Fig. 5: T cell immunity after bivalent immunization and XBB.1.5 infection.

A, B S-specific Th1 memory T cells in the blood (A) and BAL (B) before and after bivalent immunization and XBB.1.5 infection (n = 3–12 biological replicates per group). C, D S-specific CD8 memory T cells in the blood (C) and BAL (D) before and after bivalent immunization and XBB.1.5 infection (n = 3–12 biological replicates per group). Data is presented as arithmetic mean ± SEM (A–D). Source data are provided as a Source Data file.