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Vaccines prevent between 2.5 and 4 million deaths every year.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.