Before revision:  (2) the estimated peak infection time of the  reported cases lagged the peak infection time of the healthcare worker cases , and the estimated infection time interval of the reported cases was smaller than that of the healthcare worker cases. (3) The impact of under-reporting cases on the early stages of the pandemic was greater than that on its later stages , and the impact on the early onset area was greater than that on the late onset area.
After revision:  (2) the estimated peak infection time of the reported cases lagged the peak infection time of the healthcare worker cases , and the estimated infection time interval of the reported cases in Wuhan may be 16 days shorter than the actual infection duration. The infection peak estimated by the reported cases in Hubei (excluding Wuhan) may lag the actual infection peak by 1~2 days , and the impact on the early onset area was greater than that on the late onset area.