1. World Health Organization (WHO, 2003), https://www.who.int/health-topics/severe-acute-respiratory-syndrome#tab=tab_1. Published 2003 and accessed November 16, 2020.
2. Do men have a higher case fatality rate of severe acute respiratory syndrome than women do?;Karlberg;Am J Epidemiol.,2004
3. World Health Organization (WHO, 2020-1). 2020. https://covid19.who.int. Accessed November 16, 2020.
4. Buchholz, K. (April 23, 2020). What Share of the World Population Is Already on COVID-19 Lockdown? [Digital image]. Retrieved November 16, 2020, from https://www.statista.com/chart/21240/enforced-covid-19-lockdowns-by-people-affected-per-country/
5. IDC. (September 1, 2020). Shipment forecast of tablets, laptops and desktop PCs worldwide from 2010 to 2023 (in million units) [Graph]. In Statista. Retrieved November 16, 2020, from https://www.statista.com/statistics/272595/global-shipments-forecast-for-tablets-laptops-and-desktop-pcs/