Did you know?

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 horizontal fraction bar was introduced by the Arabs.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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