Countries that require yellow fever vaccination

A country may request vaccination proof because yellow fever can be introduced by an infected traveller and then spread where suitable mosquitoes live. Requirements can depend on the countries visited, airport transit, and whether you are arriving from an area with transmission. Rules can change, and an itinerary with a short connection may matter. Entry documentation is separate from your personal medical protection, so an official requirement does not by itself show how much exposure you will have.

Check the current entry conditions for every destination and transit point, then book a travel-health appointment early enough to discuss vaccination and documentation. Bring your passport details, route, departure date, medical history, allergies, pregnancy plans, and medicines. The yellow fever vaccine is a live attenuated vaccine, so some people need an individual assessment before receiving it. Carry the required certificate with your travel documents and continue using mosquito precautions.

Contact a clinician promptly if you develop fever, severe headache, vomiting, jaundice, bleeding, confusion, or profound weakness during travel or after returning from a risk area. Explain your travel dates and destinations, including transit stops. Seek emergency help for breathing difficulty, collapse, seizures, or rapidly worsening confusion.

Ask whether your itinerary triggers a certificate requirement, whether vaccination is appropriate with your health conditions, when documentation becomes valid, and what to do if an entry rule changes.