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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.