Figure 3.

Relationship between IL-10 production and CD4 T cell division (stimulation index) of each donor in response to three pools of relatively conserved peptides of Plasmodium falciparum erythrocyte membrane protein-1. Each symbol represents the net concentration of IL-10 (pg/mL) after substraction of the background level in the absence of antigen, plotted against the stimulation index of CD4 T cell division.