Avian Flu Update
New outbreaks of bird flu have been reported in France, other areas in Europe and in Africa in recent weeks. Scientists concede there's much to learn about the virulent virus and how it spreads. An update on Avian flu.
special advisor to the director general, World Organization for Animal Health
Director of the National Institute of Allergy and Infectious Diseases/NIH
professor and director, Wildlife Health Center, University of California, Davis