A Study on the Immune Response and Safety of the Second Dose of an Investigational Chickenpox Vaccine When Given to Healthy Children 3 Months After a First Dose at 12 to 15 Months of Age

NCT ID: NCT06806137

Last Updated: 2025-12-04

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE3

Total Enrollment

600 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-05-15

Study Completion Date

2027-05-03

Brief Summary

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The purpose of this study is to evaluate the immune response and safety of GSKs investigational varicella vaccine (VNS Vaccine) compared to an already approved varicella vaccine, Varivax (VV), when administered as second dose to healthy children. 3 months after first dose at 12 to 15 months. The study will be conducted in children who have not previously contracted varicella or received a varicella vaccination.

Detailed Description

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Conditions

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Chickenpox

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

SINGLE

Participants
Observer-blind study.

Study Groups

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VV-VV Group

Participants receive 2 doses of a VV vaccine on Day 1 and Day 91. 1 dose of measles, mumps, and rubella (MMR) vaccine, 1 dose of hepatitis A vaccine (HAV), and 1 dose of PCV (either PCV 13 or Vaxneuvance or PCV 20) on Day 1. A second dose of MMR vaccine will be co-administered to the participants in countries where a second dose of MMR is recommended at 15 to 18 months of age, as per national immunization schedule.

Group Type ACTIVE_COMPARATOR

Marketed varicella vaccine

Intervention Type BIOLOGICAL

Marketed varicella vaccine administered subcutaneously.

MMR vaccine

Intervention Type BIOLOGICAL

MMR vaccine co-administered subcutaneously or intramuscularly.

Hepatitis A vaccine

Intervention Type BIOLOGICAL

Hepatitis A vaccine co-administered intramuscularly.

PCV (pneumococcal conjugate vaccine) 13

Intervention Type BIOLOGICAL

The 13-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

PCV 20

Intervention Type BIOLOGICAL

The 20-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Vaxneuvance

Intervention Type BIOLOGICAL

The Vaxneuvance (15-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

VNS-VNS Group

Participants receive 2 doses of a VNS vaccine on Day 1 and Day 91. 1 doses of MMR vaccine, 1 dose of HAV vaccine, and 1 dose of PCV (either PCV 13, Vaxneuvance or PCV 20) on Day 1. A second dose of MMR vaccine will be co-administered to the participants in countries where second dose of MMR is recommended at 15 to 18 months of age, as per national immunization schedule.

Group Type EXPERIMENTAL

Investigational varicella vaccine

Intervention Type BIOLOGICAL

Investigational varicella vaccine administered subcutaneously.

MMR vaccine

Intervention Type BIOLOGICAL

MMR vaccine co-administered subcutaneously or intramuscularly.

Hepatitis A vaccine

Intervention Type BIOLOGICAL

Hepatitis A vaccine co-administered intramuscularly.

PCV (pneumococcal conjugate vaccine) 13

Intervention Type BIOLOGICAL

The 13-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

PCV 20

Intervention Type BIOLOGICAL

The 20-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Vaxneuvance

Intervention Type BIOLOGICAL

The Vaxneuvance (15-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

VV-VNS Group

Participants receive 1 dose of VV vaccine on Day 1, 1 dose of VNS Vaccine on Day 91. 1 doses of MMR vaccine, 1 dose of HAV, and 1 dose of PCV (either PCV 13, Vaxneuvance or PCV 20) on Day 1. A second dose of MMR vaccine will be co-administered to the participants in countries where second dose of MMR is recommended at 15 to 18 months of age, as per national immunization schedule.

Group Type EXPERIMENTAL

Investigational varicella vaccine

Intervention Type BIOLOGICAL

Investigational varicella vaccine administered subcutaneously.

Marketed varicella vaccine

Intervention Type BIOLOGICAL

Marketed varicella vaccine administered subcutaneously.

MMR vaccine

Intervention Type BIOLOGICAL

MMR vaccine co-administered subcutaneously or intramuscularly.

Hepatitis A vaccine

Intervention Type BIOLOGICAL

Hepatitis A vaccine co-administered intramuscularly.

PCV (pneumococcal conjugate vaccine) 13

Intervention Type BIOLOGICAL

The 13-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

PCV 20

Intervention Type BIOLOGICAL

The 20-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Vaxneuvance

Intervention Type BIOLOGICAL

The Vaxneuvance (15-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Interventions

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Investigational varicella vaccine

Investigational varicella vaccine administered subcutaneously.

Intervention Type BIOLOGICAL

Marketed varicella vaccine

Marketed varicella vaccine administered subcutaneously.

Intervention Type BIOLOGICAL

MMR vaccine

MMR vaccine co-administered subcutaneously or intramuscularly.

