The Delaware Division of Public Health (DPH) is investigating a mumps outbreak among attendees of a February Hispanic dance festival in New Castle County. Officials have confirmed three cases of the mumps, all involving attendees of a social dance (Baile Mejicano or Mexican Dance) that took place at the Chase Center on the Riverfront in Wilmington on Feb.10, 2018. DPH is recommending that anyone who attended the dance, contact their primary care physician to determine if they may have contracted mumps and if they and their family or close contacts need to receive vaccination against mumps.