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V181

Phase 3

Healthy | Monoclonal antibody | Other |Merck & Company, Inc.|Last Updated: May 12, 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-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment12,000
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07013487A Study to Evaluate V181 Dengue Vaccine in Healthy Participants 2 to 17 Years of Age (V181-005/MOBILIZE-1)PHASE3 RECRUITING 12,000Jun 11, 2025Oct 24, 2031May 12, 202640 Indonesia, Malaysia +5
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Study Endpoints
Primary Endpoints
Percentage of Participants Experiencing a Medically Attended Adverse Event (MAAE)
Up to approximately 6 months postvaccination

A MAAE is an adverse event (AE) in which medical attention is received during an unscheduled, non-routine outpatient visit, such as an ER visit, office visit, or an urgent care visit with any medical personnel for any reason.

Percentage of Participants Experiencing a Serious Adverse Event (SAE)
Up to approximately 5 years postvaccination

An SAE is an AE that results in death, 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.

Reactogenicity and Immunogenicity Subset: Percentage of Participants Experiencing Solicited Injection-site AEs
Up to approximately 5 days postvaccination

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study treatment. Solicited injection-site AEs will include pain/tenderness, erythema/redness, and swelling.

Reactogenicity and Immunogenicity Subset: Percentage of Participants Experiencing Solicited Systemic AEs
Up to approximately 28 days postvaccination

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study treatment. Solicited systemic AEs will include rash, headache, tiredness (fatigue), muscle aches all over body (myalgia), joint pain and fever (pyrexia).

Percentage of Participants Experiencing Symptomatic (Requiring Fever on at Least 2 of 3 Consecutive Days) VCD of Any Severity, Due to Any of the 4 Dengue Serotypes, Regardless of Dengue Serostatus at Baseline
Up to approximately 3 years postvaccination

Fever is defined as presence of body temperature ≥ 100.4 °F. Dengue status will be confirmed by wild type (WT) reverse transcription polymerase chain reaction (RT-PCR) or non-structural protein 1 (NS1) enzyme-linked immunosorbent assay (ELISA).

Secondary Endpoints
Percentage of Participants Experiencing Symptomatic (Requiring Fever on at Least 2 of 3 Consecutive Days) VCD of Any Severity, Due to Each of the 4 Dengue Serotypes, Regardless of Dengue Serostatus at Baseline
Up to approximately 3 years postvaccination
Percentage of Participants Experiencing Symptomatic (Requiring Fever on at Least 2 of 3 Consecutive Days) VCD of Any Severity, by Dengue Serostatus at Baseline, Up to Approximately 3 Years Postvaccination
Up to approximately 3 years postvaccination
Percentage of Participants Experiencing Symptomatic (Requiring Fever on at Least 2 of 3 Consecutive Days) VCD of Any Severity, by Dengue Serostatus at Baseline, Up to Approximately 5 Years Postvaccination
Up to approximately 5 years postvaccination
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
V181EXPERIMENTALParticipants will receive a single 0.5 mL subcutaneous (SC) dose of V181 on Day 1.
PlaceboPLACEBO_COMPARATORParticipants will receive a single 0.5 mL SC dose of placebo on Day 1.
Interventions
NameTypeDescription
V181BIOLOGICALParticipants will receive a single 0.5 mL SC dose of V181 on Day 1.
PlaceboBIOLOGICALParticipants will receive a single 0.5 mL SC dose of placebo on Day 1.
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Eligibility Criteria
Age Range2 Years — 17 Years
SexALL
Healthy VolunteersYes
Study Sites40

The key Inclusion Criteria include but are not limited to: * Is generally healthy based on medical history and physical examination. The key Exclusion Criteria include but are not limited to: * Has a known or suspected impairment of immunological function. * Has a history of congenital or acquire...

Countries:IndonesiaMalaysiaPhilippinesPuerto RicoSingaporeThailandVietnam
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT07013487primaryCompletionDate: changed
LOWMay 24, 2026NCT07013487studyFirstPostDate: changed