Government of the United States of America - Centers for Disease Control and Prevention (CDC), Government of the United States of America - National Center for Immunization and Respiratory Diseases, Vanderbilt University Medical Center - Vanderbilt Institute for Clinical and Translational Research, University of Michigan at Ann Arbor, University of Michigan at Ann Arbor, Government of the United States of America - Centers for Disease Control and Prevention (CDC), Yale University - Department of Emergency Medicine, University of Colorado at Denver - Department of Emergency Medicine, Intermountain Medical Center, Intermountain Medical Center, Baylor Scott & White Health, Texas A&M University, University of Massachusetts Worcester - UMass Chan Medical School, Johns Hopkins University, Hennepin Healthcare, Yeshiva University - Montefiore Medical Center, University of Washington, Oregon Health and Science University, Cleveland Clinic, Stanford University, University of California, Los Angeles (UCLA), University of California, Los Angeles (UCLA), Emory University, Northwestern University, Ohio State University (OSU), Henry Ford Health System, University of Arizona, University of Utah Health Sciences Center, Vanderbilt University, Vanderbilt University, Government of the United States of America - Centers for Disease Control and Prevention (CDC), Government of the United States of America - Centers for Disease Control and Prevention (CDC), Government of the United States of America - Centers for Disease Control and Prevention (CDC), Government of the United States of America - CDC COVID-19 Response, Government of the United States of America - Centers for Disease Control and Prevention (CDC), Vanderbilt University - Medical Center, Vanderbilt University - Department of Pediatrics, Vanderbilt University - Medical Center, University of Michigan at Ann Arbor and Government of the United States of America - Centers for Disease Control and Prevention (CDC)