Intervention Type BIOLOGICAL

Hepatitis A vaccine

Hepatitis A vaccine co-administered intramuscularly.

Intervention Type BIOLOGICAL

PCV (pneumococcal conjugate vaccine) 13

The 13-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Intervention Type BIOLOGICAL

PCV 20

The 20-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Intervention Type BIOLOGICAL

Vaxneuvance

The Vaxneuvance (15-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

Intervention Type BIOLOGICAL

Eligibility Criteria

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Inclusion Criteria

* Participant's parent(s)/Legally acceptable representative (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 participant's parent(s)/LAR(s) prior to performance of any study-specific procedure.
* Healthy participants as established by medical history and clinical examination before entering into the study.
* A male or female between, and including, 12 to 15 months of age (i.e., from the day of 1 year birthday until the day before 16 months of age) at the time of the administration of the first study interventions.
* Only for children in countries where PCV is recommended at 12 to 15 months of age as per national immunization schedule and provided as part of the study interventions: participant who previously received the primary series of PCV in the first year of life with last dose at least 60 days prior to study entry.

Exclusion Criteria

* History of any reaction or hypersensitivity likely to be exacerbated by any component of the study interventions.
* Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
* Hypersensitivity to latex.
* Major congenital defects, as assessed by the investigator.
* Recurrent history of uncontrolled neurological disorders or seizures.
* History of varicella disease.
* Active untreated tuberculosis.
* Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the participant due to participation in the study.
* Use of any investigational or non-registered product (drug, vaccine or invasive medical device) other than the study interventions during the period beginning 30 days before the first dose of study interventions (Day -29 to Day 1), or their planned use during the study period.
* Planned administration of a vaccine in the period starting 30 days before the first dose and ending 43 days after the second dose of study interventions administration (Visit 3), with the exception of inactivated influenza vaccine which may be given at any time during the study and administered at a different location than the study interventions.
* Chronic administration of immune-modifying drugs (defined as more than 14 consecutive days in total) and/or planned use of long-acting immune-modifying treatments at any time up to the end of the study.

* Up to 90 days prior to the study intervention administration:

i) For corticosteroids, this will mean prednisone equivalent \>=0.5 mg/kg/day with maximum of 20 mg/day for pediatric participants. Inhaled and topical steroids are allowed.

ii) Administration of immunoglobulins and/or any blood products or plasma derivatives.

* Up to 180 days prior to study interventions administration: long acting immune-modifying drugs including among others immunotherapy (e.g., tumor necrosis factor-inhibitors), monoclonal antibodies (except the ones not interfering with the immune response to the study vaccinese.g., nirsevimab), antitumoral medication.
* Previous vaccination against measles, mumps, and rubella.
* Previous vaccination against hepatitis A virus.
* Previous vaccination against varicella virus.
* Only for children in countries where PCV is recommended at 12 to 15 months of age as per national immunization schedule and provided as part of the study interventions, participant who previously received a booster dose of any PCV.
* Concurrently participating in another clinical study, at any time during the study period, in which the participant has been or will be exposed to an investigational or a non-investigational intervention (drug/invasive medical device).
* Child in care.
* Any study personnel's immediate dependents, family, or household members.
* Participants with the following high-risk individuals in their household:

i) Immunocompromised individuals. ii) Pregnant women without documented history of varicella. iii) Newborn infants of mothers without documented history of varicella. iv) Newborn infants born less than (\<) 28 weeks of gestation.
Minimum Eligible Age

12 Months

Maximum Eligible Age

15 Months

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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GlaxoSmithKline

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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GSK Investigational Site

Salvaleón de Higüey, La Altagracia Province, Dominican Republic

Site Status RECRUITING

GSK Investigational Site

Constanza, , Dominican Republic

Site Status RECRUITING

GSK Investigational Site

Santo Domingo Oeste, , Dominican Republic

Site Status RECRUITING

Countries

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Dominican Republic

Central Contacts

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US GSK Clinical Trials Call Center

Role: CONTACT

877-379-3718

EU GSK Clinical Trials Call Center

Role: CONTACT

+44 (0) 20 89904466

Facility Contacts

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US GSK Clinical Trials Call Center

Role: primary

877-379-3718

EU GSK Clinical Trials Call Centre

Role: backup

+44 (0) 20 8990 4466

US GSK Clinical Trials Call Center

Role: primary

877-379-3718

EU GSK Clinical Trials Call Centre

Role: backup

+44 (0) 20 8990 4466

US GSK Clinical Trials Call Center

Role: primary

877-379-3718

EU GSK Clinical Trials Call Centre

Role: backup

+44 (0) 20 8990 4466

Other Identifiers

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2024-516635-27-00

Identifier Type: OTHER

Identifier Source: secondary_id

214002

Identifier Type: -

Identifier Source: org_study_id

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