Cases of West Nile virus in US, by county, 2001-2006
Cases of West Nile virus in US, by county, 2001-2006
Prevalence of West Nile virus in US, by county, 2001-2006. Prevalence is number of cases per 100,000 people.
Prevalence of West Nile virus in US, by county, 2001-2006. Prevalence is number of cases per 100,000 people.