Mumps Infection With Symptoms of Parotitis, Pancreatitis, and Orchitis Concurrently in an Adolescent Male.

Mumps is a highly contagious childhood infectious disease caused by the mumps virus. Clinical symptoms of mumps infection among vaccinated young adults are rarely seen. We present an unusual case of a vaccinated young male who presented with a clinical picture suggestive of mumps infection with symptoms of parotitis, pancreatitis, and orchitis. The waning of vaccine-induced immunity and low efficacy of the mumps component of the measles, mumps, and rubella (MMR) vaccine could be the reasons for the same. Our patient was managed with supportive measures for the complications and made an uneventful recovery. It has been postulated that antigenic differences between the vaccine and strain-causing illness may result in a deficient immune response conferred by the vaccine. This case highlights the concerns regarding the effectiveness of the live attenuated vaccine currently in use.