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Investigational varicella vaccine_Lot 1

Phase 3

Chickenpox | Monoclonal antibody | Other |GSK plc|Last Updated: May 29, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment1,840
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06740630A Study on the Immune Response and Safety of an Investigational Chickenpox Vaccine When Given to Healthy Children 12 to 15 Months of AgePHASE3 RECRUITING 1,840Jan 10, 2025May 17, 2027May 29, 202697 United States, Belgium +9
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Study Endpoints
Primary Endpoints
Percentage of participants with seroresponse to Varicella Zoster Virus (VZV) anti-glycoprotein E (gE) Immunoglobulin (IgG) for the 3 lots of VNS vaccine groups
At Day 43

Seroresponse is defined as post-vaccination (Day 43) anti-VZV gE IgG antibody concentration greater than or equal to (\>=) 300 milli-international units per milliliter (mIU/mL) among participants who were seronegative \[(antibody concentration less than (\<) LLOQ (Lower limit of quantification)\] before vaccination. A seronegative participant is a participant whose antibody concentration is below the LLOQ of the assay. A seropositive participant is a participant whose antibody concentration is greater than or equal to the LLOQ of the assay.

Geometric Mean Concentration (GMC) of anti-VZV gE IgG for the 3 lots of VNS vaccine groups
At Day 43

Concentrations of anti-VZV gE IgG presented as GMCs and expressed in mIU/mL for each group.

Percentage of participants with seroresponse to anti-VZV gE IgG for the 3 pooled lots of VNS vaccine groups compared with the 2 pooled lots of VV groups
At Day 43

Seroresponse is defined as post-vaccination (Day 43) anti-VZV gE IgG concentration \>= 300 mIU/mL among participants who were seronegative (antibody concentration \< LLOQ) before vaccination. A seronegative participant is a participant whose antibody concentration is below the LLOQ of the assay. A seropositive participant is a participant whose antibody concentration is greater than or equal to the LLOQ of the assay.

GMCs of anti-VZV gE IgG for the 3 pooled lots of VNS vaccine groups compared with the 2 pooled lots of VV groups
At Day 43

Concentrations of anti-VZV gE IgG are presented as GMCs and expressed in mIU/mL for each group.

Secondary Endpoints
Anti-measles antibodies GMCs for the 3 pooled lots of VNS vaccine groups compared with the 2 pooled lots of VV groups
At Day 43
Anti-mumps antibodies GMCs for the 3 pooled lots of VNS vaccine groups compared with the 2 pooled lots of VV groups
At Day 43
Anti-rubella antibodies GMCs for the 3 pooled lots of VNS vaccine groups compared with the 2 pooled lots of VV groups
At Day 43
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
VNS_Lot 1 GroupEXPERIMENTALParticipants receive 1 dose of the investigational VNS vaccine of Lot 1, 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.
VNS_Lot 2 GroupEXPERIMENTALParticipants receive 1 dose of the investigational VNS vaccine of Lot 2, 1 dose of MMR vaccine, 1 dose of HAV vaccine, and 1 dose of PCV (either PCV 13 or Vaxneuvance or PCV 20) on Day 1.
VNS_Lot 3 GroupEXPERIMENTALParticipants receive 1 dose of the investigational VNS vaccine of Lot 3, 1 dose of MMR vaccine, 1 dose of HAV vaccine, and 1 dose of PCV (either PCV 13 or Vaxneuvance or PCV 20) on Day 1.
VV_Lot 1 GroupACTIVE_COMPARATORParticipants receive 1 dose of a marketed varicella vaccine (VV) of Lot 1, 1 dose of MMR vaccine, 1 dose of HAV vaccine, and 1 dose of PCV (either PCV 13 or Vaxneuvance or PCV 20) on Day 1.
VV_Lot 2 GroupACTIVE_COMPARATORParticipants receive 1 dose of a marketed VV of Lot 2, 1 dose of MMR vaccine, 1 dose of HAV vaccine, and 1 dose of PCV (either PCV 13 or Vaxneuvance or PCV 20) on Day 1.
Interventions
NameTypeDescription
Investigational varicella vaccine_Lot 1BIOLOGICALInvestigational varicella vaccine of Lot 1 administered subcutaneously.
Investigational varicella vaccine_Lot 2BIOLOGICALInvestigational varicella vaccine of Lot 2 administered subcutaneously.
Investigational varicella vaccine_Lot 3BIOLOGICALInvestigational varicella vaccine of Lot 3 administered subcutaneously.
Marketed varicella vaccine_Lot 1BIOLOGICALMarketed varicella vaccine of Lot 1 administered subcutaneously.
Marketed varicella vaccine_Lot 2BIOLOGICALMarketed varicella vaccine of Lot 2 administered subcutaneously.
MMR vaccineBIOLOGICALMMR vaccine co-administered subcutaneously or intramuscularly.
Hepatitis A vaccineBIOLOGICALHepatitis A vaccine co-administered intramuscularly.
PCV (pneumococcal conjugate vaccine) 13BIOLOGICALThe 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 20BIOLOGICALThe 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.
VaxneuvanceBIOLOGICALThe 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.
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Eligibility Criteria
Age Range12 Months — 15 Months
SexALL
Healthy VolunteersYes
Study Sites97

Inclusion Criteria: * Participant's parent(s) Legally acceptable representatives /(LAR\[s\]), who, in the opinion of the investigator, can and will comply with the requirements of the protocol (e.g., completion of the eDiaries, return for follow-up visits). * Written or witnessed/thumb printed info...

Countries:United StatesBelgiumColombiaCzechiaDominican RepublicEstoniaMexicoPolandPuerto RicoThailandUnited Arab Emirates
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Recent Changes (Last 90 Days)
LOWMay 29, 2026NCT06740630Completion: 2027-05-13 → 2027-05-17
LOWMay 29, 2026NCT06740630Completion: 2027-05-13 → 2027-05-17
LOWMay 29, 2026NCT06740630Completion: 2027-05-13 → 2027-05-17
LOWMay 26, 2026NCT06740630primaryCompletionDate: changed
LOWMay 24, 2026NCT06740630studyFirstPostDate: changed