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RecruitingNCT04006808Updated Feb 27, 2026

A Study to Test GlaxoSmithKline's (GSK) Candidate Vaccine-GSK1437173A for Prevention of Shingles in Children With Kidney Transplant

A Phase 1/2 interventional study of PED-HZ/su in Herpes Zoster, sponsored by GlaxoSmithKline. Recruiting at 31 sites in 6 countries. Open to participants aged 1 Year to 17 Years. Per ClinicalTrials.gov, last updated 2026-02-27.

Sponsored by GlaxoSmithKline · Phase 1/2, Interventional, and Prevention

From the registry’s dates

  • Primary completion was expected by May 2026, 5 months ago, but the record still lists the study as recruiting.
  • Started Oct 2019; still recruiting 6 years 11 months later.
Phase
Phase 1/2
Study type
Interventional
Enrollment
184
Allocation
Randomized
Ages
1 Year to 17 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the reactogenicity, safety and immunogenicity of 2 doses of PED-HZ/su, GSK's vaccine candidate for the prevention of Herpes Zoster (HZ) in immunocompromised paediatric renal transplant recipients aged 1-17 years

02

Conditions studied

  • Herpes Zoster

Browse trials for

03

In context

Herpes Zoster

360 studies on the registry are indexed under Herpes Zoster; 60 are open to participants now.

This study's planned enrollment of 184 is below the median of 250 across 299 interventional studies indexed under Herpes Zoster.

Browse Herpes Zoster studies →

Lead sponsor

GlaxoSmithKline is the lead sponsor of 3,562 studies on the registry; 117 are open to participants now.

Of its 258 completed or terminated interventional studies of FDA-regulated products, 232 (90%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Year to 17 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subjects' parent(s)/Legally Acceptable Representative(s) [LAR(s) who, in the opinion of the investigator, can and will comply, with the requirements of the protocol
  • Written or witnessed/thumb printed informed consent obtained from the parent(s)/LAR(s) of the subject prior to performance of any study specific procedure.
  • Written informed assent obtained from the subjects when applicable according to local requirements.
  • A male or female between, and including, 1 and 17 years of age at the time of randomisation (Visit Day 1)
  • Body weight ≥ 6 kg/13.23 pounds.

  • A subject is eligible if they meet at least one of the following criteria:

    • Documented previous VZV vaccination OR
    • Medically verified varicella (with source documentation) OR
    • Seropositive for VZV prior to transplantation.
  • Subjects with renal transplant more than six months (180 days) prior randomization (Visit Day 1)
  • Subject who has received an ABO compatible allogeneic renal transplant (allograft).
  • Subject with stable renal function with stability defined as \<20% variability between the last two creatinine measurements or based on investigator opinion after review of multiple creatinine measurements.
  • Subject receiving maintenance immunosuppressive therapy for the prevention of allograft rejection for a minimum of one month (30 days) prior to randomization (Visit Day 1).

  • Female subjects of childbearing potential may be enrolled in the study, if the subject

    • has practiced adequate contraception for 30 days prior to Visit Day 1 and has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination series

Exclusion criteria

Exclusion Criteria:

Medical conditions

  • Any primary kidney disease with a high incidence of recurrent primary kidney disease within the allograft
  • Evidence of recurrent primary kidney disease within the current allograft
  • Previous allograft loss secondary to recurrent primary kidney disease
  • History of more than one organ transplanted (that is, kidney-liver, simultaneous double kidney or kidney-other organ(s) transplanted).
  • Subjects with an episode of acute allograft rejection over the six months (180 days) prior to enrolment
  • Panel Reactive Antibodies (PRA) calculated PRA (cPRA) or Calculated Reaction Frequency (cRF) score that is unknown at the time of transplant
  • VZV serostatus unknown prior to transplant
  • Subjects with advanced chronic kidney disease
  • Evidence of significant proteinuria (≥ 200 g/mol creatinine) believed to be of renal origin (an example of non-renal origin is proteinuria from mucus in a reconstructed bladder)
  • Subjects without multiple dialysis options in the event acute or chronic dialysis needed.
  • History of unstable or progressive neurological disorder.
  • Subjects ≤ 5 years of age with a history of one or more simple or complex febrile seizures
  • Subjects > 5 years with history of one or more complex febrile seizures
  • Occurrence of a varicella or HZ episode by clinical history within the 6 months (180 days) preceding Visit Day 1

