Canada communicable disease report = Relevé des maladies transmissibles au Canada
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Can. Commun. Dis. Rep. · Apr 2020
Large community mumps outbreak in Manitoba, Canada, September 2016-December 2018.
After routine mumps immunization programs were implemented in Manitoba in the 1980s, incidence was low, with 0-9 cases of disease annually. In September 2016, a mumps outbreak began in fully vaccinated university students in Winnipeg, Manitoba. ⋯ This prolonged outbreak revealed a large vulnerable population likely resulting from under-vaccination and waning vaccine-induced immunity in the absence of natural boosting from exposure to mumps virus. It is important to maintain high two-dose coverage with mumps-containing vaccines. A third dose of mumps-containing vaccine in future outbreaks may be considered.