Signage for the FIFA World Cup at The Shops at Columbus Circle in New York, May 21, 2026.Michael Nagle | Bloomberg | Getty ImagesAs athletes and millions of fans gear up for the FIFA World Cup starting next week, global health officials are preparing for a high-stakes challenge of their own: protecting against infectious diseases.For the first time, the tournament will span 16 host cities across three countries — the United States, Canada and Mexico — and feature 48 teams, making it the largest World Cup in history. The event also comes amid an Ebola outbreak in Congo and Uganda that the World Health Organization has designated a “public health emergency of international concern.” Despite those worries, the risk of widespread Ebola transmission during the tournament is low, infectious disease experts told CNBC. Public health departments, hospitals and other partners are also well equipped to respond to a range of potential threats — even after sweeping cuts to critical federal agencies and the U.S. exiting from the WHO under the Trump administration.”Ebola and hantavirus, I worry about a lot less,” Dr. Shruti Gohil, the associate medical director for University of California, Irvine Health Epidemiology and Infection Prevention, said in an interview. “The overall likelihood of risk is not nonzero, but it’s low, very low, because it is not easy to transmit person to person.” Instead, experts say more contagious threats could pose greater challenges during the tournament and other large events this summer, particularly because international visitors could move through multiple venues and cities in a matter of days. Those threats include measles — one of the world’s most contagious diseases — as well as respiratory viruses such as Covid-19 and influenza. The concern comes after the U.S. recorded its highest number of measles cases in decades last year, driven in part by growing vaccine hesitancy and declining immunization rates. Some experts also pointed to arboviruses spread by infected insects, such as dengue, while others highlighted heat-related and foodborne illnesses as notable risks beyond infectious diseases.Preparing for the World Cup has involved scaling up existing programs, such as wastewater monitoring, and adding new tools to track infectious disease threats. Those systems will face their first major test when the tournament kicks off on June 11, but public health officials say they are ready to take on the challenge. “Public health prides itself in being the invisible shield, but I don’t want that to get lost in the actual Herculean effort it takes to have an operational invisible shield, so that people can enjoy events like the World Cup and feel safe and secure in their public health when they’re here,” said Dr. …
