Boxplots of net CMV IFN-g ELISpot responses from the 30 pilot study samples measured in duplicates within each of the 3 laboratories.

Inter- and intra-laboratory analysis was performed between the UVRI, IAVI Core laboratory and HVTN laboratory results. 28 of the 30 pilot study samples were also tested by UVRI. Boxes represent the interquartile range of 25–75thpercentile; bars represent the 95th percentile of IFN-g ELISpot responses. SFU = spot forming units.