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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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On average, the stomach produces 2 L of hydrochloric acid per day.
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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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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.