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Examples of changes in B-cell subsets in patients with COVID-19. (A,C,E) Healthy donors. (B,D,F) Patients with COVID-19. (A,B) Bm3 + Bm4 and Bm5 B-cell subsets. (C,D) Resting memory B cells (CD27+CD38−) and circulating plasma cell precursors (CD27+CD38++) (PB). (E,F) Circulating plasma cell precursors (CD24−CD38++). Colored boxes highlight target B-cell subpopulations in patients with COVID-19 and healthy donors.
