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Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Medication errors are more common among seriously ill patients than with those with minor conditions.