Distribution centers around the country began receiving shipments of the much anticipated H1N1 flu vaccine this week. Those costs, as well as the economic blow of closed schools and lost productivity, could set back the fragile U.S. economy.

Amid predictions of a new H1N1 swine flu outbreak, health officials warn that children going back to school are especially at risk. Gwen Ifill talks to Dr. Anne Schuchat, the director of the National Center for Immunization and Respiratory Diseases…