World Cup Travel Vaccine Concerns Rise Over 6.5 Million Visitors
Public health experts are warning that the World Cup could turn into a travel vaccine test for North America as the United States, Canada and Mexico prepare to host the tournament over the next month. By some estimates, 6.5 million visitors from around the world could arrive during the event.
The concern centers on measles, with Mexico reporting nearly 11,000 cases this year, the United States recording 30 separate outbreaks and 1,983 confirmed cases, and Canada counting 5,081 infections in 2025. Canada lost its measles-elimination status in November, while the United States and Mexico were said to be in danger of losing theirs this fall.
PAHO measles alert
The Pan American Health Organization issued an alert about measles in the Americas and said host countries should strengthen their public health efforts to monitor and quell outbreaks in light of the World Cup. Arjun V.K. Sharma, a physician and writer in Toronto, warned that mass gatherings and an infectious disease make for a bad mix.
Dr. Kamran Khan said the impact of World Cup-related outbreaks could reach far and wide. Dr. Isaac Bogoch, an infectious disease physician and professor at the University of Toronto, said, “We’re seeing a massive global resurgence of vaccine-preventable diseases, measles being one of them.”
World Cup measles spread
The risk is not theoretical. In the early 1990s at the International Special Olympics Games in Minneapolis-St. Paul, measles spread from an Argentine track-and-field athlete to 25 other people, and two spectators seated up near the rafters were among those infected. After the Winter Olympics in Vancouver, an outbreak of 82 measles cases followed.
Those outbreaks show how large sports crowds can carry infections beyond one venue, especially when people travel home after the event. Declining vaccination rates across the world, funding cuts to aid organizations like Gavi, the Vaccine Alliance, conflict-related disruptions to immunization programs and more ideological barriers to vaccination have all helped drive the wider resurgence of vaccine-preventable diseases.
North America hosts
The World Cup will unfold across the United States, Canada and Mexico over the next month, with measles already circulating in all three host countries. For travelers, the most practical step is to treat vaccination as part of trip planning, because the tournament’s crowd density and international travel create the setting health officials are warning about.
