Fig. 2From: Modeling analysis reveals the transmission trend of COVID-19 and control efficiency of human interventionFitting results on relation between the daily increase rate of cumulative cases and time (A) or cumulative cases (B) using nonlinear Eq. 4 (also see Table 2). In theory, the daily increase rate should be greater or equal to zero. Thus, we did not show the negative values produced by model fittingBack to article page