Chikungunya mosquito-borne viral fever
Chikungunya mosquito-borne viral fever clinical and global spread profile: 46 countries, 58 WHO outbreak events since 2006.
Chikungunya mosquito-borne viral fever · ICD-10 A920 · ICD-11 1D40 · 58 WHO events across 46 countries (2006–2025).
Top affected countries
| Country | Region | Events | % of global |
|---|---|---|---|
| Kenya | AFR | 3 | 5% |
| France | EUR | 3 | 5% |
| Senegal | AFR | 2 | 3% |
| Italy | EUR | 2 | 3% |
| Bolivia (Plurinational State of) | AMR | 2 | 3% |
| India | SEAR | 2 | 3% |
| Réunion | — | 2 | 3% |
| United States of America | AMR | 2 | 3% |
| Paraguay | AMR | 2 | 3% |
| Argentina | AMR | 2 | 3% |
| Peru | AMR | 1 | 2% |
| Belize | AMR | 1 | 2% |
| Costa Rica | AMR | 1 | 2% |
| Canada | AMR | 1 | 2% |
| Comoros | AFR | 1 | 2% |
Distribution by WHO region
| Region | Events | Share |
|---|---|---|
| AMR | 22 | 38% |
| AFR | 9 | 16% |
| WPR | 7 | 12% |
| EUR | 6 | 10% |
| SEAR | 6 | 10% |
| Unassigned | 5 | 9% |
| EMR | 3 | 5% |
Annual outbreak timeline
| Year | Events | Countries |
|---|---|---|
| 2025 | 38 | 38 |
| 2023 | 5 | 5 |
| 2020 | 1 | 1 |
| 2019 | 1 | 1 |
| 2018 | 2 | 2 |
| 2017 | 2 | 2 |
| 2016 | 3 | 3 |
| 2015 | 2 | 2 |
| 2014 | 1 | 1 |
| 2013 | 1 | 1 |
| 2006 | 2 | 2 |
Peak year: 2025 (38 events).
Decade summary
| Decade | Events |
|---|---|
| 2000s | 2 |
| 2010s | 12 |
| 2020s | 44 |
WHO case definition
Individuals are infected with the virus through a mosquito bite from Aedes mosquitos (Aedes albopictus and A. aegypti). Concomitant fever and arthalgia are a common specific sign although infection can present with non-specific symptoms that can be confused with Dengue including headache, rash and myalgia. Free virions are transported via the blood to the liver (hepatocyte apoptosis), muscle, joints and secondary lymphoid organs (adenopathy), wherein the virus replicates. Viral replication is associated with an infiltration of mononuclear cells including macrophages, which underlies the debilitating pain experienced in the muscles and joints, which can persist for months to years post infection. A small percentage of infected individuals remain asymptomatic, this is more common in patients under 25 years old. Age over 40 years is a risk factor for chronicity of symptoms. Encephalitis, Guillain-Barre sundrome and arthritis are rare complications of infection with Chikungya virus.
Countries Affected
46
Outbreak Events
58
Year Range
2006–2025
ICD-10 A920
Chikungunya mosquito-borne viral fever
Visualization
Global Prevalence Snapshot
Based on WHO Disease Outbreak News events (2006–2025).
Risk Level
Continue exploring
