1. COVID-19 Response, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
2. Department of International Health, Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland , USA
3. Division of Child and Adolescent Health, Department of Pediatrics, Columbia University Irving Medical Center , New York, New York , USA
4. Department of Population and Family Health, Mailman School of Public Health, Columbia University Irving Medical Center , New York, New York , USA
5. Division of Public Health, Department of Family and Preventive Medicine, University of Utah School of Medicine , Salt Lake City, Utah , USA
6. Abt Associates , Cambridge, Massachusetts , USA