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What you need to know about the U.S. measles outbreak
HEALTH-MEASLES/USA
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Federal health officials attribute this year's outbreak to parents who refuse to vaccinate their children. These parents believe, contrary to scientific evidence, that ingredients in the vaccine can cause autism.

Pictured: A woman opposed to childhood vaccinations takes part in a demonstration after officials in Rockland County, a New York City suburb, banned children not vaccinated against measles from public spaces, in West Nyack, New York, March 28, 2019. REUTERS/Mike Segar