Agrawal, U, Bedston, S, McCowan, C, Oke, J, Patterson, L, Robertson, C, Akbari, A, Azcoaga-Lorenzo, A, Bradley, DT, Fagbamigbe, AF, Grange, Z, Hall, ECR, Joy, M, Katikireddi, SV, Kerr, S, Ritchie, L, Murphy, S, Owen, RK, Rudan, I, Shah, SA et al, Simpson, CR, Torabi, F, Tsang, RSM, de Lusignan, S, Lyons, RA, O'Reilly, D and Sheikh, A (2022) Severe COVID-19 outcomes after full vaccination of primary schedule and initial boosters: pooled analysis of national prospective cohort studies of 30 million individuals in England, Northern Ireland, Scotland, and Wales. The Lancet, 400 (10360). pp. 1305-1320. ISSN 0140-6736