Key Takeaways
- The upcoming FIFA World Cup matches in Toronto and Vancouver could draw ~300 000 visitors, raising concerns about communicable‑disease spread.
- Canada’s Public Health Agency identified measles as a “high risk” pathogen and Clade Ib Mpox as a “moderate risk” for importation and transmission during the event.
- Declining measles‑vaccination coverage in several provinces (below the 95 % herd‑immunity threshold) leaves pockets of susceptibility, especially among younger, unvaccinated groups.
- Canada’s recent measles resurgence (over 5 400 cases in 2024‑25) shows the virus can spread rapidly when immunity gaps exist, even though the outbreak has since slowed.
- Health‑care experts warn that the system is already operating at or near full capacity; a large outbreak could overwhelm emergency departments, inpatient beds, and staffing resources.
- Provincial authorities are enhancing surveillance and preparedness (e.g., B.C.’s enhanced public‑health monitoring, Ontario’s moderate‑risk assessment for measles, food‑waterborne illness, and COVID‑19).
- Some infectious‑disease specialists argue that lifelong immunity from pre‑1970s infection and high vaccine‑derived protection in younger cohorts may limit the outbreak’s magnitude, but vulnerable subpopulations remain at risk.
Overview of the FIFA‑Related Public‑Health Concern
As thousands prepare to flock to Toronto and Vancouver for the FIFA World Cup, public‑health officials are sounding alarms about the potential for infectious‑disease transmission. The influx of roughly 300 000 domestic and international visitors in a short timeframe creates conditions ripe for pathogen spread, especially in crowded venues, public transport, and shared accommodations. Health agencies are focusing on measles, which spreads efficiently via respiratory droplets, and Clade Ib Mpox, which poses a moderate risk due to its transmissibility through close contact. The concern is amplified by the fact that Canada’s health‑care system is already strained, operating at or near full capacity in many regions.
Public Health Agency of Canada’s Risk Assessment
The Public Health Agency of Canada evaluated 14 infectious‑disease pathogens for their likelihood of importation and widespread transmission during the global event. Measles emerged as the top threat, classified as “high risk,” while Clade Ib Mpox was labelled “moderate risk.” Other pathogens—including poliovirus, Ebola virus, and various respiratory viruses—were deemed low or negligible risk. The agency’s assessment highlighted measles’ extraordinary contagiousness, noting that a single infectious case can seed dozens of secondary infections in susceptible populations, particularly when vaccination coverage falls below the herd‑immunity threshold.
Measles Transmission and Vaccination Gaps
Dr. Dale Kalina Samji, Chief Medical Information Officer at Brant Community Healthcare System, emphasized that measles spreads “readily” and that communities surrounding Toronto and parts of Alberta currently exhibit lower vaccine rates. Canada’s overall measles‑vaccination coverage has slipped in recent years, with several provinces falling short of the ~95 % level needed to prevent sustained transmission. This decline leaves sizable pockets of susceptible individuals, chiefly children who have missed routine MMR doses and adults who were never vaccinated or lost immunity. Consequently, an infected traveler could ignite a rapid outbreak if they encounter these under‑immunized groups.
Recent Canadian Measles Resurgence
Between late 2024 and through 2025, Canada experienced its worst measles resurgence since the virus was declared eliminated in 1998. An outbreak that began in late 2024 accelerated sharply, culminating in more than 5 400 confirmed cases nationwide. The surge underscored how quickly measles can exploit immunity gaps, especially when vaccination rates dip. Although national weekly reports now show far fewer new cases—some provinces have declared the outbreak over or reduced to sporadic imported cases—the episode serves as a stark reminder of the virus’s epidemic potential when herd immunity wanes.
Global Measles Context and Importation Risk
While Canada’s domestic measles activity has subsided, the virus remains elevated globally. Ongoing significant outbreaks persist in Mexico, the United States, Bangladesh, Romania, and various European countries, driven by declining vaccination coverage and post‑pandemic immunity gaps. Dr. Zahid Butt, an infectious‑disease epidemiologist at the University of Waterloo, warned that many FIFA attendees will arrive from these endemic regions, potentially lacking up‑to‑date measles vaccinations. Such travelers could inadvertently introduce the virus into Canadian crowds, seeding transmission among susceptible locals.
Health‑System Capacity Concerns
Gerald Evans, medical director of infection prevention and control at Kingston Health Sciences Centre, stressed that Canada’s health‑care system is already stretched to its limits. “In the event of a major outbreak… that can really overwhelm the health‑care system hugely because we’re already working at one hundred percent capacity,” he told CTV News. Emergency departments, inpatient wards, and intensive‑care units are functioning near full occupancy, leaving little surge capacity to absorb a sudden influx of measles‑related cases, which could include pneumonia, encephalitis, or severe dehydration requiring hospitalization.
Staffing and Resource Challenges
Both Evans and Butt highlighted workforce shortages as a critical vulnerability. “We are already understaffed,” Butt noted, questioning how additional staff could be mobilized or redirected from other facilities to meet outbreak demand. The logistical hurdles of transferring personnel, securing extra beds, and maintaining adequate supplies of vaccines, antivirals, and personal protective equipment become formidable when the system operates at baseline capacity. Effective preparedness, therefore, hinges on pre‑event planning that addresses staffing surges, stockpiling of essential medicines, and clear protocols for isolating and treating infectious patients.
Provincial Preparedness Measures
In response to the risk assessment, British Columbia’s Ministry of Health announced “enhanced public health surveillance activities” during the FIFA World Cup to detect any importation of communicable diseases. The BC Centre for Disease Control completed a risk assessment that considered factors such as population density, venue crowding, food‑service demands, summer heat, potential wildfires, and shifts in social behaviour and transportation. Most risks were rated low, with some moderate. Ontario, while not providing a comment, released a recent Public Health Ontario infectious‑diseases risk assessment that rated measles, food‑and‑waterborne illnesses, and COVID‑19 as “moderate risk.” The report urged continued scanning of local, national, and global public‑health signals and robust surveillance throughout the event.
Perspective on Limited Outbreak Potential
Dr. Isaac Bogoch, an infectious‑disease specialist at Toronto General Hospital, offered a more optimistic view, arguing that the risk of a large measles outbreak may be minimal despite slipping vaccination rates. He pointed out that individuals born before the 1970s are presumed to have contracted measles naturally and thus possess lifelong immunity, while the majority of those born after 1970 have received the MMR vaccine, which confers strong, durable protection. According to Bogoch, only a relatively small subgroup—those who remain unvaccinated or whose immunity has waned—would be susceptible. Nevertheless, he conceded that even a limited number of susceptible individuals could sustain transmission if exposed to an infectious traveler, underscoring the need for targeted vaccination campaigns and vigilant case‑finding.
Conclusion and Recommendations
The impending FIFA World Cup in Toronto and Vancouver presents a tangible public‑health challenge: a massive, transient population increase intersecting with existing measles‑immunity gaps and a health‑care system already operating at capacity. While experts disagree on the precise magnitude of risk, consensus exists that proactive measures—such as intensified vaccination outreach, heightened surveillance, stockpiling of medical supplies, and clear surge‑capacity plans for staffing and beds—are essential. By addressing these areas now, Canadian health authorities can mitigate the threat of measles (and other communicable diseases) and help ensure that the festivities proceed without overwhelming the nation’s medical infrastructure.