1. World Health Organization: Pneumonia of unknown cause-China (2020). https://www.who.int/csr/don/05-january-2020-pneumonia-of-unkown-cause-china/en/. Accessed 5 Jan 2020
2. World Health Organization: Updated WHO advice for international traffic in relation to the outbreak of the COVID-19. WHO, Geneva. https://www.who.int/ith/COVID-19adviceforinternational traffic/en/. Accessed 11 Apr 2020
3. World Health Organization: Clinical management of severe acute respiratory infection when infection is suspected (2020). https://www.who.int/publications-detail/clinical-management-of-severe-acute-respiratory-infection-when-novel-/coronavirus-(ncov)-infection-is-suspected. Accessed 13 Mar 2020
4. Event Horizon - COVID-19: Coronavirus COVID=19 global risk assessment. http://rocs.hu-berlin.de/corona/relative-import-risk. Accessed 26 Feb 2020
5. Li, Q., Guan, X., Wu, P., Wang, X., Zhou, L., Tong, Y., et al.: Early transmission dynamics in Wuhan, China, of novel coronavirus-infected pneumonia. N. Engl. J. Med. 382(13), 1199–1207 (2020)