Dengue Fever
2 Active OutbreaksDengue is a mosquito-borne viral infection that causes flu-like illness and can develop into severe dengue, a potentially lethal complication. It is endemic in more than 100 countries, primarily in tropical and subtropical regions.
Symptoms
- Symptoms vary by disease
- Consult healthcare provider for specific information
Transmission
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
Prevention
- Practice good hygiene
- Follow public health guidance
- Consult healthcare provider for vaccines and preventive measures
Active Outbreaks & Recent Cases
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
Dengue Returns to Chile's Easter Island After 2024
Dengue in Chile is characterized by the absence of autochthonous transmission on the mainland, where all reported cases remain imported, while Easter Island (Rapa Nui) constitutes an endemic focus with recurrent locally acquired infections driven by established Aedes aegypti populations. Since the first documented outbreak in 2002, Easter Island has reported multiple dengue episodes caused by different serotypes (primarily DENV‑1, with DENV‑4 and later DENV‑2 also detected), underscoring the island’s role as Chile’s main locus of dengue transmission and a potential source of virus exportation.
Source: BEACON - View Full Report
Dengue outbreak hits Sri Lanka: 13416 cases reported
Dengue is endemic in Sri Lanka, with cyclical epidemics driven by monsoon seasons and all four DENV serotypes circulating. Annual cases have frequently exceeded 35 000–50 000 over the past decade, peaking at 186 101 in 2017, primarily in the Western Province districts Colombo and Gampaha.
Source: BEACON - View Full Report
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Expert Resources & References
Trusted information from leading health organizations
WHO
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Medically Reviewed Content
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
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