Mumps Outbreak Investigation
The Toronto Mumps Outbreak is officially declared over. The mumps outbreak was from January 2017 to February 2018, during which time, Toronto had over 140 cases of mumps. Toronto usually has 5 cases of mumps per year. This is the largest mumps outbreak in Toronto in over 20 years. More than half of the cases had an acquisition or transmission exposure at a local Toronto bar. 80% of the cases were aged 18-35 years of age and about 75% were not up-to-date in their vaccinations.
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.