CHARLESTON, S.C. (AP) - Three people have tested positive for the mumps virus at the College of Charleston, prompting South Carolina health officials to declare an outbreak.

News outlets report the South Carolina Department of Health and Environmental Control confirmed the first case last week and have since confirmed two additional cases.

A school press release says the three who tested positive have been isolated and those with an increased risk of infection are being notified.

The school says they’re having a vaccination clinic this week.

Students are required to have three vaccines before enrollment including the measles, mumps and rubella vaccine. Students 18 or older may opt out of the vaccine requirement by signing a waiver.

The Post and Courier reports nearly 200 students out of over 12,000 opted out of the requirement.

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