The vaccine market has long been dominated by a public health community determined to provide mass vaccination at very low prices. The market has also been plagued by alarming shortages: the flu vaccine in the 2003-2004 flu season and childhood vaccines several times in recent years. At this conference, four experts will offer their perspectives on how to improve public policies toward vaccine supply, with emphasis on the roles of the industry, the medical community, the Centers for Disease Control, and the Food and Drug Administration.