Global health experts warn that avian flu threatens to become a global pandemic. Diane talks with top medical and public health experts about avian flu and what's being done to head off a possible crisis.
Director of the National Institute of Allergy and Infectious Diseases/NIH
chief of the Centers for Disease Control and Prevention influenza branch, and director of the World Health Organization's Collaborative Center for Influenza Reference and Research
staff reporter of "The Wall Street Journal"