IL15 and hemorrhagic fever with renal syndrome: Results showed that the levels of plasma IL-15 in the acute phase of HFRS patients were higher than that in the healthy donors (5.256 ± 0.610 pg/ml vs. 3.492 ± 0.174 pg/ml, p<0.001) and were also higher than that in the convalescent phase of HFRS patients (3.258 ± 0.193 pg/ml, p<0.01, Figure 3A).