1. Trilla A, Trilla G, Daer C (2008) The 1918 “Spanish flu” in Spain. Clin Infect Dis 47(5):668–673
2. Fouchier RA, Kuiken T, Schutten M, Van Amerongen G, Van Doornum GJ, Van Den Hoogen BG et al (2003) Koch’s postulates fulfilled for SARS virus. Nature 423(6937):240–240
3. Wong G, Liu W, Liu Y, Zhou B, Bi Y, Gao GF (2015) MERS, SARS, and Ebola: the role of super-spreaders in infectious disease. Cell Host Microbe 18(4):398–401
4. World Health Organization (2020) Coronavirus disease 2019 [COVID-19]: Situation report, 70
5. Worldometers Coronavirus Update [Live]: 3,085,120 Cases and 212,546 deaths from COVID-19 virus pandemic—worldometer. Available from: https://www.worldometers.info/coronavirus/