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.
After revision:  (2) the estimated peak infection time of the infection peak estimated by 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.