Demographic and Clinical Factors Associated With SARS-CoV-2 Spike 1 Antibody Response Among Vaccinated US Adults: the C4R Study oleh John S. Kim, Yifei Sun, Pallavi Balte, Mary Cushman, Rebekah Boyle, Russell P. Tracy, Linda M. Styer, Taison D. Bell, Michaela R. Anderson, Norrina B. Allen, Pamela J. Schreiner, Russell P. Bowler, David A. Schwartz, Joyce S. Lee, Vanessa Xanthakis, Margaret F. Doyle, Elizabeth A. Regan, Barry J. Make, Alka M. Kanaya, Sally E. Wenzel, Josef Coresh, Carmen R. Isasi, Laura M. Raffield, Mitchell S. V. Elkind, Virginia J. Howard, Victor E. Ortega, Prescott Woodruff, Shelley A. Cole, Joel M. Henderson, Nicholas J. Mantis, Monica M. Parker, Ryan T. Demmer, Elizabeth C. Oelsner