Roberts, Ben M., Adzic, Filipa, Hamilton-Smith, Ailsa, Iddon, Christopher, Wild, Oliver, Cook, Malcolm, Gwynne, Steve ORCID: https://orcid.org/0000-0002-2758-3897, Hunt, Aoife ORCID: https://orcid.org/0000-0002-6670-8779 and Malki-Epshtein, Liora (2025) Air quality at mass gatherings: assessing ventilation and occupancy in marquees to evaluate airborne infection risk during the COVID-19 pandemic. Building and Environment:113847. ISSN 0360-1323 (Print), 1873-684X (Online) (doi:10.1016/j.buildenv.2025.113847)