  • Any autoimmune disease, with the following exceptions which do not constitute an exclusion criterion:

    • IgA nephropathy
    • Rapidly progressive glomerulonephritis
    • Membranous glomerulonephritis
    • Idiopathic Type I membranoproliferative glomerulonephritis
    • Diabetes mellitus (type 1 and 2) with diabetic nephropathy
  • Confirmed or suspected Human Immunodeficiency Virus or primary immunodeficiency disease
  • Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the subject due to participation in the study
  • History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine
  • Any condition which, in the judgement of the investigator would make intramuscular injection unsafe.
  • Atypical Haemolytic Uraemic Syndrome.

Prior/Concomitant therapy

  • Use of any investigational or non-registered product other than the study vaccine during the period starting 30 days before Visit Day 1 (Day -29 to Day -1), or planned use during the study period.
  • Subject in receipt of treatment for rejection during the six months (180 days) prior to enrolment.
  • Use of anti-CD20 or other B-cell monoclonal antibody agents within 1 year of Visit Day 1 or planned administration during the duration of the study.
  • Administration of blood products 3 months (90 days) prior to Visit Day 1 or planned administration during the duration of the study.
  • Administration of immunoglobulins 6 months (180 days) prior to Visit Day 1 or planned administration of immunoglobulins during the duration of the study.
  • Administration or planned administration of a vaccine within 30 days prior to Visit Day 1 up to Visit Month 2 with the exception of an inactivated or subunit influenza vaccine which may be given 8 days prior to or 14 days after Visit Day 1 and 8 days prior to or 14 days after Visit Month 1.
  • Previous vaccination against HZ
  • Varicella vaccination within the 6 months (180 days) preceding Visit Day 1
  • Planned administration during the study of an HZ or varicella vaccine (including an investigational or non-registered vaccine) other than the study vaccine

Prior/Concurrent clinical study experience

  • Concurrent or planned participation 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
  • available locally through compassionate use programs,
  • submitted for and pending local/country registration,
  • approved and registered for use in other countries with well-documented Summary of Product Characteristics or Prescribing Information
  • The name of the active component(s) of these immunosuppressants must be provided in the concomitant medication listing

Other exclusions

  • Child in care
  • Pregnant or lactating female
  • Female planning to become pregnant or planning to discontinue contraceptive precautions (if of childbearing potential) between one month (30 days) prior to Visit Day 1 through two months (60 days) after Visit Month 1.
  • Evidence or high suspicion, in the opinion of the investigator, of non-compliance or non-adherence to use of induction and/or maintenance immunosuppressive therapies.

  • Failure to fully complete the 7-day pre-vaccination diary card distributed at the Pre-vaccination visit

    • Completion must cover the 7 days immediately prior to randomisation (Visit Day 1).
    • Completion is defined as a minimum of 6 days completed.
    • Subjects with less than 6 days completed may be offered a new date for Visit Day 1 and the opportunity to comply with the completion of the 7-day pre-vaccination diary card prior to the new planned Visit Day 1.
  • Any study personnel or their immediate dependants, family, or household member.
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
184 participants (estimated)

Study arms

  • Experimental
    PED-HZ/su 12-17 Group

    Paediatric renal transplant recipients aged 12 to 17 years old, receiving 2 doses of the investigational vaccine (PED HZ/su)

    Biological: PED-HZ/su

  • No intervention
    Control 12-17 Group

    Paediatric renal transplant recipients aged 12 to 17 years old, not receiving the investigational vaccine but being treated according to the local standard of care

  • Experimental
    PED-HZ/su 1-11 Group

    Paediatric renal transplant recipients aged 1 to 11 years old, receiving 2 doses of the investigational vaccine (PED HZ/su). Enrolment into this group will be in a staggered manner. Following enrolment into the PED-HZ/su 12-17 group, a safety evaluation of data collected up to visit month 2 will be performed. Upon favourable outcome of the evaluation, enrolment into this group will begin.

