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The horizontal fraction bar was introduced by the Arabs.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.