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Yellow Fever

Mosquito-borne virus

Transmitted by Aedes and Haemagogus mosquitoes in tropical regions of Africa and South America.

Risk to travelers

High

Vaccine

Single dose

Global risk map

Risk level

High risk

Moderate risk

Low risk

No risk

Risk levels reflect overall risk for travelers and may vary by season and location.

🧬Transmission

Aedes / Haemagogus mosquitoes

⏱️Incubation

3–6 days

📅Seasonality

Year-round in endemic zones

💉Vaccine

Single dose · lifelong · entry cert

Risk by destination · top 6 of 47

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