Last year the West Nile virus sickened more than 4,000 people in this country. More than 250 people died. Experts say it’s impossible to predict what might happen this year. A panel joins Diane to talk about what’s know and not known about this disease and its spread.
- Michael Turell Entomologist at the United States Army Medical Research Institute of Infectious Diseases
- Stephen Hall Biomedical journalist, editor and contributing writer for the "New York Times Magazine"