Before revision:  The infection time interval of the epidemic in Wuhan was approximately 63.6 days, not 45.6 days estimated by reported cases, and the infection time interval of the epidemic in Hubei (except Wuhan) was about 58.8 days, not 40.8 days estimated by reported cases. ( 3  ) Although the number of reported cases is lower than the actual number of cases, a high spatial correlation exists between the cumulatively reported cases and the actual situation.
After revision:  The infection time interval of the healthcare worker cases. ( 3 ) Although the number of reported cases is lower than the actual number of cases, a high spatial correlation exists between the cumulatively reported cases and the actual situation.