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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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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Medication errors are three times higher among children and infants than with adults.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.