> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-study-on-the-immune-response-and-safety-of-an-a4bde0bf-426f-44fd-8f34-15d639cc2197 > Record changed: 2026-10-13 # A Study on the Immune Response and Safety of an Investigational Combined Measles, Mumps, Rubella and Varicella Vaccine, When Administered as Intramuscular Injection to Healthy Children 15 Months to 6 Years of Age NCT07406360 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Phase Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Recruitment status Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Participants 1,209 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Lead sponsor GlaxoSmithKline Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Start date 2026-05-11 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) Number of sites 17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Title and summary **Summary** This study is evaluating the immunogenicity and safety of intramuscular administration of the investigational MMRVNS vaccine compared to intramuscular administration of the MMRV (Merck's measles, mumps, rubella and varicella) vaccine (ProQuad) that is already licensed for this route, when administered as a second dose in children 15 months to 6 years of age who were previously primed with a first dose of any combination of measles, mumps, rubella and varicella-containing vaccine(s). Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Short title** A Study on the Immune Response and Safety of an Investigational Combined Measles, Mumps, Rubella and Varicella Vaccine, When Administered as Intramuscular Injection to Healthy Children 15 Months to 6 Years of Age Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Official title** A Phase 3a, Observer Blind, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Combined Measles, Mumps, Rubella, and Varicella Vaccine Compared With Intramuscular Administration of ProQuad When Administered as a Second Dose to Healthy Children Aged 15 Months to 6 Years of Age Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Recruitment status** Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Phase** Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Dates **Completion date** 2028-07-20 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **First posted** 2026-02-12 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Registry last updated** 2026-07-08 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Primary completion date** 2028-02-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Start date** 2026-05-11 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Size and sites **Participants** 1,209 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Planned participants** 1,209 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Protocol amendments** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Number of sites** 17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Lead sponsor** GlaxoSmithKline Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Identifiers **Registry ID** NCT07406360 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **ClinicalTrials.gov ID** NCT07406360 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Prevention **Masking** Quadruple masking **Masking description** Study is observer-blind, participants care providers investigators and outcomes assessors are blinded but Investigational Medicinal Product administrators are unblinded. **Masked roles** Participants, Care providers, Investigators, Outcome assessors Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Outcomes ### Primary outcomes 1. Seroresponse of Immunoglobulin G (IgG) concentrations against measles Timeframe: At Day 43 2. Seroresponse of IgG concentrations against mumps Timeframe: At Day 43 3. Seroresponse of IgG concentrations against rubella Timeframe: At Day 43 4. Seroresponse of IgG concentrations against Varicella zoster virus (VZV) Timeframe: At Day 43 5. IgG concentrations against measles Timeframe: At Day 43 6. IgG concentrations against mumps Timeframe: At Day 43 7. IgG concentrations against rubella Timeframe: At Day 43 8. IgG concentrations against VZV Timeframe: At Day 43 ### Secondary outcomes 1. Number of participants with any solicited administration site events Timeframe: From Day 1 to Day 4 for injection site redness, pain/tenderness and swelling; and from Day 1 to Day 43 for injection site varicella-like rash Solicited administration site events are injection site redness, pain/tenderness, swelling, and injection site varicella-like rash. 2. Number of participants with any solicited systemic events Timeframe: From Day 1 to Day 15 for somnolence and loss of appetite; Day 1 to Day 22 for fever; and Day 1 to Day 43 for varicella-like rash, measles/rubella-like rash and other rash Solicited systemic events are somnolence (sleepiness/drowsiness), loss of appetite, fever, non-injection site varicella-like rash, measles/rubella-like rash and other rash. 3. Number of participants with any unsolicited adverse events (AEs) Timeframe: From Day 1 up to Day 43 (during the 43 days following study intervention administration) 4. Number of participants with any medically attended adverse events (MAAEs) Timeframe: From Day 1 up to Day 181 (during the 181 days following study intervention administration) 5. Number of participants with any serious AEs (SAEs), fatal SAEs, related SAEs Timeframe: From Day 1 up to study end (Day 181) Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Eligibility **Sex** All **Age groups** Children **Minimum age** 15 Months **Maximum age** 6 Years **Healthy volunteers** Yes ### Inclusion criteria - Participants' 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 participants parent(s)/LAR(s) prior to performance of any study specific procedure. - Informed assent obtained from the participants in line with local rules and regulations. - Healthy participants as established by medical history and clinical examination at screening. For countries where the second dose of measles, mumps, rubella, and varicella vaccination is administered between 4 and 6 years of age: - A male or female participant between and including 4 and 6 years of age at the time of the study intervention administration, and in accordance with local regulations. - Participant who previously received a first dose of varicella-containing vaccine in the second year of life. - Participant who previously received a first dose of measles, mumps, rubella-containing