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Human T-cell responses to nGroES and rGroES. PBMC from eight healthy, BCG-vaccinated individuals were stimulated with no antigen (control) or with ST-CF, nGroES, and rGroES at the concentration 5 μg/ml. The results are shown as individual proliferative (A) and IFN-γ (B) responses after stimulation. The variation between individual wells was less than 10% of the mean.
