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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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There are more sensory neurons in the tongue than in any other part of the body.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.