SARS-CoV-2 antigen testing: weighing the false positives against the costs of failing to control transmission. Issue 7 (July 2021) - Fearon, Elizabeth; Buchan, Iain E; Das, Rajenki; Davis, Emma L; Fyles, Martyn; Hall, Ian; Hollingsworth, T Deirdre; House, Thomas; Jay, Caroline; Medley, Graham F; Pellis, Lorenzo; Quilty, Billy J; et al.