Figure 4.

Results of Experiment 2 (shipped whole blood). IFNγ-positive cells in response to SEB or CMV pp65 peptide mix are expressed as a percentage of CD4⁺ or CD8⁺ T cells. Results from each site are indicated as a circle, with median responses for each sample (105, 1040, and 1090) indicated by a horizontal bar. The C.V. for each sample is listed across the top of each panel, along with the mean C.V. for that set of samples.