About 30 healthy adults aged 18 to 49 will receive either the vaccine or a placebo. The study will comp…

Phase 1 • Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Vaccine

Last updated Sep 20, 2026 00:00 UTC

West Nile fever

Where it sits in the disease tree

New west nile vaccine enters first human tests