West Nile virus infection
West Nile virus infection clinical and global spread profile: 9 countries, 10 WHO outbreak events since 1999.
West Nile virus infection · ICD-10 A923 · ICD-11 1D46 · 10 WHO events across 9 countries (1999–2024).
Top affected countries
| Country | Region | Events | % of global |
|---|---|---|---|
| Israel | EUR | 2 | 20% |
| Russian Federation | EUR | 1 | 10% |
| Albania | EUR | 1 | 10% |
| United States of America | AMR | 1 | 10% |
| Brazil | AMR | 1 | 10% |
| Portugal | EUR | 1 | 10% |
| Greece | EUR | 1 | 10% |
| Barbados | AMR | 1 | 10% |
| Romania | EUR | 1 | 10% |
Annual outbreak timeline
| Year | Events | Countries |
|---|---|---|
| 2024 | 1 | 1 |
| 2015 | 1 | 1 |
| 2014 | 1 | 1 |
| 2011 | 5 | 5 |
| 2000 | 1 | 1 |
| 1999 | 1 | 1 |
Peak year: 2011 (5 events).
Decade summary
| Decade | Events |
|---|---|
| 1990s | 1 |
| 2000s | 1 |
| 2010s | 7 |
| 2020s | 1 |
WHO case definition
A condition caused by an infection with West Nile Virus. This condition is common asymptomatic. This condition may present with fever, headache, stiffness of the neck, stupor, disorientation, coma, tremors, convulsions, muscle weakness, or paralysis. Transmission is through the bite of an infected mosquito. Confirmation is by detection of IgG or IgM anti-West Nile virus antibodies in a serum sample.
Countries Affected
9
Outbreak Events
10
Year Range
1999–2024
ICD-10 A923
West Nile virus infection
Visualization
Global Prevalence Snapshot
Based on WHO Disease Outbreak News events (1999–2024).
Risk Level
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