Hong Kong Flu/Polly Guests: Anthony Fauci Director National Institute of Allergy and Infectious Diseases Bethesda, Maryland Lee Silver Author Remaking Eden: Cloning and Beyond in a Brave New World (Avon Books) Professor of Genetics Princeton University Princeton, New Jersey Health officials are grappling with news of at least six cases, two of them fatal, of a dangerous strain of the flu. The cases mark the first time this strain, normally found in chickens, has made the jump from bird to human. Could this be the beginning of a worldwide epidemic? We'll talk about the virus, and what's being done about it, in this hour. We'll also discuss a new report that scientists have used cloning techniques to genetically engineer sheep to produce a human blood coagulant used to treat hemophilia.