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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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People about to have surgery must tell their health care providers about all supplements they take.
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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.
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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.