Fig. 1

ETS forecast assessment (a) and estimation (b) of the ARI monthly-IRx1000 person-day, seasons 2010 – 2020. Series contains original data; Fitted Train and Fitted Test are referred to the parameters estimation and validation, respectively; Fitted overall are the results of the validated models application; Forecast and the correspondent 95% confidence interval explain the pandemic years prevision (March 2020 – February 2022). Abbreviations: ETS, Error, Trend and Seasonality; ARI, Acute Respiratory Infection; IR, Incidence Rate