Adolescent hepatitis B vaccination. A review

Area of Science:

• Hepatology
• Immunology
• Vaccinology

Background:

• Adolescents and young adults represent a key demographic for hepatitis B virus (HBV) infection.
• Many nations have integrated HBV vaccination into adolescent immunization schedules due to varying incidence rates.
• Current HBV vaccines are highly effective, inducing durable seroprotection and demonstrating equivalent immunogenicity for most applications.

Purpose of the Study:

• To review the efficacy and application of current hepatitis B vaccines in adolescents and young adults.
• To highlight the importance of immunologic memory in maintaining long-term seroprotection against HBV.
• To address vaccination strategies and monitoring for immunocompromised individuals at risk of HBV infection.

Main Methods:

• Review of existing literature on HBV vaccine schedules and immunogenicity.
• Discussion of recent advancements in HBV vaccination, including specific regimens and combination vaccines.
• Analysis of immune response and memory in immunocompromised populations.

Main Results:

• Available HBV vaccines provide highly effective, long-term seroprotection, with immunologic memory playing a crucial role.
• Innovations include a 2-dose regimen for adolescents (11-15 years) and a combined hepatitis A and B vaccine (Twinrix).
• Immunocompromised individuals may exhibit hypo- or non-response and require post-vaccination and periodic testing of HBsAb titers.

Conclusions:

• Adolescent HBV vaccination is a critical public health strategy for long-term protection.
• Immunocompromised patients necessitate vigilant monitoring of HBsAb levels and timely booster vaccinations if titers fall below protective thresholds (<10 mIU/ml).
• Continued research and updated vaccination protocols ensure optimal HBV prevention across diverse populations.