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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.