Mumps, which many parents had assumed was a disease of the past, is back.
Last year, a mumps epidemic swept across the United States—5,642 people were infected, most between 18 and 25 years of age.
U.S. News 
REUTERS/Brian Snyder
Why Are We Still Getting Mumps? Maybe We Need Another MMR Vaccine Dose
SHOT CLOCK
The dangerous virus in kids is causing panic again. But don’t blame anti-vaxxer parents for this one.
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