Lyons, J., Nafilyan, V., Akbari, A., Bedston, S., Harrison, E., Hayward, A., Hippisley-Cox, J., Kee, F., Khunti, K., Rahman, S., Sheikh, A., Torabi, F. & Lyons, R. 2023, 'An external validation of the QCOVID3 risk prediction algorithm for risk of hospitalisation and death from COVID-19: An observational, prospective cohort study of 1.66m vaccinated adults in Wales, UK', PLoS ONE, 18(5), article no: e0285979. https://doi.org/10.1371/journal.pone.0285979