As Zanzibar is situated in a malaria zone, it is recommended that you consult your physician on the correct preventative medication required before you travel.
Health recommendation: CDC does not recommend yellow fever vaccine for most travelers to Tanzania.
However, you might consider this vaccine if you are staying a long time or will be heavily exposed to mosquitoes.
Country entry requirement: The government of Tanzania requires proof of yellow fever vaccination upon arrival if you are traveling from a country with risk of yellow fever.
A Yellow Fever vaccination certificate is only required for travellers coming from – or who are in airport transit for more than 12 hours within – a country with risk of Yellow Fever transmission.* The vaccination requirement is imposed by this country for protection against Yellow Fever since the principal mosquito vector Aedes aegypti is present in its territory.
Children: A vaccination certificate is required for children over 1 year of age.
* RECOMMENDATION: Travellers to Tanzania should take meticulous anti-mosquito bite measures during the daytime.
Risk of Yellow Fever transmission exists in these countries:
AFRICA - Angola, Benin, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Republic of the Congo, Democratic Republic of the Congo, Côte d'Ivoire, Equatorial Guinea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, South Sudan, Sudan, Togo, Uganda.
AMERICAS - Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, Venezuela.