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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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There are 20 feet of blood vessels in each square inch of human skin.
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When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.
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Your heart beats over 36 million times a year.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.