Final 2009 West Nile Virus Viremic Blood Donor
Activity in the United States

This map reflects surveillance findings occurring between January 1, 2009 through December 31, 2009 as reported to CDC's ArboNET system for public distribution by state and local health departments.

A total of 116 presumptively viremic blood donors (PVD) have been reported to CDC's ArboNET surveillance program through state and local health departments. A PVD is a person who was asymptomatic at the time of donating blood (people with symptoms are deferred from donating) through a blood collection agency, but whose blood tested positive in preliminary tests when screened for the presence of West Nile virus. PVDs are followed up by the blood agency to verify their infection with additional tests. Some PVDs do go on to develop symptoms after donation, at which point they would be included in the count of human disease cases by their state.
Click for more information on blood screening.

Data table:
Presumptively Viremic Blood Donors (PVDs) have been reported to CDC ArboNET for public distribution for 2009 in Arizona, California, Colorado, District of Columbia, Georgia, Idaho, Indiana, Iowa, Kentucky, Maryland, Michigan, Mississippi, Nebraska, Nevada, New Jersey, New Mexico, Oklahoma, Oregon, South Dakota, Texas, Virginia, Washington, and Wyoming.