UNDATED (CNN) -- U.S. health officials are dealing with an outbreak of mumps.
The Centers for Disease Control says the U.S. has been hit with the most mumps cases in a decade. Mumps is a contagious disease caused by a virus spread through saliva and mucus. As of Nov. 5, here are more than 2,800 cases. Outbreaks in two states are behind many of the cases. Arkansas has 1,870 and Iowa has 683 cases.
Four other states: Indiana, Illinois, Massachusetts and Oklahoma have also reported more than 100 cases this year. Several university campuses have also been implicated in these outbreaks.