Measles – Data and statistics

Measles cases in Alberta

Measles transmission is currently occurring in Alberta, affecting individuals of all ages – including infants, children and adults. Most reported cases have been in children under 5 years old and those aged 5 to 17 who are not immunized.

Cases have been reported in all zones of the province, with the highest numbers in the north, south and central zones. Due to the number of people in these areas who may not be immune to measles, it’s likely that some cases are going undetected or unreported.

Alberta Health Services shares known public exposure locations for the Edmonton, Calgary, Central and parts of the North Zone. A standing exposure advisory has been issued for the South Zone and areas of the North Zone. Site-specific exposure advisories will no longer be issued in these locations.

All Alberta residents, workers, students and visitors are advised to be aware of the increased risk of measles and ensure their measles immunizations are up to date.

Table 1. Confirmed measles cases by zone as of 12 pm, December 17, 2025

Data note(s):

• The 'total' number of cases referenced here refers to confirmed cases only.
• *Period of communicability – the time the other person can transmit measles to another person.
• Public health will determine period of communicability for individual measles cases for the purposes of contact management.
• **Active cases does not reflect risk in the community as there may be people with undiagnosed measles, nor does it reflect the number of persons who have been exposed to measles. This estimated number is used for public reporting purposes only.

Table 2. Confirmed measles cases by age group as of 12 pm, December 17, 2025

Table 3. Confirmed measles cases currently hospitalized December 16 2025

Data note(s):

• Currently hospitalized data are provided by Alberta Health Services. This data does not include cases reported to Alberta Primary and Preventative Health Services from Indigenous Services Canada.
• People in hospital who are not yet diagnosed or reported as a confirmed measles case are not included.

Weekly reporting

As of December 6, 2025, a total of 1,987 confirmed measles cases were reported in Alberta.

Table 6. Cumulative counts of hospitalizations, ICU admissions and deaths among confirmed measles cases March 1, 2025 to present

• Counts are cumulative and not limited to those currently in hospital or ICU
• ICU admissions are included in the total count of hospitalizations
• Hospitalizations, ICU admissions and deaths are only included if the outcome was related to their measles infection. 

Table 7. Immunization status of confirmed measles cases March 1, 2025 to present

¹Information on who is considered protected can be found in the Prevention of measles section.

Notes for Figure 2a-f:

• Excludes measles immunoglobulin administered as post-exposure prophylaxis
• Includes null doses administered to children < 12 months of age