Number of swine flu cases per county.  This file is similar to Swine flu infection exponent by county June 2009.svg, but replaces the dataset used to make that figure with that collected through the Flu Tracker network by June 19, 2009."H1N1 Incidents 22:55 EDT 19 June 2009 (county aggregate)"   Utah, Virginia, and Minnesota are colored according to health service zones made up of several counties, each of which is colored by the average value - average below 1.0 is not colored.  See "references and notes" below for full details.  The color scheme is green -&gt; red -&gt; black with successive shades beginning at powers of 2 (1, 2, 3-4, 5-8 ... to 1024-2048 for Chicago and New York).  See legend below.  This file is based on the public domain blank U.S. map with counties labeled by FIPS code, file:USA Counties with FIPS and names.svg.  It can be colored by opening the .svg in a text editor and adding FIPS codes before the appropriate fill color.
Swine_flu_infection_exponent_by_county_June_2009.svg
Swine_flu_infection_exponent_by_county_June_2009.svg: *USA_counties_FIPS_text_addressable.svg: Mike Serfas
derivative work: Mike Serfas (talk)
derivative work: Mike Serfas (talk)