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Mumps Outbreak 2019

Since January 1, 2019, Utah public health has been investigating an outbreak of mumps in the state - primarily among unvaccinated persons. In response to the outbreak, public health officials have been working to identify cases and contacts, provide education, and ensure opportunities for vaccination of close contacts to cases and vulnerable populations.

Even though the measles, mumps, rubella (MMR) vaccine has drastically reduced mumps cases, outbreaks continue to occur. Outbreaks most commonly occur in places where people have had prolonged, close contact with a person who has mumps, such as attending the same class, playing on the same sports team, or living in the same dormitory.

Mumps is a contagious disease caused by a virus and is spread through saliva or mucus from the mouth, nose, or throat. An infected person can spread the virus by coughing, sneezing, talking, sharing items with others, such as cups or eating utensils, and touching objects or surfaces with unwashed hands that are then touched by others.

The most common symptoms include fever, headache, muscle aches, tiredness, loss of appetite, and swollen and tender salivary glands under the ears on one or both sides (parotitis). Mumps likely spreads before the salivary glands begin to swell and up to five days after the swelling begins. Some people who get mumps have very mild or no symptoms, and often they do not know they have the disease. Symptoms typically appear 16-18 days after infection, but this period can range from 12-25 days after infection. Mumps vaccination is the best way to prevent mumps infections. For more information on mumps, click here.

Last Updated June 03, 2019


Outbreak-Associated Cases* Non Outbreak-Associated Cases** Total
Percent of Total Cases Incidence
per 100,000 Population
Mumps Cases 13 5 18   0.58
Deaths 0 0 0 0.0%  
Age Range 1-39 years 3-41 years      
Median 12 years 26 years 13.5 years    
Male 7 4 11 61.1%  
Female 6 1 7 38.9%  
Status (MMR)
2 doses 1 1 2 11.1%  
1 dose 1 2 3 16.7%  
0 doses 11 1 12 66.7%  
Unknown 0 1 1 5.6%  
Health Jurisdiction          
Central 5 1 6 33.3% 7.54
Davis 0 2 2 11.1% 0.58
Salt Lake County 4 1 5 27.8% 0.44
Southwest Utah 4 0 4 22.2% 1.70
Utah County 0 1 1 5.6% 0.16

*Outbreak-Associated Case: Mumps illness in an individual who meets specific criteria (i.e., symptoms, exposure to infected individuals), and includes one or more of the following criteria: 1) reports association with or is suspected of association with one or more at-risk groups, and/or 2) has a direct or suspected epidemiological link to another outbreak-associated case.
**Non Outbreak-Associated Case: Mumps illness in an individual who: 1) does not report being associated or is not suspected of being associated with an at-risk group, or 2) has no epidemiological link to another outbreak-associated case.

Mumps epi-curve



Utah Department of Health
Bureau of Epidemiology
Fax: 801-538-9913
288 North 1460 West
PO Box 142104
Salt Lake City, Utah 84114-2104

24-Hour Urgent Event & Disease Reporting

1-888-EPI-UTAH (374-8824)

Regular Business Hours:

Monday - Friday
8:00 a.m. - 5:00 p.m.

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