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Medication errors are more common among seriously ill patients than with those with minor conditions.
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People about to have surgery must tell their health care providers about all supplements they take.
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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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Everyone has one nostril that is larger than the other.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.