Outbreaks of the Ebola virus and bird flu in recent years have underscored that public health is inseparable from people's relationships with their physical environment. Bill Frist explains why we should all be concerned about vectors of combined airborne, waterborne and food-chain contamination - no matter where they occur.

William H. Frist - Senator Bill Frist, heart and lung transplant surgeon and former Majority Leader of the U.S. Senate, is the Distinguished Schultz Visiting Professor of Public and International Affairs at Princeton University. He is focused on domestic health reform, the basic science of heart transplantation, global health policy, health care disparities, information technology, medical mission work in Sudan, genocide in Darfur, the health of the mountain gorilla, and HIV. He graduated from Princeton majoring in health policy at the Woodrow Wilson School and Harvard Medical School, completing surgical residency at Massachusetts General Hospital and heart transplantation fellowship at Stanford. He is board certified in general surgery and heart and lung surgery. He has performed over 150 heart and lung transplants, has authored 100 peer-reviewed medical articles, over 400 newspaper articles, and 5 books (on bioterrorism, transplantation). His board service includes Save the Children, Committee on Conscience (U.S. Holocaust Museum), Smithsonian Museum of Natural History, CSIS.
Stewart Simonson - Stewart Simonson is Vice President for Global Public Health Preparedness at the Constella Group, charged with oversight and strategic expansion of the company's preparedness programs. Prior to joining Constella, Dr. Simonson served as Assistant Secretary for Public Health Emergency Preparedness at the U.S. Department of Health and Human Services (HHS), where he was the secretary's principal adviser on bioterrorism and other public health emergency matters. While at HHS, he also coordinated the public health preparedness activities of the Centers for Disease Control and Prevention, the Food and Drug