Figure 3From: Measuring naturally acquired immune responses to candidate malaria vaccine antigens in Ghanaian adultsThe frequency distribution of the medium controls (sfc/m PBMC) for all the CSP and AMA1 assays. The numbers of medium controls from each assay are distributed against the ELISpot activity (sfc/m). The distribution of medium controls from all assays using CSP or AMA1 peptide pools, and the total using both antigens, show the same distribution.Back to article page