Hippisley-Cox, J., Coupland, C., Mehta, N., Keogh, R., Diaz-Ordaz, K., Khunti, K., Lyons, R., Kee, F., Sheikh, A., Rahman, S., Valabhji, J., Harrison, E., Sellen, P., Haq, N., Semple, M., Johnson, P., Hayward, A. & Nguyen-Van-Tam, J. 2021, 'Risk prediction of covid-19 related death and hospital admission in adults after covid-19 vaccination: national prospective cohort study', The BMJ, 374, article no: n2244. https://doi.org/10.1136/bmj.n2244