Recent mumps outbreaks in Canada, the United Kingdom, and the United States
| COUNTRY | YEAR | NO. OF CASES | PRIMARY GROUP AFFECTED |
|---|---|---|---|
| Canada | |||
| • British Columbia | 1997 | 83 | Greater Vancouver area outbreak involving mainly youth aged 15 to 24 years14 |
| • Quebec | 1998 | 37 | Montreal area school-based outbreak with an average age of 10 years among those infected 15 |
| • Alberta | 2002 | 193 | Outbreak in an undervaccinated community in northern Alberta following exposure to imported virus from Bolivia5 |
| 2007 | 258 | Part of ongoing 2007 outbreak centred in Alberta4 | |
| • Nova Scotia | 2005 | 32 | Two separate outbreaks among high school and university students, most of whom had received 1- or 2-dose vaccinations against mumps16 |
| 2007 | 777 | Part of ongoing 2007 outbreak centred in the Maritimes4 | |
| United Kingdom | 2004–2005 | 56 390 | Unvaccinated young adults17 |
| United States | 2006 | 6584 | Outbreak in 8 midwestern states (Minnesota, South Dakota, Iowa, Wisconsin, Nebraska, Kansas, Missouri, Illinois) involving university-aged young adults between 18 and 24 years of age, most of whom had received 2 doses of mumps vaccine18 |