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Sixty-four cases of measles have been diagnosed in the United States this year, the most in seven years, according to the Center for Disease Control and Prevention.

In all but one of the cases, the people who contracted measles had not been vaccinated. Some were too young to have gotten the shots, which are administered from 12 to 15 months of age.

The CDC released the statistics Thursday to "serve as a reminder that measles can and still does occur in the U.S. Ongoing measles virus transmission was declared eliminated in the U.S. in 2000, but the risk of cases and outbreaks from imported disease remains," the organization said in a news release. Interactive: More about measles Read full article »