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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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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.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.