Each dot represents the absolute twitter flu counts for a city. The size of the dot is in the range of 1 to 10 and is proportional to the twitter flu count. All cities with twitter flu counts less than or equal to 10 have the size 1 and all the cities with twitter flu counts greater than or equal to 100 have size 10.
Each dot represents the severity of flu status for a city. The size of the dot is in the range of 1 to 10 and is normalized based on the city population. The baseline of each dot is caluclated as the city population divided by 50,000.

Other Visualizations

Daily Flu Results Per State

Weekly Flu Results Per State

Weekly United States Heatmap