    Biological: PED-HZ/su

  • No intervention
    Control 1-11 Group

    Paediatric renal transplant recipients aged 1 to 11 years old, not receiving the investigational vaccine but being treated according to the local standard of care

Interventions

  • BiologicalPED-HZ/su

    GSK's candidate vaccine- PED-HZ/su. is administered intramuscularly in the deltoid of the non-dominant arm, on a two-dose schedule in the two investigational groups.

06

What researchers measure

Primary outcomes

  1. Number of subjects from the interventional groups, with solicited local adverse events (AEs)

    Assessed solicited local AEs are pain, redness and swelling at the injection site. Pain includes tenderness. Note: GSK diary cards for collecting solicited local and general AEs/symptoms is different for subjects \< 6 years and ≥ 6 years. Hence the age category of 1-11 years is further split to 1-5 years and 6-11 years.

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  2. Number of subjects from the interventional groups, with solicited general AEs

    Assessed solicited general AEs among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * Gastrointestinal (GI) symptoms\*\* Assessed solicited general AEs among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain Note: GSK diary cards for collecting solicited local and general AEs/symptoms is different for subjects \< 6 years and ≥ 6 years. Hence the age category of 1-11 years is further split to 1-5 years and 6-11 years.

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  3. Number of subjects from the control groups with solicited general symptoms

    Assessed solicited general symptoms among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * GI symptoms\*\* Assessed solicited general symptoms among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain As subjects from the control group are not vaccinated, they will not complete the diary card for local solicited symptoms.

    Time frame: Within 7 days after Visit Day 1

  4. Number of subjects from the control groups with solicited general symptoms

    Assessed solicited general symptoms among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * GI symptoms\*\* Assessed solicited general symptoms among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain

    Time frame: Within 7 days after Visit Month 1

  5. Number of subjects from the interventional groups with unsolicited AEs after each vaccination

    An unsolicited AE is any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  6. Number of subjects from the control groups with unsolicited symptoms

    An unsolicited symptom is any symptom reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after Visit Day 1

  7. Number of subjects from the control groups with unsolicited symptoms

    An unsolicited symptom is any symptom reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after Visit Month 1

  8. Number of subjects with serious adverse events (SAEs), potential immune mediated diseases (pIMDs) and biopsy confirmed renal allograft rejection.

    An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity. pIMDs are sub sets of Adverse events of special interest (AESIs) that include autoimmune disease and other inflammatory and/neurological disorders of interest, which may or may not have autoimmune aetiology. The renal allograft rejections are biopsy confirmed pathophysiological changes indicative of rejection. The rejection is graded for severity and extent of histologic inflammation and injury. The reporting period for any renal allograft rejection is from Visit Day 1 to the study end (month 2).

    Time frame: From Visit Day 1 up to Visit Month 2

  9. Number of subjects from the interventional groups with seizures

    All seizures occurring within 30 days following study vaccination are reported.

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  10. Number of subjects from the non-interventional groups with seizures

    All seizures occurring within 30 days after visit day 1 are reported, for the control groups.

    Time frame: Within 30 days after Visit Day 1

  11. Number of subjects from the non-interventional groups with seizures

    All seizures occurring within 30 days of visit month 1 are reported, for the control groups

    Time frame: Within 30 days after Visit Month 1

  12. Number of subjects from the interventional groups with generalized convulsive seizures

    Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure.

