Fig. 1.

New confirmed COVID-19 cases in Wuhan from Jan 25 to April 11. The original data are from National Health Commission of the People's Republic of China (http://www.nhc.gov.cn/wjw/index.shtml) and Wuhan Municipal Health commission http://wjw.wuhan.gov.cn/). Although city lockdown and home quarantine was carried out from February 23, the number of new confirmed COVID cases per day continues to grow rapidly. However, this situation was clearly under control since the implementation of centralized isolation on February 5. Two weeks later, the vast majority of the first batch of isolated patients were discharged from Fangcang (FC) hospitals, correspondingly, the number of new cases began to drop sharply day by day. A significant increase of cases was observed on February 12, as the clinical diagnosis cases involved in the new confirmed cases.