To detect influence of Th17 response on HSCs during HBV-LF, we cultured HSCs (1×105/well) in contact manner with CD4+CD25− cells (1×104/well) from CHB patients (n = 6) with or without adding anti-IL-17 antibody (10 μg/mL) and recombinant IL-17 at various concentrations (1, 3, 5 ng/mL) for 6 days. This evidence concerns the gene IL17A and Lassa fever.