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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.