Communicable Disease Control

Mumps Outbreak Investigation

Summary

Toronto Public Health (TPH) is currently investigating a mumps outbreak in the city that began in January 2017. As of January 1, 2017 to August 16, 2017, there are 93 confirmed cases of mumps in Toronto.

 
  • Most of the cases are among 18 - 35 year old individuals
  • Most of the cases were not fully vaccinated
  • Broader community spread of the mumps is continuing, with most cases linked to west downtown bars

Get vaccinated

Many individuals in their 20's, 30's and 40's (born between 1970 and 1992) have only received one dose of MMR vaccine. A second dose is required for full protection.

If an adult is unsure about their vaccinations or has only received one dose of mumps-containing vaccine, a booster dose is recommended.

Keep your vaccination record

Check your yellow immunization card, ask your health care provider, or contact the public health unit where you went to school to get your vaccination record. Keep your vaccination record safe and accessible.

Watch for symptoms of mumps

The mumps infection causes fever, swelling of one or more salivary glands, loss of appetite, tiredness, and headache. If you or your child have symptoms of the mumps and are ill, please contact your health care provider and do not attend work or school.

Planning to travel?

Ensure that your immunizations are up-to-date for you and all your family members before travelling. Mumps and measles are both spreading in North America, Europe and around the world. The MMR vaccine will protect against both of these infections.

Ensure your child's vaccines are up-to-date

Children receive one dose of MMR vaccine after the first birthday and a second dose (of MMRV) at 4 to 6 years of age as part of Ontario's Publicly Funded Immunization Schedule; check your child's yellow immunization card.

Mumps infection and spread during outbreaks

The mumps virus is found in saliva and respiratory droplets. It is spread from person to person through coughing, sneezing, and coming into contact with a person's saliva by sharing drinks or utensils, food or water bottles, or by kissing. A major factor contributing to outbreaks is being in a crowded environment, such as attending the same class, playing on the same sports team or living in a dormitory with a person who has the mumps.

For more information see Toronto Public Health's mumps fact sheet