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NIAID Data Ecosystem2026-05-10 收录
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In 1998, the World Health Organization declared that measles had been eliminated in Canada. Despite this status, Canada continues to experience sporadic outbreaks driven by importations from endemic countries. Understanding the post-elimination outbreaks is crucial for informing prevention and control policies. The purpose of this review was to identify and analyze epidemiological factors of measles outbreaks’ resurgence in Canada. We conducted a PRISMA scoping review to compile epidemiological data from peer-reviewed articles and grey literature on outbreaks in Canada from 1999 to 2025. A total of 618 articles were retrieved from the 9 databases queried, and 144 grey literature items were collected in the manual search; including 18 peer-reviewed articles and 28 grey literature sources. Eighty distinct outbreaks with a total of 7,455 cases were reported between 1999 and 2025 where 61.7% of the outbreaks were associated with imported cases of measles and 79.7% of the cases had not received the Measles-Mumps-Rubella vaccine. More than 60% of the cases (5078) were related to the 2025 multijurisdictional outbreak. Post-elimination measles outbreaks in Canada are primarily caused by importation of the disease and subsequent transmission in local under-vaccinated communities.

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2026-04-13
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