The bulk of Iowa's jump in mumps cases has been reported at the University of Iowa campus in Iowa City.
The state Public Health Department says 50 cases of mumps have been reported in Iowa this year — 30 of them on the University of Iowa campus.
The state usually has 10 to 20 reported cases a year, but there have been outbreaks, including hundreds of cases in 2006. Doctors say most of the current cases involve students who had met the university's vaccination requirements.
The viral infections symptoms include swollen salivary glands, fever and muscle aches. It spreads easily in confined spaces.