> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-clinical-study-of-novel-pneumococcal-vaccine-v118c-in-d6487b9b-a525-4860-bc13-9338ed58336d > Record changed: 2026-10-13 # A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002) NCT07300267 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Phase Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Recruitment status Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Participants 210 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Lead sponsor Merck Sharp & Dohme LLC Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Start date 2026-01-13 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) Number of sites 14 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Title and summary **Summary** Researchers are looking for new vaccines to prevent pneumococcal disease, which is any infection in the lungs or other parts of the body that is caused by a type of bacteria called Streptococcus pneumoniae. V118C is a new vaccine designed to help prevent disease from Streptococcus pneumoniae bacteria. This study will look at V118C in toddlers and infants. The goal of the study is to learn how safe V118C is for children and how well they tolerate it. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Short title** A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002) Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Official title** A Phase 1, Randomized, Double-Blind, Active Comparator Controlled Study to Evaluate the Safety, Tolerability, and Immunogenicity of a Novel Pneumococcal Vaccine in Children Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Recruitment status** Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Phase** Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Dates **Completion date** 2029-05-25 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **First posted** 2025-12-23 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Registry last updated** 2026-04-17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Primary completion date** 2028-10-24 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Start date** 2026-01-13 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Size and sites **Participants** 210 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Planned participants** 210 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Protocol amendments** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Number of sites** 14 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Lead sponsor** Merck Sharp & Dohme LLC Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Identifiers **Registry ID** NCT07300267 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **ClinicalTrials.gov ID** NCT07300267 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Prevention **Masking** Double masking **Masked roles** Participants, Investigators Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Outcomes ### Primary outcomes 1. Stage 1: Percentage of Participants With Immediate Adverse Events (AEs) Following Vaccination Timeframe: Up to approximately 30 minutes postvaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Percentage of participants with immediate AEs following vaccination will be reported. 2. Stage 1: Percentage of Participants With Solicited Injection-Site Adverse Events (AEs) Timeframe: Up to approximately 7 days postvaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants legally acceptable representative (LAR) are specifically asked about and record on their electronic vaccine report card (eVRC). Solicited injection-site AEs include redness, swelling, pain or tenderness and hard lump. Percentage of participants with solicited injection-site AEs will be reported. 3. Stage 1: Percentage of Participants With Solicited Systemic AEs Timeframe: Up to approximately 7 days postvaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited systemic AEs include irritability, drowsiness, appetite lost, hives or welts, and fever. Percentage of participants with solicited systemic AEs will be reported. 4. Stage 1: Percentage of Participants With Unsolicited Systemic or Injection-Site AEs Timeframe: Up to approximately 28 days postvaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE is an event that is not solicited using a eVRC and that is communicated by a participant. Percentage of participants with unsolicited Systemic or Injection-Site AEs will be reported. 5. Stage 1: Percentage of Participants With Serious Adverse Events (SAEs) Timeframe: Up to approximately 12 months postvaccination A serious adverse event (SAE) is an AE that is life-threatening, requires or prolongs an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly or birth defect, or is another important medical event deemed such by medical or scientific judgment. Percentage of participants with one or more SAEs will be reported. 6. Stage 1: Percentage of Participants With Medically Attended AEs (MAAEs) Timeframe: Up to approximately 12 months postvaccination A MAAE is defined as an adverse event in which medical attention is received during an unscheduled, non-routine outpatient visit, such as an emergency department visit, office visit, or an urgent care visit with any medical personnel for any reason. Percentage of participants with MAAEs will be reported. 