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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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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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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.