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This is Scientific American 60-Second Health. I'm Wayt Gibbs. Got a minute?

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As any new parent knows, vaccines are a pain in the tuchus, and not just for the infant.

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A baby born in the U.S.today is supposed to get 20 shots by the age of two.

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Unsurprisingly, many parents put it off.

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What is surprising is why:

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in a 2011 survey by the Centers for Disease Control and Prevention, 82% of parents who didn't vaccinate their children on schedule cited worries about side effects, like learning or behavioral problems.

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So the CDC commissioned a big study to look at this question.

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Researchers gathered vaccination records and ran a wide range of tests on more than a thousand 7- to 10-year-olds.

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The scientists then searched for any sign that fully vaccinated kids had an elevated risk of cognitive deficits, tics, speech impediments, learning disability or issues with attention or executive function.

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The results were clear: there was no measurable increase in risk for any of these conditions among children who got vaccinated on schedule.

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The study is in the journal Pharmacoepidemiology and Drug Safety.

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This good news should ease some of the anxiety from those visits to the pediatrician,

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unless, of course, you're the one getting stuck.

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Thanks for the minute, for Scientific American's 60-Second Health. I'm Wayt Gibbs.

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