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Vaccines prevent between 2.5 and 4 million deaths every year.
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Thyroid conditions may make getting pregnant impossible.
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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
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There are 20 feet of blood vessels in each square inch of human skin.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.