Jennifer B. Unger, Ph.D. is a Professor of Population and Public Health Sciences at the University of Southern California Keck School of Medicine. Her research focuses on the psychological, social, and cultural influences on health-risk and health-protective behaviors among diverse populations. She and her colleagues have conducted longitudinal studies of acculturation, cultural stress, and substance use among Hispanic adolescents, highlighting the role of discrimination in health-risk behaviors. Her research also has examined cultural influences on tobacco use among American Indian adolescents, Chinese adolescents, and African American adults and neighborhood influences on adolescent cannabis use. She has collaborated on the design and evaluation of fotonovelas and telenovelas about secondhand smoke exposure in multiunit housing; diabetes; asthma; immunization; and kidney transplantation. During the COVID-19 pandemic, she served as Associate Director of the USC Coronavirus Pandemic Research Center, which conducted studies of vaccine hesitancy among Los Angeles residents and USC students, staff, and faculty. She is a Project Leader in the USC Tobacco Center of Regulatory Science (TCORS), where she studies diffusion of messages about emerging tobacco products to vulnerable populations through social media. She has served as Program Leader of the Cancer Control program at the USC Norris Comprehensive Cancer Center. She is currently Vice Chair for Faculty Development for the Department of Population and Public Health Sciences and Director of the Ph.D. program in Population and Public Health Sciences / Health Behavior Research.