Illinois Department of Public Health is monitoring a mumps outbreak from January 2017 to present.
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Mumps is an acute infectious viral disease that can cause swelling and tenderness of the salivary glands in the cheeks and jaw.
One dose of mumps vaccine, given in combination with measles and rubella (called MMR), is recommended for all children at 12 to 15 months and a second dose at 4 to 6 years of age. The vaccine usually produces life-long immunity.