Meanwhile, it should be noted that the patients with mild HFRS had a higher level of serum VEGF at febrile/hypotensive and oliguric stages than that in the other three groups, but could quickly reduce to the normal level at convalescence (P > 0.05 compared with healthy control) (Figure 1(e)). The gene discussed is VEGFA; the disease is hemorrhagic fever with renal syndrome.