Background: Mumps is an acute viral infection characterized by parotitis and orchitis and was a leading cause of aseptic meningitis and deafness before vaccine introduction. Reported incidence of mumps was 50-241/100,000 before vaccine licensure. By 2005, there was a 99% reduction in mumps incidence. In 2006, a major resurgence occurred in the
Objectives: To describe the current status of the resulting mumps outbreak in NYC.
Methods: Surveillance and investigation of mumps cases in NYC was conducted in accordance with CDC surveillance manual protocols including laboratory testing for mumps IgM and IgG serology, PCR and culture.
Results: The index camp case had onset of disease on June 28, 2009 after returning from
Conclusions:Mumps transmission has been sustained despite high levels of vaccination among cases. Factors contributing to ongoing transmission, such as population density and behavioral factors, are being investigated. Addressing the limits of mumps vaccine efficacy may be needed to achieve mumps elimination.