Comparing antibody assays as correlates of protection against COVID-19 in the COVE mRNA-1273 vaccine efficacy trial

Authors: David Benkeser, David C. Montefiori, Adrian B. McDermott, Youyi Fong, Holly E. Janes, Weiping Deng, Honghong Zhou, Christopher R. Houchens, Karen Martins, Lakshmi Jayashankar, Flora Castellino, Britta Flach, Bob C. Lin, Sarah O’Connell, Charlene McDanal, Amanda Eaton, Marcella Sarzotti-Kelsoe, Yiwen Lu, Chenchen Yu, Bhavesh Borate, Lars W. P. van der Laan, Nima S. Hejazi, Avi Kenny, Marco Carone, Brian D. Williamson, Jennifer Garver, Erin Altonen, Thomas Rudge, Chuong Huynh, Jacqueline Miller, Hana M. El Sahly, Lindsey R. Baden, Sharon Frey, Elissa Malkin, Stephen A. Spector, Michele P. Andrasik, James G. Kublin, Lawrence Corey, Kathleen M. Neuzil, Lindsay N. Carpp, Rolando Pajon, Dean Follmann, Ruben O. Donis, Richard A. Koup, Peter B. Gilbert, , , ,

Published: 2023-04-19

DOI: 10.1126/scitranslmed.ade9078

Source: Full article


Abstract

The best assay or marker to define mRNA-1273 vaccine–induced antibodies as a correlate of protection (CoP) is unclear. In the COVE trial, participants received two doses of the mRNA-1273 COVID-19 vaccine or placebo. We previously assessed IgG binding antibodies to the spike protein (spike IgG) or receptor binding domain (RBD IgG) and pseudovirus neutralizing antibody 50 or 80% inhibitory dilution titer measured on day 29 or day 57, as correlates of risk (CoRs) and CoPs against symptomatic COVID-19 over 4 months after dose. Here, we assessed a new marker, live virus 50% microneutralization titer (LV-MN