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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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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).