Measles and Rubella Weekly Monitoring Report: Week 5 (January 26 to February 1, 2025)
Date published: February 14, 2025
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Key Points
- In Canada, 44 measles cases and 0 rubella cases have been reported in 2025Footnote 1.
- 17 new measles cases were reported by 2 jurisdictions (Ontario, Quebec) in week 5.
- Canadians travelling outside of Canada are encouraged to consult the travel health notices for information on measles outbreaks occurring in other countries.
Measles
Current measles situation
- In week 5 (January 26 - February 1), 17 new measles cases were reported by 2 jurisdictions (Ontario, Quebec). Additionally, 2 new probable cases were reported by 1 jurisdiction (Ontario) associated with an outbreak. Please note, all subsequent sections of the report only include information on confirmed cases.
- To date in 2025Footnote 1, 44 confirmed measles cases have been reported by 2 jurisdictions (Ontario, Quebec).
Figure 1 - Text description
| Province or territory | Number of cases |
|---|---|
| Alberta | 0 |
| British Columbia | 0 |
| Manitoba | 0 |
| New Brunswick | 0 |
| Newfoundland and Labrador | 0 |
| Northwest Territories | 0 |
| Nova Scotia | 0 |
| Nunavut | 0 |
| Ontario | 31 |
| Prince Edward Island | 0 |
| Quebec | 13 |
| Saskatchewan | 0 |
| Yukon | 0 |
| Region | New cases in week 5 | Total cases in 2025Footnote 1 | Epidemiological weekFootnote 2 of last rash onset |
|---|---|---|---|
| Canada | 17 | 44 | Week 5 (January 26 - February 1) |
| Ontario | 16 | 31 | Week 5 (January 26 - February 1) |
| Quebec | 1 | 13 | Week 5 (January 26 - February 1) |
Figure 2 - Text description
| Epidemiological week Footnote 2 of rash onset | Exposed outside of Canada | Exposed in Canada, epidemiologically and/or virologically linked | Unknown exposure |
|---|---|---|---|
| 1 | 0 | 5 | 0 |
| 2 | 0 | 3 | 0 |
| 3 | 0 | 8 | 0 |
| 4 | 1 | 13 | 0 |
| 5 | 0 | 14 | 0 |
| Case characteristics | Count |
|---|---|
| Total number of cases | N=44 |
| Age group | |
| <1 years | 5 (11%) |
| 1 to 4 years | 6 (14%) |
| 5 to 17 years | 16 (36%) |
| 18 to 54 years | 17 (39%) |
| Born before 1970 (≥ 55 years) | 0 (0%) |
| Sex | |
| Male | 28 (64%) |
| Female | 16 (36%) |
| Other/unspecified | 0 (0%) |
| Province or territory | |
| Ontario | 31 (70%) |
| Quebec | 13 (30%) |
| Exposure sourceFootnote 4 | |
| Exposed outside of CanadaTable 2 reference a | 1 (2%) |
| Exposed in Canada, epidemiologically and/or virologically linked | 43 (98%) |
| Unknown exposure | 0 (0%) |
| Vaccination status | |
| Unvaccinated | 29 (66%) |
| 1 dose | 3 (7%) |
| 2 or more doses | 8 (18%) |
| Unknown | 4 (9%) |
| Genotypes | |
| B3 | 0 (0%) |
| D8 | 20 (45%) |
| Undetermined | 7 (16%) |
| Pending | 17 (39%) |
| Hospitalizations | 4 (9%) |
|
|
Historical measles cases
Measles has been eliminated in Canada since 1998, and therefore endemic transmission no longer takes place in the country. However, cases continue to occur sporadically, usually due to importation from regions where measles is circulating. Some imported cases result in time-limited outbreaks. From 1998 to 2024, there have been an average of 91 measles cases reported in Canada annually, with between 0 and 751 cases reported each year.
Figure 3 - Text description
| Year | Number of cases |
|---|---|
| 1998 | 17 |
| 1999 | 32 |
| 2000 | 207 |
| 2001 | 38 |
| 2002 | 9 |
| 2003 | 17 |
| 2004 | 9 |
| 2005 | 8 |
| 2006 | 13 |
| 2007 | 101 |
| 2008 | 61 |
| 2009 | 14 |
| 2010 | 99 |
| 2011 | 751 |
| 2012 | 10 |
| 2013 | 83 |
| 2014 | 418 |
| 2015 | 196 |
| 2016 | 11 |
| 2017 | 45 |
| 2018 | 29 |
| 2019 | 113 |
| 2020 | 1 |
| 2021 | 0 |
| 2022 | 3 |
| 2023 | 12 |
| 2024 | 147 |
| 2025 | 43 |
Rubella and congenital rubella syndrome/infection (CRS/CRI)
- In week 5 (January 26 - February 1), no new rubella or CRS/CRI cases were reported in Canada.
