Canada’s Measles Cases Continue to Rise: Latest National Data Explained
Recent surveillance data from the Public Health Agency of Canada shows measles cases remain a significant public health concern following a major outbreak that began in late 2024. The national monitoring dashboard tracking measles and rubella cases reveals that Canada continues to report new infections as health officials work to contain transmission and restore high vaccination coverage.
Although case numbers fluctuate week to week, the latest statistics show that the virus is still circulating in several provinces.
Current Measles Numbers in Canada
According to the most recent national surveillance update, 347 measles cases have been reported in Canada, including 278 confirmed cases and 69 probable cases. These cases have been identified across three jurisdictions: Manitoba, Ontario and Québec.
Public health monitoring also indicates that 123 new measles cases were reported in a single epidemiological week, demonstrating how quickly outbreaks can expand once transmission begins. Of those weekly cases, 105 were laboratory-confirmed and 18 were classified as probable infections.
Health officials note that case counts may change as additional cases are reported or investigated, since surveillance data is updated regularly.
A Sharp Increase Compared With Previous Years
The current measles situation marks a dramatic change from recent years. Canada had maintained relatively low case numbers for much of the past decade.
Between 2020 and 2023, annual measles cases were extremely limited, with 0 cases in 2021, three cases in 2022 and 12 cases in 2023.
However, the situation escalated rapidly in the past two years. In 2024, 146 measles cases were reported nationwide, signalling the start of a larger outbreak. The following year saw an unprecedented surge, with 5,045 confirmed cases and an additional 310 probable cases reported in 2025.
This represents the highest national measles count in decades and a dramatic increase compared with the historical annual average of approximately 91 cases per year recorded between 1998 and 2024.
How the Outbreak Began
Public health officials link the surge in cases to a multi-jurisdictional outbreak that began in October 2024. The virus spread through several provinces and territories, leading to sustained community transmission.
The strain associated with the outbreak has been identified as wild-type measles virus genotype D8, which has circulated globally in several recent outbreaks.
Because measles is highly contagious, even a single infected individual can trigger a large outbreak in communities with lower vaccination coverage.
Why Measles Spreads So Easily
Measles remains one of the most infectious viral diseases in the world. The virus spreads through respiratory droplets when an infected person coughs or sneezes and can linger in the air or on surfaces for up to two hours.
Symptoms typically include fever, cough, runny nose and the characteristic red rash. Complications can be serious, particularly for infants, pregnant individuals and those with weakened immune systems.
Public health authorities stress that vaccination remains the most effective defence. Two doses of the measles-containing vaccine are widely recommended to provide long-lasting protection against infection.
The Importance of Vaccination and Monitoring
Canada first achieved measles elimination status in 1998, meaning the virus was no longer continuously circulating within the country. However, the recent outbreak demonstrates how quickly vaccine-preventable diseases can return when immunity levels decline.
Health officials continue to monitor new cases through weekly surveillance reports and are urging Canadians to review their immunisation records, particularly before travelling internationally.
While the number of reported cases in 2026 remains far lower than the surge seen in 2025, experts warn that maintaining high vaccination coverage will be essential to prevent future outbreaks and reduce the risk of renewed transmission across the country.