Reconstitution of humoral immunity. (A) Reconstitution of B cells after GT (left: absolute values; right: relative to baseline). (B) WASp expression in B-cell subsets (percentage of WASp⁺ cells) measured by flow cytometry (2 years after GT). (C) Percentage of unswitched memory B cells after GT. (D) Percentage of class-switched memory B cells after GT. (E) Percentage of MZ-like B cells after GT. (F) Evolution of IgM levels after GT. Asterisks (∗) indicate values after chemotherapy. (G) Isohemagglutinin titers (before and 4-5 years after GT).