There are 60,000 miles of blood vessels in every adult human.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
Manganese helps Deinococcus radiodurans to avoid radiation damage.