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Characterization of Ag-specific CD8+ T cells during study participation. Phenotypic analysis of Ag-specific CD8+ T cells at baseline, day 4, and day 28. Significant increases in Ki67 expression were observed on day 4, returning to baseline on day 28. PD-1, CD127, and CD45RO/CD27 expression did not change significantly after rhIL-7 administration.
