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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.