“Red Card for Public Health: Measles Is Already Winning Before the World Cup Kicks Off”

There is a particular kind of concern that does not make the front page until it is too late. Right now, with less than 30 days before the FIFA World Cup kicks off across Canada and the United States, that concern has a name — and it has been spreading quietly for months.

It is measles. And it is not a background risk. It is the top infectious disease threat identified by Canada’s own public health agency ahead of the most-watched sporting event on the planet.

The Number Formation 

Canada and the United States are currently recording their highest measles case counts in 33 years. To put that in context: the last time either country saw figures like these, the internet was barely a consumer product and mass international travel looked nothing like it does today.

Canada lost its measles elimination status in 2024 — a designation it had held since 1998. Nearly three decades of progress, interrupted. The Public Health Agency of Canada has now officially confirmed that the country failed to interrupt transmission within the required one-year window. Elimination status, once lost, is not easily recovered.

The outbreaks are not evenly distributed. Manitoba currently leads in case volume, with more than 600 confirmed cases this year alone. Alberta follows, with numbers that have alarmed even seasoned epidemiologists — more than double the caseload of the second-highest province. Ontario has not been spared either.

In the United States, transmission is active in multiple states. South Carolina has been a persistent hotspot. Cases have now reached Washington D.C. Public health officials are watching closely to see whether the US follows Canada in losing its own elimination status.

Why the World Cup Changes Everything

Mass gathering events do not create outbreaks from nothing. What they do is accelerate and amplify whatever is already circulating — and measles is already circulating at scale in both host nations.

The FIFA World Cup will bring together players, staff, and hundreds of thousands of fans from across the globe, converging on Toronto and Vancouver over the coming weeks. Health officials have assessed 14 pathogens that could be imported or exported during the games — including avian influenza, mpox, Ebola, and poliovirus.

Measles ranked first.

The reason is straightforward: measles is one of the most contagious pathogens ever identified. It spreads through the air. A single infectious individual in an enclosed space — a stadium concourse, a transit hub, a hotel lobby — can expose every unvaccinated person in that environment. The agency’s assessment described a high likelihood of importation and warned of moderate impact on host city populations.

Mpox was listed second on the risk assessment, but it poses only a moderate threat because transmission requires close or direct contact. Measles requires only proximity. That distinction matters enormously in a crowd of tens of thousands.

The Communities at the Centre of It

The current outbreaks in Canada have not spread evenly across the population. A significant proportion of cases have been traced to Mennonite communities, where vaccination rates remain low due to sincerely held religious beliefs. These communities have been at the centre of the Manitoba and Alberta surges, and their concentration in specific geographic areas has shaped the outbreak’s trajectory considerably.

This context is worth understanding clearly — not to assign blame, but because outbreak dynamics are always shaped by where immunity gaps exist. The gaps, in this case, are known. The question is whether the response is proportionate to what is coming.

The Broader Pattern

Canada is not alone in facing this moment without its elimination status intact. Britain, Spain, and several other European countries have also lost theirs in recent years. The erosion of measles elimination across high-income nations — countries with the resources and infrastructure to sustain vaccination coverage — is one of the defining public health trends of this decade.

The causes are not mysterious: vaccine hesitancy, pandemic-era disruption to routine immunisation programmes, and in some cases, deliberate policy choices that have allowed coverage to slip. The consequences are now visible in real case numbers, in real communities, in two countries preparing to host the world.

What This Means in Practice

The question is not whether measles will be present at the World Cup. Given current transmission in both host countries and the global nature of the attending population, some degree of spread is a near-certainty.

The question is how much — and whether individuals, communities, and health systems are prepared for what follows after the final whistle.

Vaccination remains the only reliable protection. Two doses of the MMR vaccine provide approximately 97% protection against measles. For anyone uncertain of their vaccination status ahead of the tournament — whether attending, working at, or simply living in a host city — checking and updating immunisation records now is not an overreaction. It is the appropriate response to a documented, active risk.

The Scoreline, Before It Starts

Two of the world’s largest nations. Historically high measles case counts. A global sporting event drawing fans from every corner of the planet. And a pathogen that requires nothing more than shared air to move from one person to the next.

Public health officials have done their job. They ran the numbers, assessed the risks, and published the warning.

What happens next depends on whether anyone is paying attention.

_If you are attending World Cup events or live in a host city, verify your MMR vaccination status with your healthcare provider before the tournament begins_