Challenge dose of hepatitis B vaccine in subjects who previously received Engerix™-B vaccine
Trial overview
Number of participants with immunological response to challenge dose in terms of anti-hepatitis B surface antigen (anti-HBs) antibody concentration
Timeframe: 30 days post-challenge dose
Number of participants with anti-HBs antibody concentrations above the cut-off value
Timeframe: 30 days post-challenge dose
Concentration of anti-HBs antibodies
Timeframe: 30 days post-challenge dose
Number of participants reporting solicited local symptoms
Timeframe: During the 4-day follow-up period (Day 0-3) after the challenge dose
Number of participants reporting solicited general symptoms
Timeframe: During the 4-day follow-up period (Day 0-3) after the challenge dose
Number of participants reporting unsolicited adverse events (AE)
Timeframe: During the 31-day follow-up period (Day 0-30) after the challenge dose
Number of participants reporting serious adverse events (SAE)
Timeframe: During the 31-day follow-up period (Day 0-30) after the challenge dose
- Subjects who the investigator believes that they can and will comply with the requirements of the protocol.
- A male or female who had received complete primary vaccination course of hepatitis B vaccine in the primary study
- Use of any investigational/non-registered drug or vaccine other than the study vaccine within 30 days preceding the hepatitis B vaccine challenge dose or planned use during the study period.
- Chronic administration (more than 14 days) of immunosuppressants other immune-modifying drugs within six months prior to the hepatitis B vaccine challenge dose.
- A male or female who had received complete primary vaccination course of hepatitis B vaccine in the primary study
- Written informed consent obtained from the subject and/or parent/guardian of the subject.
- Healthy subjects as established by medical history and clinical examination before entering into the study.
- If the subject is female, she must be of non-childbearing potential or if she is of childbearing potential, she must practice adequate contraception for 30 days prior to vaccination, have a negative pregnancy test and continue such precautions for 2 months after the hepatitis B challenge dose.
Subjects who the investigator believes that they can and will comply with the requirements of the protocol.
- Chronic administration (more than 14 days) of immunosuppressants other immune-modifying drugs within six months prior to the hepatitis B vaccine challenge dose.
- Planned administration/ administration of a vaccine not foreseen by the study protocol during the period starting from 30 days before the hepatitis B vaccine challenge dose and ending 30 days after.
- Subjects who received an additional dose of hepatitis B vaccine outside the context of the study between the primary vaccination course and the hepatitis B challenge vaccination visit.
- Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational product.
- History of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
- Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
- Acute disease at the time of enrolment.
- Acute or chronic, clinically significant hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.
- Administration of immunoglobulins and/or any blood products within the three months preceding the hepatitis B vaccine challenge dose or planned administration during the study period (one month).
- Pregnant or lactating female.
- Female planning to become pregnant or planning to discontinue contraceptive precautions.
Use of any investigational/non-registered drug or vaccine other than the study vaccine within 30 days preceding the hepatitis B vaccine challenge dose or planned use during the study period.
Trial location(s)
Study documents
If you wish to request for full study report, please contact - [email protected]
Results overview
Results posted on ClinicalTrials.gov
Plain language summaries
Plain language summaries of clinical trial results for Phase 2-4 clinical trials that were initiated on or after January 2022 will be posted by GSK within one year following study completion.