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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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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.