[14] Citizens of the following countries and territories must obtain a visa in advance as they require approval of the Commissioner General of Immigration or the Commissioner of Immigration:[3][4][15][16] The same regulation applies to stateless persons and persons with refugee status.
Proof of Yellow fever vaccination is required for all travellers travelling through or from the following countries: Angola, Argentina, Benin, Bolivia, Brazil, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Colombia, Republic of the Congo, Democratic Republic of the Congo, Côte d'Ivoire, Ecuador, Equatorial Guinea, Ethiopia, French Guiana, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Guyana, Kenya, Liberia, Mali, Mauritania, Niger, Nigeria, Panama, Paraguay, Peru, Rwanda, Senegal, Sierra Leone, South Sudan, Sudan, Suriname, Togo, Trinidad and Tobago, Uganda, Venezuela, Zambia.
[17][18] The Tanzanian ministry of health mandates a transit time of more than 12 hours or a disembarkment from the immediate airport area from the above mentioned countries during transit as a possible health threat and requires travelers in such situations to possess Yellow Fever Certificates.
[20] Most visitors arriving in Tanzania were from the following countries of nationality:[21] 1 British Overseas Territories.
2 Azerbaijan, Georgia, Turkey, Kazakhstan, Russia and the partially recognised republics of Abkhazia and South Ossetia each span the conventional boundary between Europe and Asia.