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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.