1 Nicholas G. Reich and Evan L. Ray are with the Department of Biostatistics and Epidemiology, University of Massachusetts-Amherst. Justin Lessler is with the Department of Epidemiology, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill. Sebastian Funk is with the Centre for Mathematical Modelling of Infectious Diseases and Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK. Cecile Viboud is with the Fogarty International Center, National Institutes of Health, Bethesda, MD. Alessandro Vespignani is with the Laboratory for the Modeling of Biological and Socio-technical Systems, Northeastern University, Boston, MA. Ryan J. Tibshirani is with the Department of Statistics & Data Science and the Department of Machine Learning, Carnegie Mellon University, Pittsburgh, PA. Katriona Shea and Rebecca K. Borchering are with the Department of Biology and Center for Infectious Disease Dynamics, The Pennsylvania State University, University Park. Melanie Schienle and Johannes Bracher are with the Chair of Statistics and Econometrics, Karlsruhe Institute of Technology, Karlsruhe, Germany. Michael C. Runge is with the Eastern Ecological Science Center, US Geological Survey, Laurel, MD. Roni Rosenfeld is with the Machine Learning Department, Carnegie Mellon University. Rene Niehus and Helen C. Johnson are with the European Centre for Disease Prevention and Control, Solna, Sweden. Michael A. Johansson and Matthew Biggerstaff are with the COVID-19 Response, Centers for Disease Control and Prevention, Atlanta, GA. Harry Hochheiser is with the Department of Biomedical Informatics and Intelligent Systems Program, University of Pittsburgh, Pittsburgh, PA. Lauren Gardner is with the Department of Civil and Systems Engineering, Johns Hopkins University, Baltimore, MD.