In December 2019, a novel coronavirus COVID-19 emerged from Wuhan, China, and was soon declared as pandemic by the World Health Organization (WHO) on the 11 March 2020.1 The UK soon followed suit and implemented a national lockdown on the 23 March 2020. As of 9 December 2020, according to WHO, this highly infectious virus has infected more than 67 million people and led to over 1.5 million deaths across the world.2 There is a growing body of evidence on the epidemiology of the condition, risk factors for poor outcomes and effects of interventions.3–9
The original EAVE project was funded by the National Institute for Health Research Health Technology Assessment Programme (project number 13/34/14). EAVE II is funded by the Medical Research Council [MR/R008345/1] and supported by the Scottish Government. This work is supported by BREATHE—The Health Data Research Hub for Respiratory Health [MC_PC_19004]. BREATHE is funded through 10 the UK Research and Innovation Industrial Strategy Challenge Fund and delivered through Health Data Research UK.