Baylor College of Medicine, Harvard University - Brigham and Women’s Hospital, Meridian Clinical Research, Duke University - Duke Human Vaccine Institute, Government of the United States of America - Vaccine Research Center, University of Texas Medical Branch-Galveston - The Sealy Institute for Vaccine Sciences, Government of the United States of America - VA Greater Los Angeles Healthcare System (GLA), Rutgers, The State University of New Jersey - New Jersey Medical School, Lynn Health Science Institute (Lynn Institute), DM Clinical Research - Texas Center for Drug Development (TCDD), DM Clinical Research, Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc., Moderna, Inc. and Independent