In 2009, Toronto saw a record number of mumps cases with 33 (27 confirmed and 6 probable) for the entire year; however, that dubious record appears to be in jeopardy. Through Thursday, 31 confirmed cases of mumps have been reported in the city, according to Toronto Public Health (TPH).


Mumps for the most part has been a blip in Toronto with an average 11 cases reported per year for the 11-year-period from 2005-2015. In fact, in 2015 no cases were reported.

Toronto also accounts for three-quarters of the cases in Ontario province.

The outbreak has been centered around adults who gone to bars in parts of the city’s west end, although the virus is now being seen in Toronto’s schools with four cases seen in staff or students.

Toronto is not alone in Canada in battling mumps this year. Manitoba has been hardest hit with 192 confirmed cases of mumps since Sept. 1, the highest number seen in 20 years.

On Mar. 1, the Chief Public Health Officer of the Public Health Agency of Canada, Dr. Theresa Tam said the following in a statement:

“Several outbreaks of mumps have been confirmed across Canada and are being investigated by local public health authorities. In light of this, I want to remind Canadians of the importance of getting vaccinated and the steps you can take to help prevent the spread of this disease.

“Thanks to vaccination programs throughout Canada, mumps is no longer a common childhood disease. In fact, there has been a 99% reduction in the number of cases reported since the introduction of routine vaccinations against mumps. But, as the past few months have shown us, outbreaks of mumps continue to occur in Canada, mostly in young adults.”

Of the 31 cases, seven were fully immunized (have received two doses of mumps containing vaccine) and 24 received either one dose, no doses or unknown doses of the mumps containing vaccine.