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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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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.
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![A) Male body louse. (Courtesy of the Centers for Disease Control and Prevention/Frank Collins, Ph.D. ...](https://biology-forums.com/gallery/30/medium_548020_08_06_17_5_45_50_30510571.jpeg)