The outbreak of mumps in central Ohio has more than quadrupled in recent weeks.

According to health authorities, the major increase in cases is happening on the campus of Ohio State University.

The Columbus Health Department reports four people have been hospitalized during the outbreak and at least 93 students or staff connected to the school have been infected with the virus.

Three of the people infected in the outbreak have been confirmed to have never received a vaccination for the mumps.

“If even one person is unvaccinated we are all at risk,” Jose Rodriguez of the Columbus health department told FoxNews.  Rodriguez added that even with vaccinations, up to 20 percent of the population is vulnerable to the mumps virus.

One of the cases reportedly is severe enough that the patient could lose their hearing.  In addition, four cases of orchitis have developed from the infection.

Last year in Franklin County, which includes Columbus, only one case of mumps had been reported.