Figure 4

Inter-assay correlations. (A and B) Correlation of tetramer staining and CFC in fresh-shipped and cryopreserved PBMC samples, respectively. (C and D) Correlation of ELISPOT and CFC in fresh-shipped and cryopreserved PBMC samples, respectively, with CFC results reported as number of IFNγ⁺ cells per 10⁵ PBMC. In panels C-D, the mean of 6 replicates is shown for all ELISPOT data. Correlation coefficients (r) are shown for all data as well as for CMV seropositive donors only. Open symbols represent CMV seronegative donors; closed symbols, seropositive donors (*, CMV serostatus unknown). The diagonal line represents the line of perfect agreement between the assays.