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  13. Number of subjects from the non-interventional groups with generalized convulsive seizures

    Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

    Time frame: Within 7 days after Visit Day 1

  14. Number of subjects from the non-interventional groups with generalized convulsive seizures

    Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

    Time frame: Within 7 days after Visit Month 1

  15. Percentage of subjects with Anti-gE antibody concentrations in terms of Geometric Mean Concentrations (GMCs)

    The geometric mean concentration (GMC) calculations are performed by taking the anti log of the mean of the log concentration transformations. Antibody concentrations below the cut-off of the assay will be given an arbitrary value equal to half the cut-off for GMC calculation

    Time frame: At Month 2 (one-month post-dose 2)

Secondary outcomes

  1. Number of subjects with SAEs, pIMDs and biopsy confirmed renal allograft rejections from day 1 to month 13

    An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity pIMDs are sub sets of Adverse events of special interest (AESIs) that include autoimmune disease and other inflammatory and/neurological disorders of interest, which may or may not have autoimmune aetiology. The renal allograft rejections are biopsy confirmed pathophysiological changes indicative of rejection. The rejection is graded for severity and extent of histologic inflammation and injury. This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: From Visit Day 1 up to Visit Month 13

  2. Occurrence of Herpes Zoster cases

    HZ may present classically with a unilateral, dermatomal rash that is associated with pain, pruritus, allodynia or other altered sensation. In this population, disseminated HZ may occur and present with a generalized rash with systemic symptoms such as fever. All children enrolled in the trial have a history of primary VZV infection or vaccination and in the presence of immunosuppression, disseminated HZ cannot be distinguished clinically from varicella This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: From Visit Day 1 until Visit Month 13

  3. Number of subjects from the interventional pooled age group with solicited local AEs

    The pooled age group includes all subjects aged 1-17 years. The assessed local AEs solicited are: * Pain * Redness * Swelling Note: Pain includes tenderness.

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  4. Number of subjects from the interventional pooled age group with solicited general AEs

    The pooled age group includes all subjects aged 1-17 years. The assessed solicited general AEs among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * Gastrointestinal (GI) symptoms\*\* The assessed solicited general AEs among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  5. Number of subjects from the non-interventional pooled age group with solicited general symptoms

    The pooled age group includes all subjects aged 1-17 years. The assessed solicited general symptoms among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * GI symptoms\*\* The assessed solicited general symptoms among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain As subjects from the control group are not vaccinated, they will not complete the diary card for local solicited symptoms.

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  6. Number of subjects from the interventional pooled age group with unsolicited AEs after each vaccination

    The pooled age group includes all subjects aged 1-17 years. An unsolicited AE is any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  7. Number of subjects from the non-interventional pooled age group with unsolicited symptoms

    The pooled age group includes all subjects aged 1-17 years. An unsolicited symptom is any symptom reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  8. Number of subjects from the non-interventional pooled age group with unsolicited symptoms

    The pooled age group includes all subjects aged 1-17 years. An unsolicited symptom is any symptom reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

    Time frame: Within 30 days after Visit Month 1

  9. Number of subjects from the pooled age groups with any SAEs, pIMDs and biopsy confirmed renal allograft rejections

    An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity pIMDs are sub sets of Adverse events of special interest (AESIs) that include autoimmune disease and other inflammatory and/neurological disorders of interest, which may or may not have autoimmune aetiology. The renal allograft rejections are biopsy confirmed pathophysiological changes indicative of rejection. The rejection is graded for severity and extent of histologic inflammation and injury.

    Time frame: From Visit Day 1 until Visit Month 2

  10. Number of subjects from the pooled age groups with any SAEs, pIMDs and biopsy confirmed renal allograft rejections

    An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity pIMDs are sub sets of Adverse events of special interest (AESIs) that include autoimmune disease and other inflammatory and/neurological disorders of interest, which may or may not have autoimmune aetiology. The renal allograft rejections are biopsy confirmed pathophysiological changes indicative of rejection. The rejection is graded for severity and extent of histologic inflammation and injury.

