Extended Data Fig. 6. Cellular immune responses to Omicron by intracellular cytokine staining assays.
Spike-specific IFN-γ, TNF-α, and IL-2 CD8+ and CD4+ T cell responses by intracellular cytokine staining assays at month 8 following final vaccination with Ad26.COV2.S (N = 20). Responses were measured against the SARS-CoV-2 WA1/2020, B.1.617.2 (Delta), and B.1.1.529 (Omicron) variants. Medians (red bars) are depicted and numerically shown.