View clinical trials related to Hepatitis B.
Filter by:The purpose of the study is as follows: - To evaluate the persistence of antibodies and the presence of immune memory induced by a 3-dose primary vaccination with Tritanrix™-HepB/Hib-MenAC (three formulations) in the study DTPwHB/HibMenACTT001 (CPMS No. 759346/001) by giving unconjugated PRP, PSA and PSC at 10 months age to one subset of subjects. - To evaluate the persistence of all antibodies pertaining to primary vaccination and the booster response to Tritanrix™-HepB/Hib2.5 vaccine or Tritanrix™-HepB/Hib-MenAC vaccine at 15-18 months age in the other subset of subjects.
The purpose of the study is to demonstrate consistent results in 3 production lots of Hib-MenAC vaccine when extemporaneously mixed with Tritanrix™-HepB and administered as a single injection, with respect to immunogenicity, safety and reactogenicity. Tritanrix™-HepB/Hiberix™ given alone and Wyeth Lederle's meningococcal C conjugate vaccine (Meningitec™), given concomitantly with Tritanrix™-HepB/Hiberix™ will be used as benchmark vaccines for all antigens except for MenA. The immunogenicity of MenA will also be evaluated.
The purpose of this study is to compare the reactogenicity & safety of Tritanrix™-HepB/Hib-MenAC vaccine to the international standard of care, Tritanrix™-HepB/Hiberix™.
This study will only include infants born to mothers who are tested as seronegative for human immunodeficiency virus (HIV) & hepatitis B surface antigen (HBsAg). The purpose of this study is to demonstrate in infants who received a birth dose of hepatitis B vaccine that Tritanrix™-HepB/Hib-MenAC vaccine is at least as good as Tritanrix™-HepB/Hiberix™ with respect to immunogenicity of the hepatitis B antigen.
This study is designed to compare the efficacy and safety of adefovir dipivoxil 10 mg with lamivudine 100 mg in Japanese patients with compensated chronic hepatitis B over 52-week periods.
In this study, infants who were previously vaccinated with hepatitis B vaccine at birth will be randomly allocated into two groups: - one group of subjects will receive diphtheria, tetanus, acellular pertussis- hepatitis B virus-inactivated poliovirus/Haemophilus influenzae type b (DTPa-HBV-IPV/Hib) vaccine at 6-10-14 weeks of age - the second group of subjects will receive DTPa-HBV-IPV/Hib vaccine at 2-4-6 months of age
To demonstrate that the immune response to hepatitis B antigen of the DTaP-IPV-Hep B-PRP~T is non-inferior to that of the association of PENTAXIM™ and ENGERIX B® one month after a three dose (2-3-4 month) primary series. Immunogenicity - To assess pre- and post-primary series - To assess pre- and post-booster series.
To demonstrate that DTaP-IPV-HB-PRP~T combined vaccine does not induce a higher incidence rate of high fever than Tritanrix-HepB/Hib™ and Oral Polio Vaccine (OPV) after any of the three vaccinations at 2, 4, and 6 months of age for each subject. To evaluate the overall safety in terms of: Any solicited adverse reactions in the first 7 days after each injection, Any adverse events and reactions in the first 30 days after each injection, Any serious adverse events during the trial. Immunogenicity: To document the immune response to Hepatitis B antigen of the three batches of the investigational DTaP-IPV-HB-PRP~T vaccine.
Booster and immune memory study
This study explores the efficacy, safety and tolerability of tenofovir DF (TDF) 300 mg once daily monotherapy versus the combination of emtricitabine 200 mg plus tenofovir DF 300 mg (FTC/TDF) once daily in subjects currently being treated with adefovir dipivoxil (Hepsera) for chronic hepatitis B who have persistent viral replication (detectable hepatitis B virus deoxyribonucleic acid [HBV DNA]). Subjects with confirmed (within 4 weeks) plasma HBV DNA ≥ 400 copies/mL during double blind treatment at Week 24 or any time thereafter have the option of receiving 12 weeks of open-label FTC/TDF which may be continued through the end of the 168-week treatment period if there is a virologic response (HBV DNA < 400 copies/mL). Alternatively, subjects with confirmed HBV DNA < 400 copies/mL at or any time after Week 24 of double-blind treatment may continue blinded therapy up to Week 168 at the discretion of the investigator. If, in the investigator's opinion, it is felt that continued blinded treatment beyond 24 weeks in subjects with confirmed HBV DNA ≥ 400 copies/mL is not beneficial, the subject may discontinue the study and begin commercially available HBV therapy rather than initiate open-label FTC/TDF.