Hepatitis B Vaccine

Collect basic information of patients before antiviral treatment and when HBsAg disappears, and divide them into three groups A, B, and C based on baseline anti HBs titers after informed consent. During the follow-up period of all patients, clinical biochemistry, virology (HBVDNA, HBVRNA), serological indicators (HBsAg, anti HBs, HBeAg, anti HBe, HBcrAg, anti HBc), AFP, Fibroscan, liver imaging examinations will be conducted every 3-6 months, and blood samples will be retained for monitoring the frequency of immune cells (pDC, Treg) and the expression of functional molecules, as well as cytokines (IFN - γ, IP-10, IL-10, and TGF - β). Observe the sustained response rate and recurrence rate of virological and serological indicators, as well as the incidence of hepatitis and liver cancer during the follow-up period.

This is Phase I, randomized, open-label, active-controlled study to evaluate the safety, tolerability, and immunogenicity of a hepatitis B vaccine administered trans-dermally via microneedle array patch (MAP) compared to the intra-muscular (IM) hepatitis B vaccine (Euvax B™), administered at Day (D) 0, Week (W) 4, W26 among healthy adults aged 19 to 40 years in the Republic of Korea.