- Case counts (2016-2025), population estimates (2016-2023), & population projections (2024-2025): Public Health Ontario.
- Query: Case counts of reportable diseases by public health unit and year. Toronto, ON: Ontario Agency for Health Protection and Promotion; extracted on March 9, 2026.
Mumps
Mumps is an infection caused by a virus. It is contagious and spreads easily through the air when an infected person coughs or sneezes. The mumps vaccine is the best way to prevent it. Most people fully recover from mumps completely in a few weeks. However, mumps can be serious and cause complications like hearing loss, miscarriage, or swelling of the reproductive organs, brain and the tissue that covers the brain and spinal cord.
Local Information
2025 Statistics
Incidence rate is the number of new cases of disease divided by the number of persons at risk for the disease during a particular time period.
Cases:
0*
Incidence rate per 100,000 in 2025: 0
*Includes confirmed and probable cases in 2025.
Incidence rate per 100,000 of mumps by year
Report to the Health Unit within one business day by fax (705-482-0670) or phone at 705-474-1400 or toll free at 1-800-563-2808, ext. 5229 if mumps is suspected or confirmed as per Ontario Regulation 135/18 and amendments under the Health Protection and Promotion Act, R.S.O., c.H.7.
Should one go to childcare, school, or work if they have mumps?
Exclude from childcare, school, work, or group activities for five days after parotid (salivary glands located between the ear and jaw) swelling appears.
Follow the direction of your healthcare provider, public health case manager, or occupational health at your workplace.
Mumps is preventable by vaccination. Check your vaccination records or call the Vaccine Preventable Diseases program at 705-474-1400 or toll free at 1-800-563-2808, ext. 5252 to book a vaccination appointment or to obtain additional information.
Healthcare provider information
Public Health Agency of Canada
Infection prevention and control
In healthcare settings, droplet precautions must continue for five days after the onset of swelling.
Public Health Ontario
Post-exposure prophylaxis (PEP)
Post-exposure prophylaxis with mumps immune globulin (Ig) is ineffective. Assessment of immunization status and immunization with a mumps-containing vaccine as appropriate for age and risk factors should be conducted for susceptible contacts. Although mumps immunization after exposure to mumps may not prevent the disease, should the exposure not result in infection, the vaccine will confer protection against future exposures.
Contacts include:
- Household members of the case
- Persons who share sleeping arrangements with the case, including sharing rooms (example: dormitories)
- Persons who had direct contact with the oral/nasal secretions of the case
- Children and staff in childcare and school facilities
- Healthcare workers who provided care within one metre of the case without the appropriate personal protective equipment
Susceptible contacts are any person who meets the contact definition above who:
- Are born in Canada in 1970 or later who have not received two doses of mumps-containing vaccine (at least 4 weeks apart) on or after their first birthday
- Do not have a history of laboratory confirmed mumps
- Do not have documented immunity to mumps
Public Health Agency of Canada
Public Health Ontario
Ministry of Health - Ontario Public Health Standards
Contact our Communicable Disease Control (CDC) program at 705-474-1400 or toll free at 1-800-563-2808, ext. 5229, or by email to cdc@healthunit.ca for more information.
Last updated: July 2026, by CDC