Did you know?

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 adult has about 21 square feet of skin.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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The average office desk has 400 times more bacteria on it than a toilet.

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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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