Hepatitis B Vaccination and Management

Introduction to Hepatitis B Infection

Hepatitis B vaccination has no role in treating existing Hepatitis B virus (HBV) infections and is not recommended for individuals already infected with HBV, as stated by the American Association for the Study of Liver Diseases 1, 2
Treatment for chronic HBV infection focuses on suppressing viral replication and preventing disease progression through antiviral medications, not vaccines, according to the European Association for the Study of the Liver 1

The primary therapeutic options for chronic HBV include nucleos(t)ide analogues (NAs) for long-term viral suppression, as recommended by the American Association for the Study of Liver Diseases 1
Pegylated interferon (PegIFN) is used as an immunomodulatory approach for chronic HBV infection, as suggested by the European Association for the Study of the Liver 1
Prevention of disease progression to cirrhosis and hepatocellular carcinoma is a key treatment goal, as stated by the American Association for the Study of Liver Diseases 1
Achieving HBsAg loss (functional cure) is an ideal treatment outcome, according to the European Association for the Study of the Liver 1

HBV vaccines contain only the hepatitis B surface antigen (HBsAg), which stimulates antibody production in uninfected individuals, as explained by the Centers for Disease Control and Prevention 3, 4
In already infected individuals, the virus has established persistent infection through formation of covalently closed circular DNA (cccDNA) in hepatocytes, as described by the American Association for the Study of Liver Diseases 1
Integration of viral DNA into the host genome is another mechanism of persistent HBV infection, as reported by the European Association for the Study of the Liver 1

Sexual contacts of infected individuals should be vaccinated, as recommended by the American Association for the Study of Liver Diseases 5
Household members should be screened and vaccinated if susceptible, according to the Centers for Disease Control and Prevention 5
Infected individuals should use barrier protection during sexual intercourse with non-immune partners, as advised by the American Association for the Study of Liver Diseases 5
Pregnant women with HBV should ensure their newborns receive hepatitis B immune globulin (HBIG) and hepatitis B vaccine immediately after delivery, as recommended by the American College of Obstetricians and Gynecologists 5
This combination is 95% effective in preventing perinatal transmission, as reported by the Centers for Disease Control and Prevention 5

Novel direct-acting antivirals targeting various steps of the HBV lifecycle are being developed, as reported by the American Association for the Study of Liver Diseases 1, 6
Immunotherapeutic agents to restore immune response to HBV are under investigation, according to the European Association for the Study of the Liver 1
Combination approaches targeting both viral replication and immune response are being explored, as suggested by the American Association for the Study of Liver Diseases 1
Therapeutic vaccines (different from preventive vaccines) are under clinical evaluation, as reported by the European Association for the Study of the Liver 1

Mistaking HBV vaccination as a treatment for existing infection is a common pitfall, as warned by the American Association for the Study of Liver Diseases 2
Failing to vaccinate close contacts of infected individuals is another common mistake, according to the Centers for Disease Control and Prevention 5