Public Health Grand Rounds is a monthly presentation series offered by the Office of the Associate Director for Science. This series was created to foster discussion on major public health issues and to encourage action based on the latest scientific findings. Each session focuses on the particular challenges related to a specific health topic. In addition to highlighting what CDC is already doing to address these public health challenges, experts in the chosen field explore cutting-edge research, present new evidence, and discuss the potential impact of different interventions. Grand Rounds sessions also discuss recommendations for future research and practice.