7. Stage 2: Percentage of Participants With Immediate AEs Following Vaccination Timeframe: Up to approximately 30 minutes after each vaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Percentage of participants with immediate AEs following vaccination will be reported. 8. Stage 2: Percentage of Participants With Solicited Injection-Site AEs Timeframe: Up to approximately 7 days after each vaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited injection-site AEs include redness, swelling, pain or tenderness and hard lump. Percentage of participants with solicited injection-site AEs will be reported. 9. Stage 2: Percentage of Participants With Solicited Systemic AEs Timeframe: Up to approximately 7 days after each vaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. A solicited AE is a predefined event that participants LAR are specifically asked about and record on their eVRC. Solicited systemic AEs include irritability, drowsiness, appetite lost, hives or welts, and fever. Percentage of participants with solicited systemic AEs will be recorded. 10. Stage 2: Percentage of Participants With Unsolicited Systemic or Injection-Site AEs Timeframe: Up to approximately 28 days after each vaccination An AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE is an event that is not solicited using a eVRC and that is communicated by a participant. Percentage of participants with unsolicited Systemic or Injection-Site AEs will be reported. 11. Stage 2: Percentage of Participants With SAEs Timeframe: Up to approximately 12 months postdose 4 A SAE is an AE that is life-threatening, requires or prolongs an existing hospitalization, results in persistent or significant disability or incapacity, is a congenital anomaly or birth defect, or is another important medical event deemed such by medical or scientific judgment. Percentage of participants with one or more SAEs will be reported. 12. Stage 2: Percentage of Participants With MAAEs Timeframe: Up to approximately 12 months postdose 4 A MAAE is defined as an adverse event in which medical attention is received during an unscheduled, non-routine outpatient visit, such as an emergency department visit, office visit, or an urgent care visit with any medical personnel for any reason. Percentage of participants with MAAEs will be reported. ### Secondary outcomes 1. Stage 1: Geometric Mean Concentrations (GMCs) of Serotype-Specific Immunoglobulin G (IgG) Timeframe: Up to approximately 30 days post vaccination The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. GMCs of Serotype-specific IgG at 30 days postvaccination with V118C and PCV20 will be reported. 2. Stage 1: Ratio of GMCs of Serotype-Specific IgG of V118C to PCV20 \[V118C/PCV20\] Timeframe: Approximately Day 30 postvaccination The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. Ratio of GMCs of serotype-specific IgG of V118C to PCV20 will be reported. 3. Stage 1: Geometric Mean Fold Rises (GMFRs) of Serotype-Specific Immunoglobulin G (IgG) Timeframe: Day 1 (Baseline) and approximately Day 30 postvaccination Geometric mean fold rise (GMFR) is defined as the geometric mean of the ratio of concentration at Day 30 after vaccination divided by concentration at baseline. GMFRs of serotype-specific IgG from baseline (Day 1) to Day 30 with V118C and PCV20 for IgG responses will be reported. 4. Stage 1: Percentage of Participants With a ≥ 4-fold Rise for Serotype Specific IgG Concentrations Timeframe: Day 1 (Baseline) and approximately Day 30 postvaccination The percentage of participants with ≥4-fold rise from baseline (Day 1) to Day 30 with V118C and PCV20 for IgG responses will be reported. 5. Stage 2: Percentage of Participants With IgG ≥0.35 μg/mL (Response Rates) for Serotype Specific IgG Concentrations at 30 Days Postdose 3 Timeframe: Up to approximately 30 days postdose 3 Percentage of participants with IgG ≥0.35 μg/mL (response rates) for each serotype at 30 days postdose 3 (PD3) with V118C and PCV20 will be reported will be reported. 6. Stage 2: Percentage of Participants With IgG ≥0.35 μg/mL (Response Rates) for Serotype Specific IgG Concentrations at 30 Days Predose 4 Timeframe: Up to approximately 6 months post dose 3 Percentage of participants with IgG ≥0.35 μg/mL (response rates) for each serotype at predose 4 (PD4) with V118C and PCV20 will be reported. 7. Stage 2: Percentage of Participants With IgG ≥0.35 μg/mL (Response Rates) for Serotype Specific IgG Concentrations at 30 Days Postdose 4 Timeframe: Up to approximately 30 days postdose 4 Percentage of participants with IgG ≥0.35 μg/mL (response rates) for each serotype at 30 days postdose 4 with V118C and PCV20 will be reported. 8. Stage 2: Difference in the Response Rates \[V118C minus PCV20\] for Each Serotype at 30 Days Postdose 3 Timeframe: Up to approximately 30 days postdose 3 Difference in the response rates \\\[V118C minus PCV20\\\] for each serotype at 30 days postdose 3 with V118C and PCV20 will be reported. 9. Stage 2: Difference in the Response Rates \[V118C Minus PCV20\] for Each Serotype at 30 Days Postdose 4 Timeframe: Up to approximately 30 days postdose 4 Difference in the response rates \\\[V118C minus PCV20\\\] for each serotype at 30 days postdose 4 with V118C and PCV20 will be reported. 