Yellow fever

1 active outbreak

Confirmed cases

N/A

Deaths

0.0%

Case fatality rate

N/A

Countries affected

Updated: July 13, 2026

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Clinical profile

Pathogen

RNA virus

Flaviviridae

Incubation

3–6 d

CFR (reference)

3–7,5 % (phase toxique : 20–50 %)

R₀ (reference)

2–5

High

Vaccine

Available

YF-Vax / Stamaril (lifelong protection)

Treatment

Supportive care

Transmission

Arthropod vector

WHO factsheet →

Active outbreaks

Global

95 cases· Jun 26, 2026(45d)

→LOW RISK

Outbreak history

2026Venezuela

N/A

2025Americas (regional)

N/A

Countries affected(4)

Cameroon Colombia Nigeria Venezuela

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