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Proliferation of in vitro-stimulated peripheral blood mononuclear cells (PBMCs). Percentage of cellular phenotype proliferating in response to 203 antigen for (A) CD4-expressing population, (B) CD8-expressing population, (C) γδ T-cell receptor (γδ TCR)-expressing population, and (D) B cell- or CD21-expressing population. Mean (n = 6) + SEM; an asterisk (*) indicates a significant difference (P < 0.05) between control and vaccine groups within a time point (week).
