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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.