(CNN) Sixteen cases of mumps have been reported by Temple University, according to Christopher Vito, associate director of public relations at Temple. He said 10 of those are confirmed, six are probable and one additional case is under investigation.

The university, based in Philadelphia, first reported cases of the contagious illness on February 28 but did not say how many people were infected.

Mumps is a vaccine-preventable disease that is caused by a virus. It is spread through saliva or mucus by coughing, sneezing or talking, sharing eating utensils or cups, according to the US Centers for Disease Control and Prevention. It can also spread when an infected person touches items or surfaces that are then touched by someone else who picks up the virus.

Outbreaks usually occur among people who have close contact, such as on college campuses and among sports teams.

Symptoms can appear 12 to 25 days after a person is infected and can include fever, headache, muscle aches, being tired and loss of appetite. The hallmark, though, is swollen glands under the ears that are tender. But not everyone has symptoms, especially if they are experiencing a mild case of the illness.

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