Dengue Fever
10 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 Outbreak Sweeps Tonga Islands
This event envelope contains reports on dengue in Tonga.
Source: BEACON - View Full Report
Dengue Detected in Swiss Mosquitoes: First Time North of Alps
Dengue virus has been detected in mosquitoes in Switzerland for the first time, marking a geographic expansion north of the Alps into a region with no previous dengue transmission history. This entomological surveillance finding indicates established vector populations are now capable of harboring the virus, raising concerns about potential local transmission.
Source: BEACON - View Full Report
Italy Dengue Cases Surge, Maldives Blamed
This event envelope contains reports on dengue cases and clusters in Italy.
Source: BEACON - View Full Report
Samoa Dengue Outbreak Surges: Thousands Infected, Deaths Reported
Dengue transmission continues in Samoa following the outbreak declared in April 2025, with over 17 400 cases and nine deaths as of 08 Mar 2026. Recent decreases in weekly cases, hospital admissions, and laboratory-confirmed infections suggest short-term stabilization; however, transmission remains widespread, with increasing circulation of DENV-2 alongside DENV-1.
Source: BEACON - View Full Report
Dengue Outbreak in Sudan: Over 600 Cases, Four Dead
This event envelope contains reports on dengue clusters and outbreaks in Sudan.
Source: BEACON - View Full Report
Dengue Outbreak in Tokelau Contained Quickly
This event envelope contains reports on dengue in Tokelau.
Source: BEACON - View Full Report
Dengue Surge Hits Southern Martinique
This event envelope contains reports on dengue clusters and outbreaks in Martinique.
Source: BEACON - View Full Report
Dengue Surges in El Salvador, Hits Children Hard
This event envelope includes reports on dengue in El Salvador.
Source: BEACON - View Full Report
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 Epidemic Strikes New Caledonia: First Since 2019
This event envelope contains reports on dengue clusters and outbreaks in New Caledonia.
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: 2026-04-19
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