Fitted daily hospitalization cases and cumulative mortality (training: blue + test: red) using SSIR-HCD with step function. For hospitalization training, reopening phase I, II(a), and II(b) had MAE = 98.40, MAE = 72.24, and MAE = 55.43, respectively. For mortality training, reopening phase I, II(a), and II(b) had training MAE = 13.10, MAE = 12.70, and MAE = 69.47, respectively. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)