U.S. Braces for Disease Risks as 2026 World Cup Approaches

With the 2026 World Cup set to welcome spectators from over 100 countries, U.S. health officials have spent years developing contingency plans to address potential disease outbreaks during the event.

While recent media attention has focused on Ebola and Hantavirus, public health experts identify a different constellation of infectious threats as more pressing concerns. The primary risks include measles, dengue fever, influenza, respiratory syncytial virus (RSV), and Covid-19, alongside sexually transmitted infections. Crowded conditions in airports, hotels, stadiums, and public transit systems could accelerate transmission of these pathogens.

Measles Poses Particular Concern

Health specialists highlight measles as among the most troubling disease risks. The virus spreads through airborne transmission and can remain viable in an area for up to two hours after an infected person departs. Among unvaccinated populations, it proves highly transmissible—a single infected individual may infect hundreds of others during travel or time in public spaces before symptoms become apparent.

The resurgence of measles worldwide stems from declining vaccination rates following the pandemic. Even modest clusters of cases could rapidly expand into large-scale outbreaks given current immunization gaps.

Dengue Fever and Mosquito Season

Dengue cases have emerged in Puerto Rico, with limited domestic transmission already documented in certain U.S. states. Vector mosquitoes are established in multiple American regions. The timing presents additional challenges, as the tournament coincides with peak mosquito season in host cities including Miami, Houston, Dallas, and Los Angeles. Should infected visitors arrive during this period, the potential for local transmission increases substantially.

Respiratory Viruses Remain Under Watch

Though Covid-19 no longer commands the urgent concern it once did, monitoring will continue throughout the tournament. Summer waves of Covid-19 have been recorded annually since 2019. Health officials will also track influenza, RSV, and other respiratory pathogens during the event.

Ebola Risk Remains Low

Despite extensive media coverage, experts emphasize that Ebola poses minimal threat to the general population. The virus requires direct contact with bodily fluids for transmission. During the West African Ebola outbreak, no spread connected to major international gatherings occurred. Some medical professionals caution that disproportionate media attention may compromise diagnostic accuracy.

Coordinated Preparedness Efforts

The Centers for Disease Control and Prevention has expanded disease monitoring capabilities within host states, working alongside local health departments, hospitals, and emergency response teams. Training protocols and rapid response mechanisms have been enhanced, with particular emphasis on diseases likely imported from abroad, particularly measles and dengue fever.

Texas, which will host the largest number of matches, has established a round-the-clock infectious disease consultation network linking attending physicians with specialists. A dedicated team of 15 to 20 physicians stands ready to support hospitals, medical personnel, and visitors as circumstances require.