Cross-sectional vaccine responsiveness as measured by the Interferon-γ Elispot assay^*.

*The number of positive responders for each antigen at each time-point tested for each vaccination group (by route and dose) is shown. The cut-off for a positive response was 27 SFC/106 PBMC. Cumulative analysis represents a positive response at any time-point post-vaccination. Responses were measured pre-vaccination, 2 weeks post-2nd vaccination, 2 weeks post-3rd vaccination and 12 and 24 weeks post-3rd vaccination. **Numbers in parentheses represent the total subjects tested per group. ***Responses are shown for Env and Gag peptide pools representing the vaccine inserts and also for responders to any insert-derived peptide pool. Only 2 responders were detected using the polymerase (Pol) peptide pool (1 in the 108 pfu IM group and 1 in the 107 pfu ID group). ****Values for the quantitative analysis represent the corrected data values (test antigen - background). The median value [with range] for the summed responses (Env+Gag+Pol) is shown as SFC/106 PBMC.