Jonathan M. Samet, MD, MS, a pulmonary physician and epidemiologist, is Dean of the Colorado School of Public Health. He was elected to the National Academy of Medicine, and holds a bachelor’s degree from Harvard College, an MD from the University of Rochester and a master’s degree from the Harvard School of Public Health. His current research focuses on the health risks of inhaled pollutants—particles and ozone in outdoor air and indoor pollutants including secondhand smoke and radon. He has also investigated the occurrence and causes of cancer and respiratory diseases, emphasizing the risks of active and passive smoking. For several decades, he has been involved in global health, focusing on tobacco control, air pollution, and chronic disease prevention.