1. 1. World Health Organization. Pneumonia of unknown cause – China. https://www.who.int/csr/don/05-january-2020-pneumonia-of-unkown-cause-china/en/ (accessed April 15, 2020).
2. 2. Holshue ML, DeBolt C, Lindquist S, et al. First Case of 2019 Novel Coronavirus in the United States. N Engl J Med. 2020; 382:929-936.
3. 3. World Health Organization. Novel Coronavirus (2019-nCoV) Situation Report – 22. 2020. https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200211-sitrep-22-ncov.pdf?sfvrsn=fb6d49b1_2 (accessed April 15, 2020).
4. 4. Johns Hopkins Coronavirus Resource Center. COVID-19 Case Tracker. https://coronavirus.jhu.edu/ (accessed April 15, 2020).
5. 5. de Blasio B. Twitter, March 15, 2020. https://twitter.com/NYCMayor/status/1239331781041623040?s=20 (accessed April 15, 2020).