1. Crystal Watson, DrPH, MPH, and Tara Kirk Sell, PhD, MA, are Senior Scholars at the Johns Hopkins University Center for Health Security and Assistant Professors in the Department of Environmental Health and Engineering at the Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland. Matthew Watson is a Senior Analyst at the Center and a Research Associate at the School of Public Health. Daniel Gastfriend, MPA, MBA, was a Visiting Scholar at the Center.