The United States Geological Survey West Nile Virus mapping website can also be used to study the geographic distribution of bird infections. Counties shown in pink in the map below have documented cases of West Nile Virus in birds during calendar year 2004. Counties shown in light blue were sampled for West Nile Virus in birds.
See the
2004 Cases of West Nile Virus in Birds Map at the USGS website.
# posted by MapWatch @ Monday, April 18, 2005
