Figure 3
From: Analysing Twitter and web queries for flu trend prediction
Flu trend prediction. Prediction of flu incidence rate in Portugal for the period from December 2012 to April 2013. The models trained with data from the previous flu season were used to generate the prediction. Stacked areas indicate the minimum, average and maximum values registered by the Influenzanet project for each week. The incidence rate reported by the European Influenza Surveillance Network (EISN) is also shown (right axis).