Mumps outbreak with high complication rates among residents in a university teaching hospital.

According to the US Advisory Committee on Immunization Practices recommendations, only health care personnel (HCP) with adequate evidence of immunity should be exposed to patients with a suspected diagnosis of mumps. Here we report a hospital-outbreak scenario among medical residents with no previous vaccination record against mumps who had a high rate of complications. We also describe the importance and impact of full and proper vaccination, as well as isolation, of HCP in stopping the outbreak and, finally, review opportunities for improving the safety of HCP.