IFNL1 and chronic hepatitis C virus infection: A recent study, investigated the levels of IL-29 and IL-28 in patients with different outcomes of HCV infection and demonstrated that patients with chronic hepatitis C had significantly lower IL-29 serum levels than subjects who had spontaneously cleared a previous HCV infection, healthy controls and carriers of a rs12979860 C allele consistently tended to have higher IL-29 and IL-28 serum levels than subjects with a T/T genotype in all study groups (14).