A yellow fever injection certificate is necessary for those
travelling from infected areas. Malaria is present in the
southwest, though is very limited. Cholera is a very minor risk,
with no reports in recent years. Hepatitis A and typhoid
immunisation are recommended, though risk is only higher in those
staying for extended periods, with high contact with locals.
Traveller's diarrhoea is fairly common and although tap water is
chlorinated, it is advised to boil or filter it first. Milk is
unpasteurised and should be boiled, and any diary product made from
milk should be avoided. Some types of fish can remain toxic even
after cooking (especially barracuda). Full health insurance is
recommended, and it is advised to carry a doctor's letter if one
has any major disease or special needs. If on medication, bring
enough for the trip, and include a letter explaining its use. A
supply of basic medication is also useful (for headaches, diarrhoea
etc). Bilharzia can occur, and it is best to avoid swimming in
fresh water.