Before revision:  Using the data set provided by the National Health Commission of the People's Republic of China (NHC) [ 2 ], we show that the one-day prediction errors for the numbers of confirmed cases are  less than 3  %DIF < except the day when the definition of the number of confirmed cases is changed.
After revision:  Using the data set provided by the National Health Commission of the People's Republic of China [ 2 ], we show that the one-day prediction errors for the numbers of confirmed cases are less than 3  %DIF < except the day when the definition of the number of confirmed cases is changed.