Is yellow fever vaccination required for African trip?

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The mosquito-borne virus infects around 200,000 people worldwide each year (Getty)

Q My son will shortly be travelling to Zambia with his girlfriend, and although they hadn’t needed a vaccination for yellow fever to get into Zambia from the UK, they are nipping into Botswana for two days and the question has arisen as to whether they will need to produce evidence of this vaccination to get into Botswana from Zambia. They are aware that there is a yellow fever risk in some areas of Zambia (which they are not visiting), and are now unsure as to how they stand on this. It is proving difficult to get a clear answer.

Lois S

A While your son and his girlfriend should consult either their GP or a specialist travel medicine service, I can gladly offer some background.