What should you know about yellow fever countries?

Risk can vary within a country, so a city-only itinerary may need different advice from travel involving rural, forested, or border areas. Airport transit can also matter for entry rules, even when you do not plan to leave the airport. Requirements can change, so use current official travel-health information and confirm details with the destination's relevant authority.

Yellow fever is spread mainly by infected mosquitoes. The purpose of travel planning is to lower the chance of mosquito exposure and to meet any documentation requirements that apply to your route. A clinician can weigh the potential benefit of vaccination against your medical history.

Bring a complete itinerary to a travel-health appointment: every country, region, airport stop, travel date, planned activity, and type of accommodation. Mention pregnancy, immune-system conditions or treatments, severe allergies, and prior vaccine reactions, because these can affect vaccination advice.

Use mosquito-bite prevention alongside any vaccine advice. Repellent, long sleeves and trousers, and well-screened sleeping areas can reduce bites. Keep your travel health documents with your passport and check them again if your route changes.

Arrange same-day medical advice for a fever that develops during travel or after returning from an area with yellow fever risk. Seek urgent help for fever with confusion, bleeding, severe weakness, repeated vomiting, abdominal pain, or yellowing of the skin or eyes. Tell the care team your destinations and dates before they assess possible causes.

Ask which parts of your itinerary carry yellow fever risk, whether a transit stop affects entry requirements, whether vaccination is suitable, and what evidence of vaccination you may need to carry. Ask how to protect children or other travellers in your group from mosquitoes and what to do if your itinerary changes.