Before revision:  In this paper, confirmed cases of healthcare workers were used to analyze the impact of under-reporting on the spatiotemporal distribution of COVID-19  . The results show that: (1) the  estimated peak infection time of the reported cases lags behind the actual peak infection time .
After revision:  In this paper, confirmed cases of healthcare workers were used to analyze the impact of under-reporting on the spatiotemporal distribution of COVID-19 . The results show that: (1) the lognormal distribution was the most suitable to describe the evolution of epidemic with time. (2) The estimated peak infection time of the reported cases lags behind the actual peak infection time .