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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.