Mumps General Info

Mumps is a viral illness transmitted by respiratory droplets and saliva. Incubation period ranges from 12-25 days. 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). Infected individuals are typically contagious two days prior to parotitis onset until five days after. The most common complication in the post-vaccine era is orchitis.  Less common side effects include mastitis, oophoritis, pancreatitis, deafness, meningitis, and encephalitis.

Two doses of MMR vaccine do not provide 100% protection against mumps; one dose is about 78% effective and two doses are about 88% effective.


Mumps RT-PCR by buccal swab (offered by commercial labs) is optimal for diagnosis.  Since April 2018, CDPH is recommending that if providers suspect mumps, they collect 2 parotid gland duct swabs and a urine sample. One buccal swab should be sent to a commercial laboratory for mumps RT-PCR diagnostic testing and the other buccal swab and urine should be stored at 4°C (or -70°C if possible) to ship to IDPH for additional testing after CDPH consultation.  See 3/16/18 HAN alert for additional specimen collection instructions.


Mumps Reporting

Suspect Cases should be reported within 24 hours.  

Do not wait for laboratory confirmation.

Complete the : Mumps Case Report Form
Fax Form To: (312) - 746-6388
Questions: (312) - 743-9000

Sign up for electronic reporting through the

Illinois National Electronic Disease & Surveillance System (I-NEDSS)

Mumps Contact Us

For Questions Contact:


For Surveillance Questions Contact:

Enrique Ramirez, VPD epidemiologist


For questions during non-business hours call 311. (312-744-5000 if outside the City of Chicago.)

Reporting:  Suspect Cases should be reported within 24 Hours.  Do not wait for laboratory confirmation.