Yellow Fever is a serious viral infection spread by infected mosquitoes, primarily found in tropical and subtropical regions of Africa and South America. It is an acute hemorrhagic disease that can cause jaundice, giving it its name, and can be life-threatening.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
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
This event envelope contains reports on yellow fever cases and outbreaks in Bolivia.Yellow fever situation in the Americas
Source: BEACON - View Full Report
Colombia's yellow fever outbreak continues into 2026, with 30 confirmed cases and 11 deaths reported as of March 17, 2026. Three deaths occurred among Bogotá residents who traveled unvaccinated to endemic areas, highlighting critical gaps in pre-travel health preparedness and public awareness of vaccination timing requirements.See also BEACON's related reports on the Yellow fever situation in the Americas.
Source: BEACON - View Full Report
Yellow fever cases in the Americas are emerging in both endemic and previously unaffected regions. This suggests that sylvatic transmission is expanding into montane and transitional forest areas, raising concerns about cross-border spread and the risk of urban reintroduction.Country reportsBoliviaColombiaCosta RicaEcuadorVenezuela
Source: BEACON - View Full Report
Venezuela reports 36 confirmed yellow fever cases across 14 states from June 2025 to January 2026 and extensive epizootic activity in eight states, marking the country's most significant yellow fever event since 2005. The outbreak is part of regional intensification across South America during 2024–2026, with the virus spreading beyond traditional endemic areas to previously low-risk regions. An emergency vaccination campaign targeting four priority states aims to rapidly increase population immunity during the peak transmission season, though coverage gaps and geographic limitations may constrain outbreak control.
Source: BEACON - View Full Report
Trinidad and Tobago confirmed yellow fever virus in a deceased Red Howler monkey on 24 Mar 2026, indicating active sylvatic transmission in forested areas with no human cases reported. The detection aligns with Trinidad's endemic pattern of periodic wildlife epizootics and has triggered enhanced surveillance, vector control measures, and public health advisories targeting occupational risk groups with forest exposure.
Source: BEACON - View Full Report
Track Yellow Fever and 200+ other diseases with personalized alerts
Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →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
Get real-time alerts and intelligence on Yellow Fever and 200+ other diseases. Used by healthcare systems, EMS, schools, and travelers worldwide.