Hippisley-Cox, J., Coupland, C. A., Mehta, N., Keogh, R. H., Diaz-Ordaz, K., Khunti, K., Lyons, R. A., Kee, F., Sheikh, A., Rahman, S., Valabhji, J., Harrison, E. M., Sellen, P., Haq, N., Semple, M. G., Johnson, P. W. M., Hayward, A., & Nguyen-Van-Tam, J. S. (2021). Risk prediction of covid-19 related death and hospital admission in adults after covid-19 vaccination: National prospective cohort study. BMJ, 374, Article n2244. https://doi.org/10.1136/bmj.n2244