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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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People about to have surgery must tell their health care providers about all supplements they take.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.