Dengue patients showed lower concentrations of IL-2 than controls (67.94 ± 3.75 pg/ml versus 71.59 ± 1.1 pg/ml; P < 0.001), but no significant differences in IL-2 between DF and DHF were found (67.86 ± 3.97 pg/ml versus 68.23 ± 2.96 pg/ml, resp.; Figure 1(a)). Here, IL2 is linked to dengue disease.