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V540A-2

Phase 2

Healthy | Monoclonal antibody | Other |Merck & Company, Inc.|Last Updated: Feb 19, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment525

FDA Designations

No designations recorded

Clinical trial landscape

V540A-2 · 1 trial · 1 indication

Phase 2 1
NCT07224477A Clinical Study of V540A in Healthy Female Participants (V540A-005)Healthy
NOT YET_RECRUITING525 Analytics
PHASE2NOT YET_RECRUITING
A Clinical Study of V540A in Healthy Female Participants (V540A-005)
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants Who Experience ≥1 Solicited Injection-site Adverse Event (AE)
Up to approximately 7 months

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 intervention. Solicited injection-site AEs include redness (erythema), swelling (swelling), and pain or tenderness (pain). The number of participants who experienced at least 1 solicited injection-site AE from Day 1 through Day 5 post each vaccination will be reported.

Number of Participants Who Experience ≥1 Solicited Pyrexia AE
Up to approximately 7 months

Pyrexia is defined as a temperature(s) ≥100.4°F (≥38.0°C). The number of participants with solicited pyrexia from Day 1 through Day 5 post each vaccination will be reported.

Number of Participants Who Experience ≥1 Vaccine-related Serious AE (SAE)
Up to approximately 7 months

A vaccine-related SAE is any untoward medical consequence that results in death, is life-threatening, requires inpatient hospitalization or prolongs existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or is another important medical event which is determined by the investigator to be related to the vaccine. The number of participants who experienced at least 1 vaccine-related SAE will be reported.

Geometric Mean Titers (GMTs) to Each of the Shared Human Papillomavirus (HPV) Vaccine Types at Day 29 Postdose 3
Up to approximately 7 months

Antibodies to HPV types shared between V540A and GARDASIL®9 will be measured. Geometric mean titers of antibodies to HPV types at Day 29 postdose 3 will be reported.

Secondary Endpoints

GMTs of Each of the Shared and Unique HPV Vaccine Types at Day 29 Postdose 1
Up to 29 days
GMTs of Each of the Shared and Unique HPV Vaccine Types at Day 29 Postdose 2
Up to approximately 3 months
GMTs to Each of the Shared and Unique HPV Vaccine Types at Day 29 Postdose 3
Up to approximately 7 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
V540A-2EXPERIMENTALParticipants will receive vaccinations of V540A-2.
V540A-3EXPERIMENTALParticipants will receive vaccinations of V540A-3.
GARDASIL®9ACTIVE_COMPARATORParticipants will receive vaccinations of V503.

Interventions

NameTypeDescription
V540A-2BIOLOGICALSuspension administered via intramuscular (IM) injection.
V540A-3BIOLOGICALSuspension administered via intramuscular (IM) injection.
GARDASIL®9BIOLOGICALSuspension administered via IM injection.
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Eligibility Criteria

Age Range16 Years to 26 Years
SexFEMALE
Healthy VolunteersYes

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Is in good health * Has a lifetime history of 0 to 4 sexual partners of any sex/gender * A participant assigned female sex at birth is eligible to participate if not breastfeeding during the study inter...

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Frequently asked questions about V540A-2

What is V540A-2 used for?

V540A-2 is a monoclonal antibody being studied in healthy female participants. It is currently in Phase 2 clinical development as an investigational therapy. The drug is being evaluated in a clinical trial that enrolls healthy volunteers to assess its safety and effects.

Who makes V540A-2?

V540A-2 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. Merck is conducting clinical research on this monoclonal antibody in healthy female participants.

What phase is V540A-2 in?

V540A-2 is in Phase 2 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 2 study is designed to evaluate the drug in healthy female participants.

What clinical trials is V540A-2 in?

V540A-2 is being studied in a Phase 2 clinical trial with the identifier NCT07224477. This trial, titled "A Clinical Study of V540A in Healthy Female Participants (V540A-005)," is a randomized, double-blind, active-controlled study that plans to enroll 525 healthy female participants aged 16 years and older.

Is V540A-2 the same as V540A?

V540A-2 is a variant of the investigational monoclonal antibody V540A. The clinical trial NCT07224477 is titled "A Clinical Study of V540A in Healthy Female Participants," indicating that V540A-2 is related to the V540A program being developed by Merck & Company, Inc.