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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.