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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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There are more sensory neurons in the tongue than in any other part of the body.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.