The number of reported cases of mumps at NIU has increased to 10, according to an email from DeKalb County Health Department and NIU officials.

The group of people who have tested positive for the disease has been contained to an area on campus and will receive vaccinations to slow the disease’s spread, according to the email. A large-scale vaccination will not be conducted.

“The vast majority of the students, faculty and staff should be protected after receiving two doses of the measles, mumps, rubella vaccine during childhood,” the email reads.

Mumps is an acute infectious viral disease that can cause swelling and tenderness of the salivary glands in the cheeks and jaw, according to the Illinois Department of Health website. The disease can affect people of any age and vaccination status, according to the website.

The virus spreads through coughing, sneezing and direct contact with saliva nose discharges from infected people.

Contact the DeKalb County Health Department at (815) 758-6673 or for more information about the disease.