Two-dose ChAdOx1 nCoV-19 vaccine protection against COVID-19 hospital admissions and deaths over time : a retrospective, population-based cohort study in Scotland and Brazil

Katikireddi, S V, Cerqueira-Silva, T, Vasileiou, E, Robertson, C, Amele, S, Pan, J, Taylor, B, Boaventura, V, Werneck, G L, Flores-Ortiz, R, Agrawal, U, Docherty, A B, McCowan, C, McMenamin, J, Moore, E, Ritchie, L D, Rudan, I, Shah, S A, Shi, T, Simpson, C R, Barreto, M L, Oliveira, V D A, Barral-Netto, M & Sheikh, A 2022, 'Two-dose ChAdOx1 nCoV-19 vaccine protection against COVID-19 hospital admissions and deaths over time : a retrospective, population-based cohort study in Scotland and Brazil', The Lancet, vol. 399, no. 10319, pp. 25-35. https://doi.org/10.1016/S0140-6736(21)02754-9