World Health Organization. Naming The Coronavirus Disease (COVID-19) and The Virus That Causes It. World Health Organization. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it, (accessed 2021-9-30)
Our World in Data. Statistics and Research Coronavirus Pandemic (COVID-19) cases. Our World in Data. https://ourworldindata.org/covid-cases, (accessed 2021-12-13)
Bloom CI, Drake TM, Docherty AB, et al. Risk of adverse outcomes in patients with underlying respiratory conditions admitted to hospital with COVID-19 : a national, multicentre prospective cohort study using the ISARIC WHO Clinical Characterisation Protocol UK. The Lancet Respiratory Medicine 2021 ; 9. doi:10.1016/S2213-2600(21)00013-8, (accessed 2021-9-30)