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Crystal is a Senior Scholar at the Johns Hopkins Center for Health Security and Assistant Professor in the Department of Environmental Health and Engineering at the Johns Hopkins Bloomberg School of Public Health. Her research focuses on risk assessment, crisis and risk-based decision making, public health and healthcare preparedness and response, biodefense, and pandemic preparedness. Crystal leads a number of projects aimed at reducing global catastrophic biological risks (GCBRs), including projects on technological solutions and forecasting. She earned a DrPH in Health Policy and Management in 2017, and an MPH in 2009, from the Johns Hopkins Bloomberg School of Public Health. She earned a BA in molecular, cellular, and developmental biology in 2004 from the University of Colorado at Boulder