    Time frame: From Visit Day 1 until Visit Month 13

  11. Number of subjects from the pooled age groups with HZ

    HZ may present classically with a unilateral, dermatomal rash that is associated with pain, pruritus, allodynia or other altered sensation. In this population, disseminated HZ may occur and present with a generalized rash with systemic symptoms such as fever. All children enrolled in the trial have a history of primary VZV infection or vaccination and in the presence of immunosuppression, disseminated HZ cannot be distinguished clinically from varicella. This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: From Visit Day 1 until Visit Month 13

  12. Number of subjects from the interventional pooled age group with seizures

    The pooled age group includes all subjects aged 1-17 years. All seizures occurring within 30 days following study vaccination are reported

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  13. Number of subjects from the non-interventional pooled age group with seizures

    The pooled age group includes all subjects aged 1-17 years. All seizures occurring with 30 days after visit day 1 are reported

    Time frame: Within 30 days after Visit Day 1

  14. Number of subjects from the non-interventional pooled age group with seizures

    The pooled age group includes all subjects aged 1-17 years. All seizures occurring with 30 days after visit month 1 are reported

    Time frame: Within 30 days after each vaccination (vaccines administered on day 1 and month 1)

  15. Number of subjects from the interventional pooled age group with generalized convulsive seizures

    The pooled age group includes all subjects aged 1-17 years. Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  16. Number of subjects from the non-interventional pooled age group with generalized convulsive seizures

    The pooled age group includes all subjects aged 1-17 years. Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

    Time frame: Within 7 days after each vaccination (vaccines administered on day 1 and month 1)

  17. Number of subjects from the non-interventional pooled age group with generalized convulsive seizures

    The pooled age group includes all subjects aged 1-17 years. Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

    Time frame: Within 7 days after Visit Month 1

  18. Vaccine Response Rate (VRR) for Anti-glycoprotein (Anti-gE) antibody concentrations

    The Vaccine Response Rate for anti-gE antibodies is defined as the percentage of subjects who have at least: * a 4-fold increase in the post-dose 2 anti-gE Ab concentration as compared to the pre-vaccination anti-gE Ab concentration, for subjects who are seropositive at baseline, or, * a 4-fold increase in the post-dose 2 anti-gE Ab concentration as compared to the anti-gE Ab cut-off value for seropositivity, for subjects who are seronegative at baseline. This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: At Month 2 and Month 13

  19. Median fold increase of anti-gE antibody concentrations

    Median fold increase in antibody concentration with 95% Confidence Interval is tabulated for the interventional groups by age strata (1-11 years and 12-17 years) This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: At Month 2 and Month 13

  20. Percentage of subjects with anti-gE antibody concentrations in terms of GMCs

    GMC calculations are performed by taking the anti log of the mean of the log concentration transformations. Antibody concentrations below the cut-off of the assay will be given an arbitrary value equal to half the cut-off for GMC calculation

    Time frame: At Day 1 (pre-vaccination) and Month 13

  21. Percentage of subjects in the interventional pooled age group, with Anti-gE antibody concentrations in terms of GMCs

    GMC calculations are performed by taking the anti log of the mean of the log concentration transformations. Antibody concentrations below the cut-off of the assay will be given an arbitrary value equal to half the cut-off for GMC calculation. Median fold increase in antibody concentration with 95% Confidence Interval is to be tabulated for the interventional groups by pooled age category (1-17 years). This outcome measure is analysed during epoch 002 (day 1 to month 2) and during epoch 003 (month 2- month 13)

