The residual, histogram, and density plots corresponding to the best model for predicting the number of infections and deaths in Alpha and Delta variants of COVID-19 in Asia.

Top down: the first row is corresponding to the number of infections in Alpha variant, the second row is corresponding to the number of deaths in Alpha variant, the third row is corresponding to the number of infections in Delta variant, and the fourth row is corresponding to the number of deaths in Delta variant. Further, from left to right: the second column depicts the residual plots, the third column illustrates the histograms, and the fourth column depicts the density plots.