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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Everyone has one nostril that is larger than the other.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.