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Author Question: How many and what fraction of the world's people live in advanced economies? In emerging market and ... (Read 44 times) |
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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 human body produces and destroys 15 million blood cells every second.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."