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GSK's Hepatitis B vaccine adjuvanted with aluminum hydroxide

Phase 1

Hepatitis B | Vaccine | Infectious Disease |GSK plc|Last Updated: Jan 15, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment122

FDA Designations

No designations recorded

Clinical trial landscape

GSK's Hepatitis B vaccine adjuvanted with aluminum hydroxide · 1 trial · 1 indication

Phase 1 1
NCT05561673A Study on the Safety and Immune Response of AS37 Together With Hepatitis B Antigen in Adults Aged 18-45 YearsHepatitis B
COMPLETED122 Analytics
PHASE1COMPLETED
A Study on the Safety and Immune Response of AS37 Together With Hepatitis B Antigen in Adults Aged 18-45 Years
Hepatitis BUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Solicited Administration Site Adverse Events (AEs) After Dose 1
Day 1 (day of administration) to Day 14

Assessed solicited administration site events after vaccination included erythema, pain, and swelling at the injection site. Any = occurrence of the event regardless of intensity grade.

Number of Participants With Solicited Administration Site AEs After Dose 2
Day 31 (day of administration) to Day 45

Assessed solicited administration site events after vaccination included erythema, pain and swelling at the injection site. Any = occurrence of the event regardless of intensity grade.

Number of Participants With Solicited Systemic AEs After Dose 1
Day 1 (day of administration) to Day 14

Assessed solicited systemic events included fever (defined as temperature greater than or equal to (\>=) 38.0°C regardless of the location of measurement), fatigue, myalgia, arthralgia, headache, chills, malaise, loss of appetite, nausea, vomiting, and diarrhea.

Number of Participants With Solicited Systemic AEs After Dose 2
Day 31 (day of administration) to Day 45

Assessed solicited systemic events included fever (defined as temperature \>=38.0°C regardless of the location of measurement), fatigue, myalgia, arthralgia, headache, chills, malaise, loss of appetite, nausea, vomiting, and diarrhea.

Duration in Days of Solicited Administration Site AEs After Dose 1
Day 1 (day of administration) to Day 14

Duration is the number of days in which a participant experienced the symptom within the 14-day solicited follow-up period.

Duration in Days of Solicited Administration Site AEs After Dose 2
Day 31 (day of administration) to Day 45

Duration is the number of days in which a participant experienced the symptom within the 14-day solicited follow-up period.

Duration in Days of Solicited Systemic AEs After Dose 1
Day 1 (day of administration) to Day 14

Duration is the number of days in which a participant experienced the symptom within the 14-day solicited follow-up period.

Duration in Days of Solicited Systemic AEs After Dose 2
Day 31 (day of administration) to Day 45

Duration is the number of days in which a participant experienced the symptom within the 14-day solicited follow-up period.

Number of Participants With Any Unsolicited AEs After Dose 1
Day 1 (day of administration) to Day 31

An unsolicited AE is an AE that was not included in a list of solicited events using a Participant Diary. Unsolicited events must have been spontaneously communicated by a participant who has signed the informed consent. Unsolicited AEs include both serious and non-serious AEs. Any = occurrence of the event regardless of intensity grade or relation to the study vaccination.

Number of Participants With Any Unsolicited AEs After Dose 2
Day 31 (day of administration) to Day 61

Any = occurrence of the event regardless of intensity grade or relation to the study vaccination.

Number of Participants With Serious AEs (SAEs)
Throughout the entire study period (from Day 1 to Day 361)

An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant, or is an abnormal pregnancy outcome. Any = occurrence of the SAE regardless of intensity grade or relation to the study vaccination.

Number of Participants With Medically Attended AEs (MAEs)
Throughout the entire study period (from Day 1 to Day 361)

An MAE is any AE with medically attended visits that were not routine visits for physical examination or vaccination, such as visits for hospitalization, an emergency room visit, or an otherwise unscheduled visit to or from medical personnel (medical doctor) for any reason. Any = occurrence of the MAE regardless of intensity grade or relation to the study vaccination.

Number of Participants With AEs Leading to Study Withdrawal
Throughout the entire study period (from Day 1 to Day 361)

An AE is any untoward medical occurrence (an unfavourable/unintended sign - including an abnormal laboratory finding), symptom, or disease (new or exacerbated) in a clinical study participant that is temporally associated with the study intervention. The AE may or may not be considered related to the study intervention. A participant is considered to have withdrawn from the study if no new study procedure has been performed or no new information has been collected for him/her since the date of withdrawal/last contact.

Number of Participants With Potential Mediated Immune Diseases (pIMDs)
Throughout the entire study period (from Day 1 to Day 361)

pIMDs are a subset of adverse events that include autoimmune diseases and other inflammatory and/or neurological disorders of interest which may or may not have an autoimmune aetiology. Any = occurrence of the pIMD regardless of intensity grade or relation to the study vaccination.

Mean Percent Change From Baseline (Pre-vaccination, Day 1) in Hematology and Biochemistry Parameters Post-dose 1
At Day 8 (relative to baseline [pre-vaccination Day 1])

In the analysis were included biochemistry parameters: alanine aminotransferase (ALT), aspartate aminotransferase (AST), bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, white blood cells (WBC).

