Visitors from countries infected with cholera and yellow fever must produce international certificates of vaccination; this is particularly relevant for those travelling from neighbouring African countries. The UK Department of health recommends vaccinations against Hepatitis A, polio and typhoid. It is essential for visitors to take a course of anti-malaria tablets commencing two weeks before travel. Modern medical services are available in Arusha, Moshi, Dar es Salaam and Nairobi – Kenya.