1. Marcia A. Testa, Elena Savoia, and Maxwell Su are with the Department of Biostatistics and the Emergency Preparedness Research, Evaluation, & Practice (EPREP) Program, Division of Policy Translation and Leadership Development, Harvard T. H. Chan School of Public Health, Boston, MA. Paul Biddinger is with the EPREP Program and the Department of Emergency Medicine, Division of Emergency Preparedness, Massachusetts General Hospital and Harvard Medical School, Boston.