Barry Levy completed an internal medicine residency at University Hospital and the Beth Israel Hospital in Boston, and a preventive medicine residency at the Centers for Disease Control. He is board certified in internal medicine and occupational medicine. He is a consultant in occupational and environmental health and an adjunct professor of public health at Tufts University School of Medicine. He previously worked as a medical epidemiologist with the CDC, a professor and director of the occupational health program at the University of Massachusetts Medical School, and as a director of international health programs. He served as president of the American Public Health Association. Levy has written many published papers on occupational health and public health, and has co-edited books on occupational and environmental health, mastering public health, climate change and public health, and the impact of war, terrorism, and social injustice on public health. Levy’s Passover Seder Symbols Song has been viewed over 900,000 times on YouTube.