Open Outbreak

Yellow fever in Colombia

Pathogen: yellow fever virus · Region: Colombia · Status: monitoring · Tier: elevated · Updated

OfficialMedia, unverifiedReported this week
Deaths—86—
Confirmed cases—255—
Suspected cases—1,183—

Official and media figures describe the same people from different vantage points and are never added together.

Yellow fever activity in Colombia is credible but only partly pinned down in the documents retrieved in this session. Official WHO documents show that Colombia was already a major part of the Americas resurgence: by 2025-04-26, WHO reported 60 confirmed cases and 24 deaths in Colombia in 2025, mostly in Tolima, and by 2026-06-24 WHO said Colombia was the most affected country in the Americas during 2026-01-01 to 2026-05-26. WHO also described the wider regional risk as high, driven by sylvatic transmission, uneven vaccination coverage, competent vectors, and spread into areas outside the Amazon basin. What is contested is the current Colombia total. The only September 2026 event-specific figure retrieved here is an unverified media report that attributes to Colombia’s Instituto Nacional de Salud 58 confirmed cases and 27 deaths in 2026, while also citing 206 confirmed cases and 86 deaths cumulatively in Colombia. Without a directly retrieved Colombian authority bulletin, those two denominators cannot be reconciled here. What to watch: whether Colombian authorities publish an updated national line list or bulletin, whether cases remain confined to sylvatic exposure in Tolima and nearby areas or move toward urban transmission, whether vaccination campaigns are expanded in affected departments, and whether WHO issues a country-specific update for Colombia rather than only regional/global summaries.

This event is concerning because yellow fever is severe, vaccine coverage is uneven, and WHO assessed the regional risk in the Americas as high amid continued sylvatic transmission and spread into unusual areas. The main uncertainty is not whether transmission is real, but the exact current Colombia total, because the latest country figures retrieved here come from an unverified media report rather than a directly retrieved Colombian official bulletin.

Situation as of 21 Sept 2026

Official

WHO officially reported that Colombia had 60 confirmed yellow fever cases and 24 deaths in 2025 as of 2025-04-26, with most cases in Tolima, and later stated that Colombia was the most affected country in the Americas during 2026-01-01 to 2026-05-26. WHO describes the regional risk in the Americas as high because of active sylvatic transmission, uneven vaccination coverage, competent vectors, and spread into areas outside the Amazon basin.

Media, unverified

One unverified media report dated 2026-09-21 says Colombia confirmed 58 yellow fever cases and 27 deaths in 2026, citing Colombia’s Instituto Nacional de Salud. The same report also cites municipality-level counts in Tolima and nearby areas and mentions a CDC Level 2 travel notice.

Control measures

WHO says response measures in the Americas include strengthened surveillance, timely laboratory testing, vaccination, case management, risk communication, and cross-border coordination. The unverified media report also cites a CDC Level 2 travel notice. No Colombia-specific quarantine or internal movement restriction document was retrieved in this session.

Timeline

Latest reports

  1. · pulzo.com · Media, unverified
    Puntos de vacunación contra la fiebre amarilla para adultos mayores y gestantes en Bogotá: cómo consultar y acceder
  2. · teletica.com · Media, unverified
    Sector privado garantiza disponibilidad de vacuna contra fiebre amarilla para viajeros
  3. · medicaldaily.com · Media, unverified
    Colombia Confirms 58 Yellow Fever Cases and 27 Deaths This Year as CDC Posts Level 2 Travel Notice