Canada loses measles elimination status: what do local immunity gaps mean?

A study in the BMJ examined the measles outbreak that contributed to Canada losing its measles elimination status in November 2025. According to the study, the outbreak concentrated in historically undervaccinated communities with close social ties. Those ties ran across Canada, the US, Mexico and other countries, so the virus crossed borders easily. Let's discuss: — Is high average national vaccination coverage enough if individual communities remain undervaccinated? How should clinicians and public health teams think about these local gaps? — What approaches to communication and outreach with undervaccinated communities have you seen work or fail (without identifying any patients)? — How does travel history or exposure within a close-knit community change your index of suspicion for measles in a patient with fever and rash? For USMLE and practice: measles (Paramyxoviridae), Koplik spots, complications, herd immunity and MMR vaccination are classic topics, and this outbreak shows how they connect to infection control at the national level. Full article: drasiiavinograd.com/blog/measles-elimination-status-canada-outbreak-an Source: Medical Xpress medicalxpress.com/news/2026-10-measles-outbreak-contributed-canada-sta