Expression of IL-7Rα correlates with expression of CD27. (A) Relation between IL-7Rα expression and CD27 in the total CD8⁺ T-cell pool (n = 57, healthy persons and patients). (B) Relation between IL-7Rα expression and CD27 within virus-specific cells. (▪) CMV-specific cells. (•) EBV-specific cells. (▵) FLU-specific cells. (○) RSV-specific cells. For each virus, measurements with the different available tetramers are shown together. Measurements are obtained from cells of 40 healthy donors and patients, all staining with one or more tetramers.