1. Huang C, Wang Y, Li X et al (2020) Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet 395:497–506. https://doi.org/10.1016/S0140-6736(20)30183-5
2. World Health Organization. WHO Director-General's opening remarks at the media briefing on COVID-19.Online: https://www.who.int/dg/speeches/detail/whodirector- general-s-opening-remarks-at-the-media-briefing-on-covid-19. Accessed 14 Aug 2020
3. Gorbalenya AE, Baker SC, Baric RS et al (2020) The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 5:536–544. https://doi.org/10.1038/s41564-020-0695-z
4. Novel Coronavirus (2019-nCoV) Situation Report – 22 (World Health Organization); https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200211-sitrep-22-ncov.pdf. Accessed 14 Aug 2020
5. . World Health Organization. Summary of probable SARS cases with onset of illness Geneva (Switzerland): World Health Organization; 2003 Dec. Available from: https://www.who.int/csr/sars/country/table2004_04_21/en. Accessed 14 Aug 2020