The following guidelines should help you stay out of trouble.

Bring Supplies. Potentially useful items include insect repellent, sunblock, adhesive bandages and tape, an elastic bandage, a thermometer, water-purifying chemical or device, and an extra pair of eyeglasses.
Minimize Jet Lag. Travelling across time zones can disrupt your body’s biological rhythm. This can produce daytime fatigue, night time insomnia, headache, and disorientation, which can predispose you to health problems. Set your watch to destination time as soon as you board the plane. Once you’ve arrived, don’t stay inside and don’t take catnaps. Get outdoors into the daylight. Keep a light schedule in the first few days to allow for an adjustment period.
Watch what you drink. In rural areas, even in some parts of Europe, only beer, wine, and canned bottled carbonated beverages are safe to drink. Avoid ice cubes. If you must drink or even brush your teeth with suspect water, boil or purify it.

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