Flook, MJackson, CVasileiou, ESimpson, C RMuckian, M DAgrawal, UMcCowan, CJia, YMurray, J L KRitchie, L DRobertson, CStock, S JWang, XWoolhouse, M E JSheikh, AStagg, H R2021-05-072021-05-072021-04Flook, M, Jackson, C, Vasileiou, E, Simpson, C R, Muckian, M D, Agrawal, U, McCowan, C, Jia, Y, Murray, J L K, Ritchie, L D, Robertson, C, Stock, S J, Wang, X, Woolhouse, M E J, Sheikh, A & Stagg, H R 2021, 'Informing the public health response to COVID-19 : a systematic review of risk factors for disease, severity, and mortality', BMC Infectious Diseases, vol. 21, 342. https://doi.org/10.1186/s12879-021-05992-11471-2334PubMedCentral: PMC8040367https://hdl.handle.net/2164/16407Funding HRS and MF are supported by the Medical Research Council [MR/R008345/1]. CJ’s salary came through MRC core funding MC_UU_12023/26. SJS is funded by the Wellcome Trust [WT 209560/Z/17/Z]. CRS has received funding from the Medical Research Council [MR/R008345/1], the National Institute for Health Research [11/46/23] and the New Zealand Health Research Council [20/1018] and Ministry for Business, Innovation and Employment. EV is funded by the Medical Research Council [MR/R008345/1] through the EAVE II grant and supported by the Scottish Government. We also acknowledge the support of HDR UK. The views and opinions expressed here are those of the authors and do not necessarily reflect those of the Health Technology Assessment programme, NIHR, NHS, or the UK Department of Health. Our funders had no role in the design of the study and collection, analysis, and interpretation of data, and in writing the manuscript.23802103engSDG 3 - Good Health and Well-beingCOVID-19/diagnosisChinaHumansPandemicsPublic HealthRisk FactorsR Medicine (General)Medical Research Council (MRC)MR/R008345/1Wellcome Trust209560/Z/17/ZNational Institute for Health Research (NIHR)11/46/23R1Journal article10.1186/s12879-021-05992-121