- No rubella or CRS/CRI cases have been reported in 2025.
Data source
Related links
- Measles: For health professionals
- Measles vaccines: Canadian Immunization Guide
- Measles national case definition
- Provincial and territorial measles situation
- Rubella: For health professionals
- Rubella vaccines: Canadian Immunization Guide
- Rubella national case definition
Footnotes
- Footnote 1
-
Total measles case count for 2025 includes 1 case with rash onset in 2024, but occurring in epidemiological week 1, 2025 (December 29, 2024 - January 4, 2025).
- Footnote 2
-
Table 3. Epidemiological week number and corresponding dates for 2025 Epidemiological week number Week start date Week end date 1 December 29, 2024 January 4, 2025 2 January 5, 2025 January 11, 2025 3 January 12, 2025 January 18, 2025 4 January 19, 2025 January 25, 2025 5 January 26, 2025 February 1, 2025 6 February 2, 2025 February 8, 2025 7 February 9, 2025 February 15, 2025 8 February 16, 2025 February 22, 2025 9 February 23, 2025 March 1, 2025 10 March 2, 2025 March 8, 2025 11 March 9, 2025 March 15, 2025 12 March 16, 2025 March 22, 2025 13 March 23, 2025 March 29, 2025 14 March 30, 2025 April 5, 2025 15 April 6, 2025 April 12, 2025 16 April 13, 2025 April 19, 2025 17 April 20, 2025 April 26, 2025 18 April 27, 2025 May 3, 2025 19 May 4, 2025 May 10, 2025 20 May 11, 2025 May 17, 2025 21 May 18, 2025 May 24, 2025 22 May 25, 2025 May 31, 2025 23 June 1, 2025 June 7, 2025 24 June 8, 2025 June 14, 2025 25 June 15, 2025 June 21, 2025 26 June 22, 2025 June 28, 2025 27 June 29, 2025 July 5, 2025 28 July 6, 2025 July 12, 2025 29 July 13, 2025 July 19, 2025 30 July 20, 2025 July 26, 2025 31 July 27, 2025 August 2, 2025 32 August 3, 2025 August 9, 2025 33 August 10, 2025 August 16, 2025 34 August 17, 2025 August 23, 2025 35 August 24, 2025 August 30, 2025 36 August 31, 2025 September 6, 2025 37 September 7, 2025 September 13, 2025 38 September 14, 2025 September 20, 2025 39 September 21, 2025 September 27, 2025 40 September 28, 2025 October 4, 2025 41 October 5, 2025 October 11, 2025 42 October 12, 2025 October 18, 2025 43 October 19, 2025 October 25, 2025 44 October 26, 2025 November 1, 2025 45 November 2, 2025 November 8, 2025 46 November 9, 2025 November 15, 2025 47 November 16, 2025 November 22, 2025 48 November 23, 2025 November 29, 2025 49 November 30, 2025 December 6, 2025 50 December 7, 2025 December 13, 2025 51 December 14, 2025 December 20, 2025 52 December 21, 2025 December 27, 2025 - Footnote 3
-
If a rash was not observed or rash onset date was unknown, the earliest of: symptom onset date, laboratory specimen collection date, public health investigation date, and date reported to PHAC was used.
- Footnote 4
-
Exposure source is categorized as 1) "Exposed outside of Canada" when the case had international travel history during their exposure period (7 to 21 days before rash onset); 2) "Exposed in Canada, epidemiologically/virologically linked" when the case is epidemiologically and/or virologically linked to a previous confirmed measles case or known measles exposure source; and 3) "Unknown exposure source" when the source of the case is unknown (case did not report international travel during their exposure period AND is not known to be linked to a previous measles case or known measles exposure source).
- Footnote 5
-
Case counts for 2025 are not for the full year and include only cases reported as of the current epidemiological week. One case with rash onset in epidemiological week 1, 2025 (December 29, 2024 - January 4, 2025) but occurring in 2024 has been included in 2024 case counts.
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