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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 people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Everyone has one nostril that is larger than the other.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).