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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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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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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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People about to have surgery must tell their health care providers about all supplements they take.
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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.