Kinetics and durability of humoral responses to SARS-CoV-2 infection and vaccination
Srivastava, K.; Carreno Quiroz, J. M.; Gleason, C.; Monahan, B.; Singh, G.; Abbad, A.; Tcheou, J.; Raskin, A.; Kleiner, G.; van Bakel, H.; Sordillo, E. M.; PARIS Study Group, ; Krammer, F. M.; Simon, V.
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We analyzed the kinetics and durability of the humoral responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and vaccination using >8,000 longitudinal samples collected over a three-year period (April 2020 - April 2023) in the New York City metropolitan area. Upon primary immunization, participants with pre-existing immunity mounted higher antibody responses faster and achieved higher steady-state levels compared to naive individuals. Antibody durability was characterized by two phases: an initial rapid decay, followed by a phase of stabilization with very slow decay resulting in an individual spike binding antibody steady state. Booster vaccination equalized the differences in antibody levels between participants with and without hybrid immunity, but the antibody titers reached decreased with each successive antigen exposure. Break-through infections increased antibody titers to similar levels as an additional vaccine dose in naive individuals. Our study provides strong evidence for the fact that SARS-CoV-2 antibody responses are long lasting, with an initial waning phase followed by a stabilization phase.
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