West Nile Statistics
In 2002, there were 4 reported cases of mother-to-child transmission of West Nile virus reported to the CDC (Centers for Disease Control).
In 2003, 74 women acquired West Nile virus illness while pregnant. As of May 10, 2004, 62 of these women had delivered live infants, 2 had voluntary abortions, 5 miscarried in the first trimester, and 5 had not yet delivered.
The length of time that the West Nile virus has been in the United States is unknown, but scientists believe the virus has probably been in the eastern United States since the early summer of 1999, or possibly longer.
The continued expansion of West Nile virus in the United States indicates that it is permanently established in the Western Hemisphere.