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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Medication errors are three times higher among children and infants than with adults.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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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.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.