Abstract
Background: Chronic hepatitis B (HBV) and C virus (HCV) infections represent significant public health issues internationally. HBV vaccination has high sero-conversion rates in patients with mild to moderate chronic liver disease but has reduced efficacy in advanced stages.Aim: to evaluate the efficacy of hepatitis B vaccination in HCV-related chronic liver disease and identify possible factors that may contribute to hypo-responsiveness in those patients.Methods: Our study was a retrospective observational clinical study carried out at the tropical medicine department. It was conducted on 500 individuals (400 chronic HCV patients and 100 healthy controls). In-dividuals were divided into 5 groups: A (control group), B (cirrhotic patient not receiving treatment), C (chronic hepatitis patients receiving treatment), D (cirrhotic patients receiving treatment), and E (HCC patients receiving treatment). All individuals were subjected for comprehensive history taking, clinical examination, laboratory investigations, and assessment of anti-HBs titer.Results: There is an inverse relationship between the level of anti-HBs Abs and the duration of vaccine. Diabetes and presence of cirrhosis have statistically significant relationship with serum anti-HBs Abs titer (P 1/4 0.007). Oral DAAs therapy is associated with reduced response to HBV vaccine (only 31.75% of the patients were protected).Conclusion: HCV infection and its complications significantly impair HBV vaccine response. Levels of anti-HBs Abs decline progressively with increasing duration from the last dose in immunization schedule of HBV vac-cine. Diabetes and presence of cirrhosis being the main risk factors for vaccine hypo-responsiveness, also oral DAAs therapy is associated with reduced response to HBV vaccine.