²²It is a joint work of the authors from the Chinese CDC, Hubei CDC and the University of Hong Kong. Based on a retrospective analysis of 425 confirmed cases reported as of 23 January, they confirmed that human-to-human transmission of pneumonia caused by 2019-nCoV (i.e. COVID-19) occurred among close contacts in December 2019.

      ²³https://www.who.int/news-room/detail/27-04-2020-who-timeline---covid-19.

      ²⁴http://wjw.hubei.gov.cn/fbjd/dtyw/202002/t20200213_2025581.shtml.

      ²⁵http://www.gov.cn/xinwen/2020-01/23/content_5471751.htm.

      ²⁶http://www.comnews.cn/article/ibdnews/202001/20200100033108.shtml.

      ²⁷http://hb.people.com.cn/n2/2019/1231/c192237-33678978.html.

      ²⁸This is according to the official uncorrected and unadjusted data, which were probably the only data available to the decision-makers at the time.

      ²⁹https://finance.sina.cn/2020-01-28/detail-iihnzahk6800693.d.html.

      ³⁰http://wjw.hubei.gov.cn/bmdt/ztzl/fkxxgzbdgrfyyq/xxfb/202001/t20200122_2013896.shtml.

      ³¹https://baijiahao.baidu.com/s?id=1656690466064388235&wfr=spider&for=pc.

      ³²http://www.xizang.gov.cn/zwgk/xxfb/gsgg_428/202001/t20200130_131215.html.

      ³³http://www.nhc.gov.cn/wjw/mtbd/202003/e0d5f8a773b54fc39113988dbcb19136.shtml.

      ³⁴http://www.xinhuanet.com/energy/2020-02/05/c_1125533467.htm.

      ³⁵http://www.xinhuanet.com/energy/2020-02/05/c_1125533467.htm.

      ³⁶http://www.xinhuanet.com/video/2020-02/03/c_1210460324.htm.

      ³⁷For a more detailed description of development, key characteristics, internal facilities and essential functions of Fangcang hospitals, see Chen, et al. (2020).

      ³⁸http://www.xinhuanet.com/photo/2020-02/06/c_1125536130.htm.

      ³⁹http://www.hubei.gov.cn/zhuanti/2020/gzxxgzbd/sz/202003/t20200311_2178738.shtml.

      ⁴⁰https://dy.163.com/article/F7UMI3A8053469LG.html;NTESwebSI=9C58243BAB9D47837DAC7CAC6F6C55CD.hz-subscribe-web-docker-cm-online-rpqqn-8gfzd-di16l-678598t4xgp-8081.

      ⁴¹https://baijiahao.baidu.com/s?id=1664096741532047780&wfr=spider&for=pc.

      ⁴²More detailed information on the resumption of production, schooling and work is reported by Sina News. https://news.sina.cn/project/fy2020/resume.d.html?&cu_pos=0000&cu_domain=news&cu_type=article&ivk_sa=1023197a.

      ⁴³https://www.sohu.com/a/370889425_120059183.

      ⁴⁴https://www.thepaper.cn/newsDetail_forward_6114455.

      ⁴⁵http://leaders.people.com.cn/n1/2020/0325/c58278-31646937.html.

      ⁴⁶https://news.china.com/domestic/945/20200501/38166917.html.