Before revision:  (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. (4) Although the number of reported cases was lower than the actual number of cases, a high spatial correlation existed between the cumulatively reported cases and healthcare worker cases .
After revision:  (3) The impact of under-reporting cases on the early stages of the pandemic was greater than that on its later stages , and the infection duration estimated by the reported cases in Hubei (excluding Wuhan) may be 12.1 days shorter than the actual number of cases, a high spatial correlation existed between the cumulatively reported cases and healthcare worker cases .