CDC health alert (level 2) — Yellow Fever (Colombia)
Ongoing alert in Colombia — started September 2, 2025 at 4:00 AM. This page updates as the situation evolves.
What's happening
Yellow fever cases have been confirmed in Colombia, with an affected radius extending approximately 500 kilometers from the initial outbreak area. The CDC has issued a level 2 alert for the country, indicating heightened transmission risk in affected regions.
If you are currently on site, you should be aware that yellow fever is transmitted through mosquito bites, particularly during dawn and dusk hours. Travellers in the affected area face increased exposure risk. Seek immediate medical attention if you develop symptoms such as fever, headache, muscle pain, or jaundice, and inform healthcare providers of your location and travel history.
Follow local health authority guidance and CDC recommendations for your area. Ensure you have appropriate mosquito protection measures in place, including insect repellent, long clothing, and staying in screened or air-conditioned spaces when possible. Consult local health authorities about vaccination eligibility if you have not already done so. This alert is based on information from the CDC travel health division.
Written with the help of AI from Mira Safe's sourced data on August 24, 2026 · does not replace local guidance How this analysis is produced →
How it evolved
Alert raisedHigh
June 28, 2026 at 5:48 PM
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Affected areas
Live safety pages for the places concerned by this alert.
Sources for this alert
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