- Participation in a large, indoor, live gathering without physical distancing was not associated with increased SARS-CoV-2–transmission risk, provided a comprehensive preventive intervention was implemented: a non-inferiority, randomised, controlled trail at the Accor Arena on May 29, 2021 in Paris https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(21)00673-3/fulltext 13 comments science