Reassessing Google Flu Trends Data for Detection of Seasonal and Pandemic Influenza: A Comparative Epidemiological Study at Three Geographic Scales
Table 3
Comparison of epidemic intensity during the 2009 A/H1N1 influenza pandemic and the 2012/2013 seasonal A/H3N2 epidemic as measured by Google Flu Trends (GFT) and public health influenza-like illness (ILI) surveillance at the national (United States), regional (Mid-Atlantic) and local (New York City) levels.