Data Visualization of Google Flu searches
This graph demonstrates the incidence of flu related search terms used on Google in the United States and compares them with New Zealand over time. Taking into account the seasonal nature of flu queries (people tend to be more interested in winter) you can see the initial spike in America from the 2003 influenza A subtype H5N1 ("Bird Flu") outbreak, then again in 2009 with the influenza H1N1 ("Swine Flu") pandemic.
