Abstract:Hepatitis B virus (HBV) infection is one of the most serious public health problems.HBV infection could lead to hepatitis B,and even further develop into hepatic cirrhosis and hepatocellular carcinoma.Interferon lambda (IFN-λ) is a member of the interferon (IFN) family and an important cytokine for antiviral defense.There are four members in IFN-λ family,including IFN-λ1,IFN-λ2,IFN-λ3,and IFN-λ4.The genetic polymorphisms in the IFN-λ genes are associated with HBV replication and treatment response of HBV patients.In this review,we summarized the roles of genetic polymorphisms of the IFN-λ genes played in HBV infection,disease progression and treatment,with the aim to better understand their function.This review could serve as a reference for the HBV prevention and treatment of HBV patients,as well as for future clinical usage.