WEST NILE VIRUS:
Blood Banks in a 'Race Against the Mosquitoes'
Jennifer Couzin
Public health agencies and companies are racing against the clock to protect the North American blood supply from West Nile virus, which is expected to reappear soon after a winter hiatus. The mosquito-borne disease is dormant in cold months, but a score of infections linked to blood transfusions last fall prompted a rush effort to design a rapid and sensitive blood test.