Dr. Anthony Fauci: director, National Institute of Allergy and Infectious Diseases at the National Institutes of Health.
Martin Blaser: director, Human Microbiome Program at NYU. He is author of the book, "Missing Microbes: How The Overuse of Antibiotics is Fueling Our Modern Plagues." He is the former chair of medicine at NYU and president of the Infectious Diseases Society of America.