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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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Blood is approximately twice as thick as water because of the cells and other components found in it.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

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