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GARDASIL9

Phase 1

Healthy | Monoclonal antibody | Other |Merck & Company, Inc.|Last Updated: Sep 2, 2026

Target and mechanism

ModalityMonoclonal antibody

Also known as GARDASIL®9, GARDASIL®9 (G9), Gardasil

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment72

FDA Designations

No designations recorded

Clinical trial landscape

GARDASIL9 · 1 trial · 1 indication

Phase 1 1
NCT06623409Safety and Immunogenicity of V540B in Healthy Adults (V540B-002).Healthy
RECRUITING72 Analytics
PHASE1RECRUITING
Safety and Immunogenicity of V540B in Healthy Adults (V540B-002).
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Study Endpoints

Primary Endpoints

Number of Participants Who Experience a Solicited Injection-Site Adverse Event (AE)
Up to approximately 6 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.

Number of Participants Who Experience a Solicited Systemic AE
Up to approximately 6 months

Solicited systemic AEs include headache, fatigue, nausea, dizziness, muscle aches, joint pain.

Immediate Reactions Occurring Within 30 Minutes After Any Vaccination
Up to approximately 6 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.

Number of Participants Who Experienced Unsolicited AEs
Up to approximately 7 months

An unsolicited AE is an AE that was not solicited using a vaccine report card (VRC) and that is communicated by a participant (or their legally acceptable representative, if applicable). Unsolicited AEs include serious and nonserious AEs.

Number of Participants Who Experienced a Serious Adverse Event
Up to approximately 18 months

Serious adverse events (SAEs) include adverse events that result in any of the following outcomes: death, a life-threatening adverse event, inpatient hospitalization or prolongation of existing hospitalization, a persistent or significant incapacity or substantial disruption of the ability to conduct normal functions, or a congenital anomaly/birth defect.

Number of Participants Who Experienced a Medically-Attended AE
Up to approximately 18 months

AEs 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. Routine visits are not considered medically-attended adverse events (MAAEs). Examples of routine visits include physical examination, wellness visits, or vaccinations.

Number of Participants Who Experienced an Event of Clinical Interest
Up to approximately 18 months

Events of clinical interest (ECIs) are defined as an overdose of Sponsor's product, drug-induced liver injury events, or potential immune-mediated diseases (pIMDs).

Secondary Endpoints

Total Immunoglobulin G (IgG) Geometric Mean Ratios (GMRs) for anti-HPV types 6, 11, 16, 18, 31, 33, 45, 52, and 58
Up to approximately 7 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
GARDASIL®9 (G9)ACTIVE_COMPARATORParticipants will receive vaccinations with G9.
V540BEXPERIMENTALParticipants will receive vaccinations with V540B.

Interventions

NameTypeDescription
GARDASIL®9 (G9)BIOLOGICALSuspension administered via intramuscular (IM) injection
V540BBIOLOGICALExperimental vaccine and adjuvant administered via IM injection
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Eligibility Criteria

Age Range18 Years to 45 Years
SexALL
Healthy VolunteersYes
Study Sites5

Inclusion Criteria: The key inclusion criteria include but are not limited to the following: * Is in good health based on medical history, physical examination, vital sign (VS) measurements and electrocardiograms (ECGs) performed before randomization. Exclusion Criteria: The key exclusion criter...

Countries:United States
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Recent Changes (Last 90 Days)

LOWSep 2, 2026NCT06623409Status: ACTIVE_NOT_RECRUITING → RECRUITING
LOWSep 2, 2026NCT06623409Status: ACTIVE_NOT_RECRUITING → RECRUITING
LOWSep 2, 2026NCT06623409Status: ACTIVE_NOT_RECRUITING → RECRUITING
MEDIUMSep 1, 2026NCT06623409primaryCompletionDate: changed
MEDIUMSep 1, 2026NCT06623409primaryCompletionDate: changed

Frequently asked questions about GARDASIL9

What is GARDASIL used for?

GARDASIL is a vaccine used to prevent human papillomavirus (HPV) infections and related conditions, including cervical cancer, vulvar cancer, vaginal cancer, and genital warts. It is also studied in healthy individuals for safety and immunogenicity. The vaccine is developed by Merck & Company, Inc. and is in Phase 3 clinical development.

What does GARDASIL target?

GARDASIL is a vaccine that targets human papillomavirus (HPV) types to prevent infections and associated cancers. It is designed to elicit an immune response against HPV, thereby reducing the risk of cervical cancer, vulvar cancer, vaginal cancer, and genital warts. The vaccine is being studied in clinical trials for its efficacy and safety.

Who makes GARDASIL?

GARDASIL is developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The vaccine is being studied in clinical trials for the prevention of HPV infections and related cancers.

What phase is GARDASIL in?

GARDASIL is in Phase 3 clinical development. It is being studied in a Phase 3 trial (NCT00157950) for papillomavirus infections and a Phase 3 trial (NCT00543543) for cervical cancer and other HPV-related conditions. The vaccine is investigational and not yet approved.

What clinical trials is GARDASIL in?

GARDASIL is being studied in several clinical trials, including NCT00157950 (Phase 3, completed) for papillomavirus infections, NCT00260039 (Phase 2, completed) for HPV and cervical cancer, NCT00543543 (Phase 3, completed) for cervical cancer and genital warts, and NCT06623409 (Phase 1, active) for safety in healthy adults.

Is GARDASIL the same as GARDASIL 9?

GARDASIL is also known as GARDASIL 9, GARDASIL9, and GARDASIL 9 (G9). These names refer to the same vaccine product developed by Merck & Company, Inc. for the prevention of HPV infections and related cancers.