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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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There are 20 feet of blood vessels in each square inch of human skin.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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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.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.