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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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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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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.
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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%