A new study says that most college students sickened during a 2006 mumps outbreak had been vaccinated against the disease.
The study raises questions about whether another booster shot is
needed -- or perhaps even a new vaccine.
The 2006 outbreak was the biggest in the U.S. since before
states began requiring a second mumps shot in 1990. Nearly 7,000
people contracted the mumps, mostly in eight Midwest states.
The hardest-hit group was college students ages 18 to 24. A
Centers for Disease Control and Prevention study found that, of
those who knew their vaccination history, 84 percent had had two
mumps shots. That was a surprise to public health experts, who
hadn't expected immunity to wane so soon, if at all.
The study is published in Thursday's New England Journal of
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