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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.