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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.