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Vaccines prevent between 2.5 and 4 million deaths every year.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.