Before revision:  In this study, confirmed cases of healthcare workers are considered as accurate small samples to analyze the impact of under-reporting on the spatiotemporal distribution of COVID-19 from three perspectives: parameter estimation , spatiotemporal correlation, and spatiotemporal lag .
After revision:  In this study, confirmed cases of healthcare workers are considered as accurate small samples to analyze the impact of under-reporting on COVID-19 from three perspectives: parameter estimation , spatiotemporal correlation, and spatiotemporal lag .