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Post Date:02/27/2019 10:25 AM

Contact Keri Zaleski
(815)-334-4456; cell (815)-236-3238

WOODSTOCK IL – The McHenry County Department of Health (MCDH) reports that eight (8) cases of mumps have been identified at two locations in McHenry County.  MCDH is actively investigating the cases; it has not yet been determined whether or not the two locations are related at this time.

An outbreak has been identified at a Crystal Lake church with a total of six (6) positive cases.  Two (2) cases of mumps have been identified at the McHenry County Correctional Facility with other suspect cases pending.  Both individuals have been in the correctional facility during their infectious period.  MCDH is working closely with the Illinois Department of Health (IDPH), McHenry County Correctional Facility, and the Crystal Lake church in investigating all cases. Guidance and recommendations are being provided specific to each location, including identifying close contacts and determining their immunity status; requiring exposed people without immunity to stay home; and encouraging vaccination.   Individuals who have mumps or are symptomatic (pending testing) are being isolated until they are no longer infectious.

If you think you may have been exposed to mumps and/or are experiencing symptoms, contact your healthcare provider.  Healthcare providers throughout McHenry County and the surrounding areas have been notified of these cases.

According to Susan Karras, RN, Director of Public Health Nursing for MCDH “Mumps is a contagious viral disease that spreads through saliva or mucus from the mouth, nose, or throat when infected people cough or sneeze.  Sharing food or utensils also spreads the disease.”  Karras added, “Mumps usually starts with fever, headache, muscle aches, tiredness, and loss of appetite. Then most people experience a swelling of their salivary glands, which causes puffy cheeks and a tender, swollen jaw.  Symptoms usually appear 16-18 days after infection, but this period can range from 12-25 days.  Persons with mumps should stay home until at least five (5) days after symptoms appear.  Most people with mumps recover completely in a few weeks.”

Mumps is a vaccine-preventable illness.  Vaccinated children and adults can occasionally become infected with mumps; however, disease is less likely to be severe. MCDH encourages children and adults to be current with their immunizations.  Children should receive the first dose of mumps-containing vaccine, MMR, at 12 to 15 months, and the second dose at four to six years.  All adults born during or after 1957 should have one (1) dose of MMR.  Adults at higher risk, such as university students, healthcare personnel, international travelers, and persons with potential mumps outbreak exposure should have documentation of two (2) doses of mumps vaccine or other proof of immunity to mumps.  Persons born before 1957 are thought to be immune, since they were likely infected naturally. 

According to the Centers for Disease Control and Prevention (CDC), in recent years outbreaks have occurred in schools, colleges, and camps.  For more information, log onto or or call the MCDH Communicable Disease Program at 815-334-4500.


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