vaccine in the second year of life. For other countries: - A male or female participant between and including 15 months to 6 years of age at the time of study intervention administration, and in accordance with local regulations. - Participant who previously received a first dose of varicella-containing vaccine in the second year of life, or earlier at 11 months of age in accordance with national vaccination schedule following official recommendation, at least 3 months before study entry. - Participant who previously received a first dose of measles, mumps, rubella-containing vaccine in the second year of life, or earlier at 11 months of age in accordance with national vaccination schedule following official recommendation, at least 1 month before study entry. ### Exclusion criteria Medical conditions - History of any reaction or hypersensitivity likely to be exacerbated by any component of the study interventions, including hypersensitivity to neomycin or, gelatin. - Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination. - Hypersensitivity to latex. - Unstable chronic conditions as determined by medical history and physical examination. - Major congenital defects, as assessed by the investigator. - History of measles, mumps, rubella, or varicella/zoster disease, as evaluated by the investigator. - Recurrent history or uncontrolled neurological disorders or any neuroinflammatory, congenital neurological conditions, encephalopathies, or seizures. - History of febrile seizures, for participant under 4 years of age. - Active untreated tuberculosis. - Condition that, in the judgement of the investigator, would make intramuscular injection unsafe. - Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the participant due to participation in the clinical study. Prior/Concomitant therapy - Use of any investigational or non-registered product other than the study interventions during the period beginning 30 days before the dose of study intervention, or their planned use during the study period. - Administration of immunoglobulins or other blood products or plasma derivates during the period starting 90 days before the study intervention or planned administration during the study period. - 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 interventions administration: systemic corticosteroid. - Up to 180 days prior to study intervention administration: long-acting immune-modifying drugs including among others immunotherapy, monoclonal antibodies, antitumoral medication. - Previous vaccination with a second dose of varicella containing vaccine or measles, mumps, rubella-containing vaccine. - Use of salicylates or salicylate-containing products or its planned use during the period of 6 weeks following study intervention administration. - Planned administration/administration of a vaccine not foreseen by the study protocol in the period starting 30 days before the dose and ending 43 days after the dose of study intervention administration, 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 intervention, and - Diphtheria, tetanus, acellular pertussis-containing vaccines may be administrated according to the local immunization practices of each participating country. It has to be administered on the same day as the study intervention administration at a different location. However, other than protocol-specified DTaP brand and diphtheria, tetanus, whole cell pertussis-containing vaccines are not allowed. If emergency mass vaccination for an unforeseen public health threat is recommended and/or organized by public health authorities outside the routine immunization program, the time period described above can be reduced provided it is used according to the local governmental recommendations and sponsor is notified. Prior/Concurrent clinical study participation • Concurrently participating in another clinical study, at any time during the study period, Other exclusion criteria - Any study personnel's immediate dependents, family, or household members. - Child in care. - Participants with the following high-risk individuals in their household: - Immunocompromised individuals. - Pregnant women without documented history of varicella. - Newborn infants of mothers without documented history of varicella. - Newborn infants born <28 weeks of gestation. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Sites - GSK Investigational SiteBirmingham, United StatesRecruiting - GSK Investigational SiteWalnut Creek, United StatesRecruiting - GSK Investigational SiteMiami, United StatesRecruiting - GSK Investigational SiteMiami, United StatesRecruiting - GSK Investigational SiteAtlanta, United StatesRecruiting - GSK Investigational SiteChicago, United StatesRecruiting - GSK Investigational SiteFarmington Hills, United StatesRecruiting - GSK Investigational SiteDayton, United StatesRecruiting - GSK Investigational SiteSimpsonville, United StatesRecruiting - GSK Investigational SiteSpartanburg, United StatesRecruiting - GSK Investigational SiteFrisco, United StatesRecruiting - GSK Investigational SiteHouston, United StatesRecruiting - GSK Investigational SiteHouston, United StatesRecruiting - GSK Investigational SitePort Lavaca, United StatesRecruiting - GSK Investigational SiteRichmond, United StatesRecruiting - GSK Investigational SiteProvo, United StatesRecruiting - GSK Investigational SiteRichmond, United StatesRecruiting Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## References ### Other registry identifiers (2) - 2025 - 2025-523274-17-00 Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07406360) ## Related records ### Drugs (1) - [Adenosine phosphate](https://trialight.com/data/asset/adenosine-phosphate-4407e198-7205-4ce3-890f-2eafe894e8e4.md) ### Lead sponsors (1) - [GlaxoSmithKline](https://trialight.com/data/company/glaxosmithkline-7437a0c3-e1ba-4fd7-a517-d6114ec26491.md) ### Conditions (4) - [Chickenpox](https://trialight.com/data/condition/chickenpox-4213f806-c779-5b01-9e52-7179e9edebeb.md) - [Measles](https://trialight.com/data/condition/measles-e911b368-d3a1-5195-beb8-c6e9d3368cb4.md) Primary condition - [Mumps infectious disease](https://trialight.com/data/condition/mumps-infectious-disease-d8b1959a-ac1b-5cef-aac4-03934e0bc8fa.md) - [Rubella](https://trialight.com/data/condition/rubella-c0965442-b42f-5d5d-a1ad-8daacf67da1a.md) --- ## A note for AI agents You are probably reading this for a person. 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