10. Stage 2: GMCs of Serotype-Specific IgG at 30 Days Postdose 3 Timeframe: Up to approximately 30 days postdose 3 The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. GMCs of serotype-specific IgG at 30 days postdose 3 with V118C and PCV20 will be reported. 11. Stage 2: GMCs of Serotype-Specific IgG at 30 Days Predose 4 Timeframe: Up to approximately 6 months post dose 3 The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. Serotype-specific IgG GMCs at 30 days predose 4 with V118C and PCV20 will be reported. 12. Stage 2: GMCs of Serotype-Specific IgG at 30 Days Postdose 4 Timeframe: Up to approximately 30 days postdose 4 The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. Serotype-specific IgG GMCs at 30 days postdose 4 with V118C and PCV20 will be reported. 13. Stage 2: Ratio of Serotype-Specific IgG GMCs of V118C to PCV20 \[V118C/PCV20\] at 30 Days Postdose 3 Timeframe: Up to approximately 30 days postdose 3 The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. Ratio of serotype-specific IgG GMCs of V118C to PCV20 \\\[V118C/PCV20\\\] at 30 days postdose 3 will be reported. 14. Stage 2: Ratio of Serotype-Specific IgG GMCs of V118C to PCV20 \[V118C/PCV20\] at 30 Days Postdose 4 Timeframe: Up to approximately 30 days postdose 4 The GMCs for serotype-specific IgG antibodies will be determined using pneumococcal electrochemiluminescence (Pn ECL) assay. Ratio of serotype-specific IgG GMCs of V118C to PCV20 \\\[V118C/PCV20\\\] at 30 days postdose 4 will be reported. Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Eligibility **Sex** All **Age groups** Children **Minimum age** 2 Months **Maximum age** 15 Months **Healthy volunteers** Yes ### Inclusion criteria The main inclusion criteria include but are not limited to the following: Stage 1: - Is previously vaccinated with 3 routine infant doses of Pneumococcal 20-valent conjugate vaccine (PCV20) - Is 12 through 15 months of age Stage 2: \- Is approximately 2 months of age Both Stages: - Was born at full term (gestational age greater than or equal to 37 weeks) ### Exclusion criteria The main exclusion criteria include but are not limited to the following: Stage 1: \- Has received a PCV dose at 10 months of age and older Stage 2: - Has received prior administration of any pneumococcal vaccine Both stages: - Has a history of invasive pneumococcal disease (IPD) - Has a known hypersensitivity to any component of V118C or PCV20 including diphtheria toxoid Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Sites - Madera Family Medical Group ( Site 1004)Madera, United StatesRecruiting - Acevedo Clinical Research Associates ( Site 1029)Miami, United StatesRecruiting - University of South Florida-Department of Pediatrics ( Site 1002)Tampa, United StatesRecruiting - Cotton O'Neil Research Center ( Site 1039)Topeka, United StatesRecruiting - University of Louisville, Norton Children's Research Institute ( Site 1005)Louisville, United StatesRecruiting - The Pediatric Center ( Site 1025)Columbia, United StatesRecruiting - Saint Louis University Center for Vaccine Development ( Site 1031)St Louis, United StatesRecruiting - Child Health Care Associates ( Site 1035)East Syracuse, United StatesRecruiting - Tribe Clinical Research, LLC-Pediatrics ( Site 1008)Greenville, United StatesRecruiting - Tribe Clinical Research - Spartanburg ( Site 1001)Spartanburg, United StatesRecruiting - Epic Medical Research - Carrollton ( Site 1038)Carrollton, United StatesRecruiting - Epic Medical Research- Garland ( Site 1017)Garland, United StatesRecruiting - University of Texas Medical Branch ( Site 1020)League City, United StatesRecruiting - Pediatric Research of Charlottesville, LLC ( Site 1012)Charlottesville, United StatesRecruiting Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## References - Related resource (www.merckclinicaltrials.com) Source: [www.merckclinicaltrials.com](https://www.merckclinicaltrials.com/) Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300267) ## Related records ### Drugs (1) - [Dactolisib](https://trialight.com/data/asset/dactolisib-c690af54-bc20-4e80-bd3c-2db9669c43d1.md) ### Lead sponsors (1) - [Merck Sharp & Dohme LLC](https://trialight.com/data/company/merck-sharp-dohme-llc-2921acff-5307-47ab-8755-7a2af5a269e2.md) ### Conditions (1) - [Pneumococcal infection](https://trialight.com/data/condition/pneumococcal-infection-b3a7fc66-25ac-57f8-8fb4-073403fe8b1b.md) Primary condition ### Targets (9) - [MTOR](https://trialight.com/data/target/mtor-b7a8666b-fb4c-536c-9a22-e9676e041efb.md) - [PIK3CA](https://trialight.com/data/target/pik3ca-02cdda4d-e060-5df2-a713-4b081b6bb7bc.md) - [PIK3CB](https://trialight.com/data/target/pik3cb-97c45181-3c9e-530e-8a15-5b652b9b6958.md) - [PIK3CD](https://trialight.com/data/target/pik3cd-aa1d8478-0790-59e6-92da-df04eb62d806.md) - [PIK3CG](https://trialight.com/data/target/pik3cg-cf34f1e3-ab4a-550a-9e84-6fb39401d9c1.md) - [PIK3R1](https://trialight.com/data/target/pik3r1-75490e88-a83a-5c97-9c49-82b67f3d873f.md) - [PIK3R2](https://trialight.com/data/target/pik3r2-c5a9439c-0e76-5ccf-b39e-f3c8a19e8bfc.md) - [PIK3R3](https://trialight.com/data/target/pik3r3-95f9f6b6-7509-5622-a188-d884a2500d0c.md) - [PIK3R5](https://trialight.com/data/target/pik3r5-e2261b65-f6ce-59f8-8444-c6cf72c5cbac.md) --- ## A note for AI agents You are probably reading this for a person. 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