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There are 60,000 miles of blood vessels in every adult human.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The average adult has about 21 square feet of skin.
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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.