Efficacy and Durability of Hepatitis A Vaccination in Patients With Advanced Fibrosis and Cirrhosis
The hepatitis A virus (HAV) is a significant global public health concern. The hepatitis A virus is transmitted primarily by the faecal-oral route, leading to acute hepatitis. Symptoms include low-grade fever, anorexia, jaundice, and typically resolve without complications.

However, HAV infection in patients with chronic liver disease, especially those over 50 years old, may result in more severe outcomes, including fulminant hepatitis, with a higher mortality rate compared to the general population

HAV vaccination is a cornerstone of prevention, especially in high-risk groups. Currently, there is a recommendation to vaccinate patients with chronic liver disease against HAV infection. However, these patients often have compromised immune responses, leading to lower vaccine efficacy compared to the general population.

The goal of this randomized controlled trial is to compare the efficacy and safety of the standard 2-dose (0, 6 months) hepatitis A vaccination regimen with an intensive 3-dose (0, 1, 6 months) schedule in patients with advanced fibrosis and cirrhosis.

The main questions it aims to answer are:

Compared the seroconversion rate of the standard 2-dose (0, 6 months) hepatitis A vaccination regimen versus the intensive 3-dose (0, 1, 6 months) hepatitis A vaccination regimen in patients with advanced fibrosis and cirrhosis.
Compared the antibody levels against the hepatitis A virus (Anti-HAV IgG) of the standard 2-dose (0, 6 months) hepatitis A vaccination regimen versus the intensive 3-dose (0, 1, 6 months) hepatitis A vaccination regimen in patients with advanced fibrosis and cirrhosis.
- EligibilityCriteria: Inclusion Criteria:  Age ≥ 18 years Confirmed advance fibrosis (F3) or cirrhotic (F4) status (radiologic finding or liver stiffness measurement or pathological report) Negative anti-HAV IgM, IgG at baseline  Exclusion Criteria:  Positive anti-HAV IgG at baseline Autoimmune hepatitis Current hepatocellular carcinoma Active other malignancies Presence of antibodies against Human Immunodeficiency Virus Received immunosuppressive drugs Pregnancy or lactation Decompensated cirrhosis with MELD ≥ 15 Chronic illness or bedridden patient who cannot travel to hospital Lack of consent to participate in the study - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - MaximumAge: 70 Years - StdAgeList: Adult, Older Adult