    Time frame: At Day 1, Month 2 and Month 13

07

Study locations

26 of 31 sites recruiting
  • GSK Investigational Site
    Brussels, 1020, Belgium
    Recruiting
  • GSK Investigational Site
    Ghent, 9000, Belgium
    Recruiting
  • GSK Investigational Site
    Leuven, 3000, Belgium
    Recruiting
  • GSK Investigational Site
    Liège, 4000, Belgium
    Recruiting
  • GSK Investigational Site
    Bordeaux, 33000, France
    Recruiting
  • GSK Investigational Site
    Lille, 59000, France
    Recruiting
  • GSK Investigational Site
    Marseille, 13385, France
    Recruiting
  • GSK Investigational Site
    Montpellier, 34295, France
    Recruiting
  • GSK Investigational Site
    Nantes, 44093, France
    Withdrawn
  • GSK Investigational Site
    Paris, 75015, France
    Recruiting
  • GSK Investigational Site
    Paris, 75019, France
    Recruiting
  • GSK Investigational Site
    Toulouse, 31059, France
    Recruiting
  • GSK Investigational Site
    Genova, 16147, Italy
    Completed
  • GSK Investigational Site
    Milan, 20122, Italy
    Recruiting
  • GSK Investigational Site
    Padova, 35128, Italy
    Recruiting
  • GSK Investigational Site
    Roma, 00165, Italy
    Recruiting
  • GSK Investigational Site
    Torino, 10126, Italy
    Recruiting
  • GSK Investigational Site
    Gdansk, 80-952, Poland
    Recruiting
  • GSK Investigational Site
    BaracaldoVizcaya, 48903, Spain
    Recruiting
  • GSK Investigational Site
    Espluges de Llobregat, 08950, Spain
    Completed
  • GSK Investigational Site
    HebrOn, 08035, Spain
    Recruiting
  • GSK Investigational Site
    Madrid, 28007, Spain
    Recruiting
  • GSK Investigational Site
    Madrid, 28046, Spain
    Recruiting
  • GSK Investigational Site
    Seville, 41013, Spain
    Recruiting
  • GSK Investigational Site
    Birmingham, B4 6NH, United Kingdom
    Completed
  • GSK Investigational Site
    Cardiff, CF14 4XW, United Kingdom
    Completed
  • GSK Investigational Site
    Glasgow Strathclyde, G51 4TF, United Kingdom
    Recruiting
  • GSK Investigational Site
    London, WC1N 3JH, United Kingdom
    Recruiting
  • GSK Investigational Site
    Manchester, M13 9WL, United Kingdom
    Recruiting
  • GSK Investigational Site
    Nottingham, NG7 2UH, United Kingdom
    Recruiting
  • GSK Investigational Site
    Southampton, SO16 6YD, United Kingdom
    Recruiting
08

References and documents

Publications

  • Mollo A, Peri M, Lodi L, Gissi A, Lionetti P, Marrani E, Mastrolia MV, Tondo A, Tintori V, Sardi I, Indolfi G, Trapani S, Galli L, Venturini E, Astorino V, Azzari C, Ricci S. Considering recombinant herpes zoster vaccine for fragile pediatric patients: A new opportunity. Vaccine. 2025 Apr 19;53:127072. doi: 10.1016/j.vaccine.2025.127072. Epub 2025 Apr 7. PubMed 40198934 ↗

Individual participant data

Plan to share: Yes — IPD for this study will be made available via the Clinical Study Data Request site.

Supporting information: Study protocol, Sap, Icf, Csr

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 27, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04006808
Lead sponsor
GlaxoSmithKline
Responsible party
Sponsor
First posted
Jul 5, 2019
Start date
Oct 25, 2019
Primary completion
May 1, 2026 (estimated)
Completion
Mar 31, 2027 (estimated)
Last update
Feb 27, 2026

Study contacts

US GSK Clinical Trials Call Center
Contact
GSKClinicalSupportHD@gsk.com
877-379-3718
EU GSK Clinical Trials Call Center
Contact
GSKClinicalSupportHD@gsk.com
+44 (0) 20 89904466
GSK Clinical Trials
study director · GlaxoSmithKline

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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