1. CDC. 2019 Novel Coronavirus, Wuhan, China. CDC. Available at https://www.cdc.gov/coronavirus/2019-ncov/about/index.html. January 26, 2020; Accessed: January 27, 2020.
2. Gallegos A. WHO Declares Public Health Emergency for Novel Coronavirus // Medscape Medical News. Available at https://www.medscape.com/viewarticle/924596. January 30, 2020; Accessed: January 31, 2020.
3. Ramzy А., McNeil D.G. W.H.O. Declares Global Emergency as Wuhan Coronavirus Spreads // The New York Times. Available at https://nyti.ms/2RER70M. January 30, 2020; Accessed: January 30, 2020.
4. The New York Times. Coronavirus Live Updates: W.H.O. Declares Pandemic as Number of Infected Countries Grows // The New York Times. Available at https://www.nytimes.com/2020/03/11/world/coronavirus-news.html#link-682e5b06. March 11, 2020; Accessed: March 11, 2020.
5. https://www.who.int/emergencies/diseases/novel-coronavirus-2019.