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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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There are approximately 3 million unintended pregnancies in the United States each year.

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Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

A guinea pig being examined by a veterinary medical officer for general health and pulmonary conditi A guinea pig being examined by a veterinary medical officer for general health and pulmonary conditi
Anthropologist Andrea Wiley (left) investigates the effects of high-altitude living on reproductive Anthropologist Andrea Wiley (left) investigates the effects of high-altitude living on reproductive
Growth Chart for American Girls From Birth Through Age 3 Growth slows from infancy to toddlerhood b Growth Chart for American Girls From Birth Through Age 3 Growth slows from infancy to toddlerhood b
Mental Health in the U.S: Survery Results Mental Health in the U.S: Survery Results
Is there anything in life that is permanent, or is the world constantly changing? Is there anything in life that is permanent, or is the world constantly changing?
Disease: Major environmental health problems Disease: Major environmental health problems
Video: Heart Chambers

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