Comparative transmission of SARS-CoV-2 Omicron (B.1.1.529) and Delta (B.1.617.2) variants and the impact of vaccination: national cohort study, England. - Allen H; Tessier E; Turner C; Anderson C; Blomquist P; Simons D; Løchen A; Jarvis CI; Groves N; Capelastegui F; Flannagan J; Zaidi A; et al. (Epidemiology and infection, 2023)