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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Illicit drug use costs the United States approximately $181 billion every year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.