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How to avoid stomach problems in less developed countries
Boil untreated tap water for 1 minute to kill harmful microorganisms and make drinking safe.
The safest drinks are those that have been boiled, such as coffee or tea. All microorganisms are killed in temps above 200 degrees.
Never add ice to any drink, and don't use tap water to brush your teeth. Stick to bottled beverages, including soft drinks, bottled beer, wine and bottled water, but only if the containers have been brought to you unopened.