Title:
Immunological memory to SARS-CoV-2 assessed for greater than six months after infection
Authors:
Jennifer M. Dan, Jose Mateus, Yu Kato, Kathryn M. Hastie, Caterina E. Faliti, Sydney I. Ramirez, April Frazier, Esther Dawen Yu, Alba Grifoni, Stephen A. Rawlings, Bjoern Peters, Florian Krammer, Viviana Simon, Erica Ollmann Saphire, Davey M. Smith, Daniela Weiskopf, Alessandro Sette & Shane Crotty
Published:
bioRxiv, 16 November 2020
[Keep in mind that this article is a preprint and not yet peer reviewed.]
Abstract:
Understanding immune memory to SARS-CoV-2 is critical for improving diagnostics and vaccines, and for assessing the likely future course of the pandemic. We analyzed multiple compartments of circulating immune memory to SARS-CoV-2 in 185 COVID-19 cases, including 41 cases at ≥6 months post-infection. Spike IgG was relatively stable over 6+ months. Spike-specific memory B cells were more abundant at 6 months than at 1 month. SARS-CoV-2-specific CD4+ T cells and CD8+ T cells declined with a half-life of 3-5 months. By studying antibody, memory B cell, CD4+ T cell, and CD8+ T cell memory to SARS-CoV-2 in an integrated manner, we observed that each component of SARS-CoV-2 immune memory exhibited distinct kinetics.