Figure 2.

Box plot analysis of T cell proliferation (a) MIP-1α (b) and MIP-1β (c) production in PBMC from seropositive individuals. PHA-activated fresh PBMC were cultured for 48 h, and T cell proliferation was evaluated by a ³H-thymidine incorporation test. MIP-1α and MIP-1β were measured in the culture SN by ELISA. Shown are groups of seropositive individuals with: CD4⁺ T cell counts >500 per mm³ (▧); with CD4⁺ T cells <250 per mm³ (▪); seropositive at an early stage (░⃞); and nonprogressors (□). Horizontal bars = median and vertical bars = SD. The box limits correspond to the medium 50% percentage of each group.