Global, regional, and national estimates of the population at increased risk of severe COVID-19 due to underlying health conditions in 2020: a modelling study oleh Andrew Clark, PhD, Mark Jit, ProfPhD, Charlotte Warren-Gash, PhD, Bruce Guthrie, ProfPhD, Harry H X Wang, PhD, Stewart W Mercer, ProfPhD, Colin Sanderson, ProfPhD, Martin McKee, ProfDSc, Christopher Troeger, MPH, Kanyin L Ong, PhD, Francesco Checchi, ProfPhD, Pablo Perel, ProfPhD, Sarah Joseph, PhD, Hamish P Gibbs, MSc, Amitava Banerjee, DPhil, Rosalind M Eggo, PhD, Emily S Nightingale, Kathleen O'Reilly, Thibaut Jombart, W John Edmunds, Alicia Rosello, Fiona Yueqian Sun, Katherine E Atkins, Nikos I Bosse, Samuel Clifford, Timothy W Russell, Arminder K Deol, Yang Liu, Simon R Procter, Quentin J Leclerc, Graham Medley, Gwen Knight, James D Munday, Adam J Kucharski, Carl A B Pearson, Petra Klepac, Kiesha Prem, Rein M G J Houben, Akira Endo, Stefan Flasche, Nicholas G Davies, Charlie Diamond, Kevin van Zandvoort, Sebastian Funk, Megan Auzenbergs, Eleanor M Rees, Damien C Tully, Jon C Emery, Billy J Quilty, Sam Abbott, Ch Julian Villabona-Arenas, Stéphane Hué, Joel Hellewell, Amy Gimma, Christopher I Jarvis