As illustrated in Figures 1 and 2, the PBL of NPC patients produced significantly more IL-2 (2105 ± 1152 pg/ml) and IL-10 (1280 ± 727 pg/ml) than the PBL of healthy donors (1286 ± 452 pg/ml, p = 0,022 for IL-2 and 793 ± 325 pg/ml, p = 0,016 for IL-10). This evidence concerns the gene IL2 and nasopharyngeal carcinoma.