affiliation not provided to SSRN, affiliation not provided to SSRN, Case Western Reserve University - University Hospitals Cleveland Medical Center, affiliation not provided to SSRN, Arizona State University (ASU), affiliation not provided to SSRN, University of Michigan at Ann Arbor, Kaiser Permanente Washington Health Research Institute, Kaiser Permanente Washington Health Research Institute, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Pittsburgh - School of Medicine, University of Pittsburgh - School of Medicine, Baylor Scott & White Health, Baylor Scott & White Health, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Government of the United States of America - CDC COVID-19 Response, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Government of the United States of America - CDC COVID-19 Response and Duke University - Duke Human Vaccine Institute