Air sampling in team congregate spaces for early detection of respiratory virus threats at the 2026 FIFA World Cup™

Background. Respiratory infections are the leading cause of illness at major sporting events, yet surveillance relies on athletes recognising and reporting symptoms, missing asymptomatic, pre-symptomatic and unreported infections. During competitions, teams are housed together and share spaces with members of the broader community. Aim. To evaluate whether continuous air sampling with point-of-care testing could detect respiratory-virus nucleic acids in an elite team's congregate spaces during competition, and whether the signals were operationally useful. Methods. 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 team-designated 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(R) 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, 13 yielded detections of viral 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 context of an elite team and can surface behavior-independent viral signals during competition that may offer opportunities for earlier precautionary actions.