Longitudinal tracking of immune responses against SARS-CoV-2 can provide insight into mechanisms of immune dysfunction in COVID-19. Mathew et al. carried out deep profiling of the T cell and B cell compartments in peripheral blood of patients with COVID-19, convalescent donors and healthy controls, using high-dimensional cytometry and multiplexed cytokine analyses. By overlaying immune and clinical features, the study identifies temporal patterns in populations of activated plasmablasts, effector memory T cells and CD4+ follicular T cells. Unsupervised cluster projection identifies three ‘immunotypes’ with distinct COVID-19 severity outcomes. Notably, one subgroup has CD4+ T cell and plasmablast activation associated with severe COVID-19; another subgroup has minimal or no lymphocyte response. This study underscores the various immune trajectories in COVID-19 and may explain differences in the response to immunosuppression.
Mathew, D. et al. Deep immune profiling of COVID-19 patients reveals patient heterogeneity and distinct immunotypes with implications for therapeutic interventions. Preprint at bioRxiv https://doi.org/10.1101/2020.05.20.106401 (2020)
The author declares no competing interests.
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Hegde, S. Many paths to COVID-19 lymphocyte dysfunction. Nat Rev Immunol 20, 408 (2020). https://doi.org/10.1038/s41577-020-0361-y