Air sampling in team congregate spaces for early detection of respiratory virus threats at the 2026 FIFA World Cup™
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Objective.
Respiratory infections are the leading cause of illness at major sporting events, yet surveillance relies on athletes recognising and reporting symptoms. We evaluated whether continuous air sampling with point-of-care molecular testing could detect respiratory-virus nucleic acids in an elite team’s congregate spaces during competition, and whether the resulting signals were operationally useful.
Methods.
We performed a prospective, descriptive environmental-surveillance study following the Canadian men’s national soccer team across five host cities during the 2026 FIFA World Cup™ (3 June to 4 July 2026). InBio Apollo bioaerosol samplers ran continuously in up to four teamdesignated rooms per hotel (physiotherapy, meal, equipment, and coaches’ room or hallway). Filters were changed approximately twice daily, eluted on-site, and tested with the Cepheid Xpert® Xpress SARS-CoV-2/Flu/RSV plus assay. A sample was considered positive if any cycle-threshold (Ct) value was reported, as less than 45, for a target.
Results.
Of 174 air filters, there were 13 detections of virus genetic material (9 SARS-CoV-2, 3 influenza A virus, 1 influenza B virus, 0 RSV). Detections were sparse early and clustered late in the tournament. An influenza A signal appeared the morning a player was sent home febrile, and SARS-CoV-2 signals coincided with visibly ill hotel staff, with signals falling after ill staff were excluded.
Conclusion.
Air sampling with point-of-care testing is feasible in the mobile environment of an elite team and can surface behavior-independent viral signals during competition that may offer opportunities for earlier precautionary actions.
Summary Box
What is already known on this topic
Respiratory infections are the leading cause of illnesses at major sporting events, and conventional surveillance depends on athletes recognising and reporting symptoms, which misses presymptomatic, mild, and asymptomatic infections. Air sampling can detect respiratory viruses in congregate settings but has not been evaluated in elite team housing during competition.
What this study adds
Continuous air sampling with same-day point-of-care testing was feasible across a five-city World Cup campaign and detected SARS-CoV-2, influenza A, and influenza B in shared team spaces even during the low-circulation Northern-hemisphere summer, with several signals coinciding with a febrile player and with visibly ill staff.
How this study might affect research, practice or policy
Air sampling offers a candidate behavior-independent method to generate an early-warning signal that could allow teams to escalate precautions selectively, minimizing virus exposures among athletes and team staff.
Central Figure
Air sampling for early detection of respiratory-virus threats in an elite team during competition.
Continuous bioaerosol sampling was performed in up to four team congregate spaces per hotel, typically the meal, equipment, physiotherapy, and coaches’ rooms, across five host cities during the 2026 FIFA World Cup™. Each sampler’s filter was eluted on-site and tested on a Cepheid GeneXpert SARS-CoV-2/Flu/RSV plus cartridge, giving a same-day, point-of-care result (top). Viral genetic material was detected in team-hotel air in every one of the five cities. The timeline shows sampling coverage as a horizontal band and each viral detection as a vertical tick on a single continuous time axis across the tournament, with detections sparse early and clustered in the final cities (middle). A positive air signal can trigger low-cost, low-regret responses before an outbreak is clinically apparent, such as masking, portable air purifiers, distancing and reduced occupancy, far-UVC lighting, reinforced ventilation, and excluding visibly ill personnel (bottom).
