Concentrations of IL-17A, IL-17F, IL-22, CXCL1, and CXCL2 in serum (S) samples obtained from tick-borne encephalitis patients on admission to hospital are shown horizontal axes and in cerebrospinal fluid (CSF) samples obtained simultaneously on vertical axes (expressed in pg/ml). The gene discussed is CXCL2; the disease is tick-borne encephalitis.