All water should be regarded as being potentially contaminated. Water used for drinking, brushing teeth or making ice should have first been boiled or otherwise sterilised. Milk is unpasteurised and should be boiled. Powdered or tinned milk is available and is advised. Avoid dairy products which are likely to have been made from unboiled milk. Only eat well-cooked meat and fish, preferably served hot. Vegetables should be cooked and fruit peeled.

Avoid swimming and paddling in fresh water; swimming pools which are well chlorinated and maintained are safe. Vaccinations against tuberculosis and hepatitis B are sometimes recommended.

The island has very basic medical facilities, with one hospital. It is important to carry a basic first aid kit. Health insurance is essential.