Martin J. Blaser is the Muriel and George Singer Professor of Medicine, Professor of Microbiology, and Director of the Human Microbiome Program at the NYU School of Medicine. He served as Chair of the Department of Medicine at NYU from 2000-2012. A physician and microbiologist, Dr. Blaser is interested in understanding the relationships we have with our persistently colonizing bacteria. His work over 30 years focused on particular organisms, including Campylobacter species and Helicobacter pylori, which also are model systems for understanding the interactions of residential bacteria with their human hosts. Over the last 15 years, he has been actively studying the relationship of the human microbiome with health and with such important diseases as asthma, obesity, diabetes, and allergies. Over the course of his career, Dr. Blaser has served as the advisor for a large number of students, post-doctoral fellows, and junior faculty. He served as President of the Infectious Diseases Society of America, Chair of the Board of Scientific Counselors of the National Cancer Institute, Chair of the Advisory Board for Clinical Research of the National Institutes of Health, and on the Scientific Advisory Board of the Doris Duke Charitable Foundation. He was elected to the National Academy of Medicine and the American Academy for Arts and Sciences. He holds 25 U.S. patents relating to his research, and has authored over 540 original articles. Recently, he wrote “Missing Microbes”, a book targeted to general audiences. He now is serving as the Chair of the Presidential Advisory Council for Combating Antibiotic-Resistant Bacteria.