2013 - Monmouth County Outbreak
The New Jersey Department of Health (NJDOH), in conjunction with the Monmouth County Health Department and additional local and county health departments, investigated an outbreak of mumps associated with Belmar, New Jersey. There are 53 outbreak-associated mumps cases in NJ. Cases range in age from 16 to 50, with a median of 27 years of age. Illness onset dates range from 08/03/2013 through 10/12/2013.
Although most individuals involved reported having received age-appropriate vaccinations, dates of vaccination have been difficult to verify. Preliminary immunity data indicate approximately 34% of outbreak-associated cases have some documented proof of mumps immunity. An additional 8 outbreak-associated cases were identified and investigated in 5 other states (MA, NY, PA, SC, WA) and NYC.
The outbreak was declared over as of December 6, 2013, as no new outbreak-associated mumps cases have been identified after two full incubation periods from the last case‚Äôs last day of infectivity. There will be no further updates related to this situation.
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