Safety and Immunogenicity of Three V181 Dengue Vaccine Potencies in Adults (V181-003)

Completed · Phase 2 · Has a placebo group

Conditions studied: Dengue Disease, Dengue Virus

In brief

The primary objective of this study is to compare the dengue virus-neutralizing antibody geometric mean titers (GMTs) for each of the 4 dengue serotypes (DENV1, DENV2, DENV3, and DENV4) at Day 28 post-vaccination for participants administered the V181 Low-Potency Level vaccine versus the V181 Mid-Potency Level vaccine. This study will also evaluate the safety and tolerability of 3 different V181 potency level vaccines. The primary hypothesis of the study is that the V181 Low-Potency Level vaccine is non-inferior to the V181 Mid-Potency Level vaccine for each of the 4 dengue serotypes based on GMTs at Day 28 post-vaccination.

Key facts

Study ID: NCT05507450
Run by: Merck Sharp & Dohme LLC
People needed: 1271
Starts: 2022-09-07
Expected to finish: 2024-05-07
Last updated by the study team: 2025-05-09

Who can join

Age: 18 and older, up to 50. Sex: any. Healthy volunteers: accepted.

You may qualify if…

Male participants are eligible to participate if they agree to the following for at least 90 days after administration of study intervention: Abstain from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis) and agree to remain abstinent; or must agree to use contraception unless confirmed to be azoospermic (vasectomized or secondary to medical cause).
A female participant is eligible to participate if she is not pregnant or breastfeeding, and at least one of the following conditions applies: Is NOT women of child-bearing potential; or is a WOCBP and using a contraceptive method that is highly effective (with a failure rate of <1% per year), or is abstinent from heterosexual intercourse as her preferred and usual lifestyle (abstinent on a long term and persistent basis), for at least 90 days after administration of study intervention. (Contraceptive use by women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.)

You may not qualify if…

Has known history of dengue or zika natural infection.
Has an acute febrile illness (temperature ≥38.0°C [≥100.4°F] oral or equivalent) occurring within 72 hours before receipt of study vaccine or placebo.
Has a serious or progressive disease, including but not limited to cancer; uncontrolled diabetes; severe cardiac, renal, or hepatic insufficiency; or systemic autoimmune or neurologic disorder.
Has known or suspected impairment of immunological function, including but not limited to congenital or acquired immunodeficiency, human immunodeficiency virus (HIV) infection, hematologic malignancy, or treatment for autoimmune diseases.
Has a condition in which repeated venipuncture or injections pose more than minimal risk for the participant, such as hemophilia, thrombocytopenia, other severe coagulation disorders, or significantly impaired venous access.
Has a known hypersensitivity to any component of the study vaccine or placebo, or history of severe allergic reaction (eg, swelling of the mouth and throat, difficulty breathing, hypotension or shock) that required medical intervention.
Has received a dose of any dengue vaccine (investigational or approved) before study entry, or plans to receive any dengue vaccine (investigational or approved) for the duration of the trial.
Has received other licensed non-live vaccines within 14 days before receipt of study vaccine or placebo, or is scheduled to receive any licensed non-live vaccine within 28 days following receipt of study vaccine or placebo. Exception: Inactivated influenza vaccine may be administered but must be given at least 7 days before receipt of study vaccine or placebo, or at least 28 days after receipt of study vaccine or placebo.
Has received a licensed live vaccine within 28 days before receipt of study vaccine or placebo, or is scheduled to receive any live vaccine within 28 days following receipt of study vaccine or placebo.
Has received systemic corticosteroids (equivalent of ≥2 mg/kg/day of prednisone or ≥20 mg/d for persons weighing >10 kg) for ≥14 consecutive days and has not completed treatment at least 30 days before study entry or is expected to receive systemic corticosteroids at aforementioned dose and duration within 28 days following receipt of study vaccine or placebo. (Note: Topical and inhaled/nebulized steroids are permitted.)
Has received systemic corticosteroids exceeding physiologic replacement doses (approximately 5 mg/day prednisone equivalent) within 14 days before vaccination.
Has received immunosuppressive therapies, including chemotherapeutic agents used to treat cancer or other conditions, treatments associated with organ or bone marrow transplantation, or autoimmune disease, within 6 months before receipt of study vaccine or placebo, or plans to receive immunosuppressive therapies within 28 days following receipt of study vaccine or placebo.
Has received a blood transfusion or blood products (including immunoglobulins) within 6 months before receipt of a study vaccine or placebo, or plans to receive a blood transfusion or blood products (including immunoglobulins) within 28 days following receipt of study vaccine or placebo.
Has participated in another clinical study of an investigational product within 6 months before signing the informed consent, or plans to participate in another interventional clinical study at any time during the duration of the current clinical study. Participants enrolled in observational studies may be included; these will be reviewed on a case-by-case basis for approval by the Sponsor.
Has planned donation of blood, eggs, or sperm at any time from signing the informed consent through 90 days post-vaccination.

Where it is running

California Research Foundation ( Site 0114) — San Diego, California, United States
Advanced Medical Research Institute ( Site 0115) — Miami, Florida, United States
Rochester Clinical Research, Inc. ( Site 0122) — Rochester, New York, United States
University of Texas Medical Branch ( Site 0113) — Galveston, Texas, United States
IMA Clinical Research San Antonio ( Site 0111) — San Antonio, Texas, United States
Alliance for Multispecialty Research LLC (AMR - Norfolk) ( Site 0123) — Norfolk, Virginia, United States
Paratus Clinical Research Western Sydney ( Site 0007) — Blacktown, New South Wales, Australia
Emeritus Research ( Site 0010) — Botany, New South Wales, Australia
USC Clinical Trials Moreton Bay ( Site 0001) — Morayfield, Queensland, Australia
USC Clinical Trials Sunshine Coast ( Site 0005) — Sippy Downs, Queensland, Australia
USC Clinical Trials Brisbane (South Bank) ( Site 0006) — South Brisbane, Queensland, Australia
Emeritus Research ( Site 0009) — Camberwell, Victoria, Australia
Diex Recherche Quebec Inc. ( Site 0022) — Québec, Quebec, Canada
Diex Recherche Joliette ( Site 0023) — Saint-Charles-Borromée, Quebec, Canada
Diex Recherche Sherbrooke Inc. ( Site 0024) — Sherbrooke, Quebec, Canada
Diex Recherche Victoriavile Inc. ( Site 0021) — Victoriaville, Quebec, Canada
FVR, Kokkolan rokotetutkimusklinikka ( Site 0037) — Kokkola, Keski-Pohjanmaa, Finland
FVR, Oulun rokotetutkimusklinikka ( Site 0032) — Oulu, North Ostrobothnia, Finland
FVR, Tampereen rokotetutkimusklinikka ( Site 0039) — Tampere, Pirkanmaa, Finland
FVR, Porin rokotetutkimusklinikka ( Site 0033) — Pori, Satakunta, Finland
FVR, Seinäjoen rokotetutkimusklinikka ( Site 0040) — Seinäjoki, South Ostrobothnia, Finland
FVR, Turun rokotetutkimusklinikka ( Site 0031) — Turku, Southwest Finland, Finland
FVR, Espoon rokotetutkimusklinikka ( Site 0036) — Espoo, Uusimaa, Finland
FVR, Etelä-Helsingin rokotetutkimusklinikka ( Site 0038) — Helsinki, Uusimaa, Finland
FVR, Itä-Helsingin rokotetutkimusklinikka ( Site 0035) — Helsinki, Uusimaa, Finland

Full record on ClinicalTrials.gov

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