All water should be regarded as being potentially contaminated and it is best if only boiled water is used for drinking, brushing teeth or making ice. Milk is unpasteurised and should be boiled. It is recommended that one takes powdered or tinned milk as long as it is reconstituted with pure water. Visitors are advised to avoid all dairy products and should eat only well-cooked meat and fish, preferably served hot. Pork, salad and mayonnaise may carry increased risk. Vegetables should be cooked and fruit peeled.