Mean Percent Change From Baseline (Pre-vaccination, Day 1) in Hematology and Biochemistry Parameters Post-dose 2
At Day 38 (compared with baseline [pre-vaccination, Day 1])

In the analysis were included biochemistry parameters: ALT, AST, bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, WBC.

Number of Participants With Abnormal Hematology and Biochemistry Laboratory Parameter Values at Day 1
At Day 1 (baseline)

In the analysis were included biochemistry parameters: ALT, AST, bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, WBC. Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Number of Participants With Abnormal Hematology and Biochemistry Laboratory Parameter Values at Day 8
At Day 8

In the analysis were included biochemistry parameters: alanine aminotransferase (ALT), aspartate transaminase (AST), bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, white blood cells (WBC).Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Number of Participants With Abnormal Hematology and Biochemistry Laboratory Parameter Values at Day 31
At Day 31

In the analysis were included biochemistry parameters: alanine aminotransferase (ALT), aspartate transaminase (AST), bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, white blood cells (WBC).Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Number of Participants With Abnormal Hematology and Biochemistry Laboratory Parameter Values at Day 38
At Day 38

In the analysis were included biochemistry parameters: alanine aminotransferase (ALT), aspartate transaminase (AST), bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, white blood cells (WBC).Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Number of Participants With Abnormal Hematology and Biochemistry Laboratory Parameter Values at Day 61
At Day 61

In the analysis were included biochemistry parameters: alanine aminotransferase (ALT), aspartate transaminase (AST), bicarbonate, blood urea nitrogen, chloride, C reactive protein, creatinine, potassium, sodium; and hematology parameters: eosinophils, erythrocytes, hemoglobin, lymphocytes, platelets, monocytes, neutrophils, white blood cells (WBC).Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Secondary Endpoints

Geometric Mean Concentration (GMC) of Anti-HBs Antibody Concentrations
At Day 1, Day 31, Day 61 and Day 361
Percentage of Participants Who Seroconverted for Anti-HBs
At Day 31, Day 61 and Day 361
Percentage of Participants Seroprotected for Anti-HBs
At Day 31, Day 61 and Day 361
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
HBs-alum GroupACTIVE_COMPARATORParticipants received 3 doses of GSK's Hepatitis B (HBsAg) vaccine adjuvanted with aluminum hydroxide, at Day 1, Day 31 and Day 181.
HBs-AS03 GroupEXPERIMENTALParticipants received 2 doses of GSK's HBsAg candidate vaccine adjuvanted with GSK's AS03, adjuvant system, at Day 1 and Day 31.
HBs-AS04 GroupEXPERIMENTALParticipants received 2 doses of GSK's HBsAg vaccine adjuvanted with GSK's AS04, adjuvant system, at Day 1 and Day 31.
HBs-AS37B GroupEXPERIMENTALParticipants received 2 doses of GSK's HBsAg (20 µg) candidate vaccine adjuvanted with GSK's AS37B adjuvant system (50 µg), at Day 1 and Day 31.
HBs-AS37A GroupEXPERIMENTALParticipants received 2 doses of GSK's HBsAg (20 µg) candidate vaccine adjuvanted with GSK's AS37A adjuvant system (100 µg), at Day 1 and Day 31.

Interventions

NameTypeDescription
GSK's Hepatitis B vaccine adjuvanted with aluminum hydroxideCOMBINATION_PRODUCTThree doses of GSK's Hepatitis B vaccine adjuvanted with aluminum hydroxide administered intramuscularly in the non-dominant arm, one each at Day 1, Day 31 and Day 181.
GSK's HBsAg candidate vaccine adjuvanted with GSK's AS03 adjuvant systemBIOLOGICALTwo doses of GSK's HBsAg candidate vaccine adjuvanted with GSK's AS03 adjuvant system administered intramuscularly in the non-dominant arm, one each at Day 1 and Day 31.
GSK's Hepatitis B vaccine adjuvanted with GSK's AS04 adjuvant systemBIOLOGICALTwo doses of GSK's Hepatitis B vaccine adjuvanted with GSK's AS04 adjuvant system administered intramuscularly in the non-dominant arm, one each at Day 1 and Day 31.
GSK's HBsAg (20 μg) vaccine adjuvanted with GSK's AS37B adjuvant system (50 μg)BIOLOGICALTwo doses of GSK's HBsAg (20 μg) vaccine adjuvanted with GSK's AS37B adjuvant system (50 μg) administered intramuscularly in the non-dominant arm, one each at Day 1 and Day 31.
GSK's HBsAg (20 μg) vaccine adjuvanted with GSK's AS37A adjuvant system (100 μg)BIOLOGICALTwo doses of GSK's HBsAg (20 μg )vaccine adjuvanted with GSK's AS37A adjuvant system (100 μg) administered intramuscularly in the non-dominant arm, one each at Day 1 and Day 31.
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Eligibility Criteria

Age Range18 Years to 45 Years
SexALL
Healthy VolunteersYes
Study Sites5

Inclusion Criteria: * Participants who the investigator believe can and will comply with the requirements of the protocol. * Written informed consent obtained from the participant prior to performance of any study-specific procedure. * Healthy participants as established by medical history, clinica...

Countries:BelgiumGermanyUnited Kingdom
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