Central Ohio health officials say there are now 278 mumps cases reported in Central Ohio.
Of those cases, 165 have been linked to The Ohio State University outbreak.
The outbreak now has more than half as many mumps cases as there were nationwide last year.
State and local health officials are urging residents to make sure they're properly vaccinated with two doses of measles-mumps-rubella, known as MMR.
Mumps often starts with fever, fatigue and body aches.
Those infected are urged to stay home for a few days, cover their mouths and noses when coughing or sneezing, and frequently wash their hands.