View clinical trials related to Hepatitis B.
Filter by:Mother-to-child transmission (MTCT) is the most common mode of perpetuating chronic hepatitis B virus (HBV) infection in endemic countries. Many studies have demonstrated antepartum anti-viral therapy (AVT) is a advisable option to reduce mother-to-child transmission and the risk of vaccination breakthrough in infants who received passive-active immunoprophylaxis. However, several controversies over antiviral treatment have not been resolved, that is, optimal duration, effect of postpartum therapy, and risk of postpartum alanine aminotransferase (ALT) flare after withdrawal. Will the risk of postpartum hepatitis flares increase after short-term AVT in late pregnancy for maternal HBV infection is discontinued? Is there any correlation between postpartum hepatitis flares and withdrawal time? Will the proportion of postpartum flares be reduced if extending the duration of AVT after delivery? There is an urgent need in this area. This study mainly investigated the safety of antiviral therapy in preventing HBV mother-to-child transmission in pregnant women after discontinuation.
The purpose of this study is to evaluate the safety, tolerability, and reactogenicity of escalating doses of JNJ-64300535 delivered via electroporation-mediated intramuscular injection in nucleos(t)ide analogs (NA)-treated chronic hepatitis B (CHB) participants.
Background: Cirrhotic patients have an increased risk of infections. In these patients is important to prevent hepatitis B virus (HBV) infection, as it may cause a deterioration of liver function. However, HBV vaccine efficacy in this group of patients is lower than in healthy population. Despite increasing standard doses to double doses or administering an accelerated pattern, the response to HBV vaccination remains suboptimal. For this reason, an alternative strategy may be using vaccines with novel adjuvants such as Fendrix® or the recombinant vaccine HBVAXPRO®. Aim: To assess the adjuvanted HBV vaccine (Fendrix ®) efficacy in patients with chronic liver disease and to understand the kinetics of anti-HBs titers over time in patients who respond to vaccination. Methods: Prospective and multicenter study. Serological markers of HBV will be assessed prospectively in consecutive patients with non-cirrhotic liver disease (permanent abnormal liver blood tests > six months; elastogram ≥8 kilopascal (kPa); serum markers of fibrosis (APRI or FIB-4 ≥ F2); ultrasound changes suggesting chronic liver disease) and cirrhotic patients (diagnosed by liver biopsy and/or non-invasive methods: clinical, blood tests and ultrasound). Seronegative patients will receive four doses of Fendrix ® at 0,1, 2 and 6 months. Antibodies against HBV superficial antigen (anti-HBs) will be determined at 2 months +/- 10 days, six months and one year after having received the fourth dose of the vaccine (to see kinetics). The study will differentiate between responders and non-responders to the vaccine: adequate immunity to HBV will be defined as anti-HBs higher than > 10mUI/mL (standard definition of seroconversion) and> 100mUI/mL. Investigators will evaluate the factors that influence the response, kinetics and safety of the vaccination in patients with chronic liver disease and cirrhosis.
The purpose of this study is to evaluate the safety and tolerability of JNJ-440 in healthy and Chronic Hepatitis B (CHB) participants after single and multiple doses; and to evaluate the pharmacokinetic (PK) of JNJ-440 in healthy participants and in CHB participants following single and multiple dose regimens, administered alone (healthy participants and CHB participants).
This is a local, prospective observational study (regulatory post marketing surveillance) to access the safety and effectiveness of Baraclude in Korean pediatric patients with chronic HBV infection who are between the ages of 2 and less than 16 years.
The aim of this study was to evaluate the current prevalence and risk factors of hepatitis B virus (HBV) infection in a multi-ethnic neighbourhood situated in Middle Limburg, Belgium. Additionally, the investigators will determine linkage of care in hepatitis B surface antigen (HBsAg) positive subjects.
In the current study, the investigators study the efficacy of the HBAI20 vaccine to induce seroprotection in registered non-responders (adults who were previously vaccinated with the HBVaxPro-10μg but did not achieve seroprotection). The study will further assess the safety of the HBAI20 vaccine in comparison with HBVaxPro-10μg.
Health workers with biological risk in their tasks, who have been vaccinated as non-responders to conventional vaccination against Hepatitis B. To provide Health workers-staff with an additional protection tool against hepatitis B infection. To evaluate the efficacy of the adjuvanted vaccine in healthy nonresponders to conventional hepatitis B vaccine.
A Controlled Trial to Assess the Lot-to-lot Consistency of Sci-B-Vac™ in Adults
This study is a double-blind randomized controlled trial designed to establish the non-inferiority of Sci-B-Vac® compared to Engerix-B® in adults ≥ 18 years old and the superiority of Sci-B-Vac® compared to Engerix-B® in ≥ 45 years old.