A and B) Autocorrelation function (ACF) and Partial ACF (PACF) plot of original dengue incidence. C and D) ACF and PACF plot of integrated dengue incidence. E and F) ACF and PACF of residuals after applying a SARIMA (0, 1, 1) (0, 1, 1)52 model. The X-axis gives the number of lags in weeks and, the y-axis, the value of the correlation coefficient comprised between -1 and 1. Dotted lines indicate 95% confidence interval.