Yellow Fever Belt
The so-called Yellow Fever Belt is the name given to a group of countries in Africa and South America in which there is a realistic chance of contracting yellow fever. If your travel itinerary includes one of these countries, your South African visa application has to include certification that you have been vaccinated against yellow fever at least 10 days before departing on your journey. This is because the yellow fever vaccine only takes effect 10 days after it is administered to your body. If you do not obey the 10-day rule, you can be refused access to South Africa by the immigration officer.
Listed below are the countries that make up the Yellow Fever Belt.
Central African Republic
Democratic Republic of Congo (DRC)
Sao Tome and Principe