{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+Vaccine&page=4",
    "query": {
      "intervention": "Placebo Vaccine",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 984,
    "total_pages": 99,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+Vaccine&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+Vaccine&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T18:28:07.703Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT06546709",
      "title": "DMID 23-0015; Lassa Fever CVD 1000",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Lassa Fever"
      ],
      "interventions": [
        {
          "name": "LASSARAB+ aPHAD-SEat 700rU",
          "type": "BIOLOGICAL"
        },
        {
          "name": "HDCV Comparator",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Normal Saline Placebo",
          "type": "OTHER"
        },
        {
          "name": "LASSARAB+ aPHAD-SEat 1400rU",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Wilbur Chen, MD, MS",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 54,
      "start_date": "2025-01-13",
      "completion_date": "2026-05-11",
      "has_results": false,
      "last_update_posted_date": "2026-09-24",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06546709"
    },
    {
      "nct_id": "NCT03579459",
      "title": "Evaluation Of Clostridium Difficile Vaccine Lot Consistency In Healthy Adults 65 To 85 Years Of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clostridium Difficile Associated Disease"
      ],
      "interventions": [
        {
          "name": "Clostridium difficile vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 1317,
      "start_date": "2018-07-31",
      "completion_date": "2019-08-06",
      "has_results": true,
      "last_update_posted_date": "2023-01-19",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 24,
      "location_summary": "Mobile, Alabama • Redding, California • Coral Gables, Florida + 20 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Redding",
          "state": "California"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03579459"
    },
    {
      "nct_id": "NCT07226882",
      "title": "A Study to Learn About Different Dosing Schedules of a Lyme Disease Vaccine in Healthy Adults",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Lyme Borreliosis"
      ],
      "interventions": [
        {
          "name": "VLA15",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "44 Years",
        "sex": "ALL",
        "summary": "18 Years to 44 Years"
      },
      "enrollment_count": 207,
      "start_date": "2025-11-19",
      "completion_date": "2028-01-27",
      "has_results": false,
      "last_update_posted_date": "2026-05-06",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 6,
      "location_summary": "Warren Township, New Jersey • Cortland, New York • Horseheads, New York + 3 more",
      "locations": [
        {
          "city": "Warren Township",
          "state": "New Jersey"
        },
        {
          "city": "Cortland",
          "state": "New York"
        },
        {
          "city": "Horseheads",
          "state": "New York"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Scranton",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07226882"
    },
    {
      "nct_id": "NCT05071313",
      "title": "A Study of an Ad26.RSV.preF-based Vaccine and High-dose Seasonal Influenza Vaccine, With and Without Coadministration, in Adults Aged 65 Years and Older",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza, Human Prevention",
        "Respiratory Syncytial Viruses Prevention"
      ],
      "interventions": [
        {
          "name": "Ad26.RSV.preF-based vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent High-dose Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Janssen Vaccines & Prevention B.V.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 777,
      "start_date": "2021-10-04",
      "completion_date": "2022-10-11",
      "has_results": true,
      "last_update_posted_date": "2025-05-25",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 19,
      "location_summary": "Long Beach, California • Hollywood, Florida • Port Orange, Florida + 14 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Port Orange",
          "state": "Florida"
        },
        {
          "city": "The Villages",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05071313"
    },
    {
      "nct_id": "NCT02134925",
      "title": "Vaccine Therapy in Treating Patients With Newly Diagnosed Advanced Colon Polyps",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Colorectal Adenoma",
        "Colorectal Carcinoma",
        "Colorectal Conventional Adenoma With Severe Dysplasia",
        "Colorectal Tubulovillous Adenoma"
      ],
      "interventions": [
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "MUC1 Peptide-Poly-ICLC Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Saline",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BIOLOGICAL"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "40 Years to 70 Years"
      },
      "enrollment_count": 110,
      "start_date": "2014-06-23",
      "completion_date": "2027-03-09",
      "has_results": true,
      "last_update_posted_date": "2026-09-11",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 6,
      "location_summary": "Boston, Massachusetts • Rochester, Minnesota • Kansas City, Missouri + 2 more",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02134925"
    },
    {
      "nct_id": "NCT01218113",
      "title": "Efficacy and Safety of GSK Biologicals HIV Vaccine in Antiretroviral Therapy (ART)-naïve HIV-1 Infected Persons",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "AIDS"
      ],
      "interventions": [
        {
          "name": "GSK Biologicals HIV Vaccine 732462",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 191,
      "start_date": "2010-11-08",
      "completion_date": "2012-11-05",
      "has_results": true,
      "last_update_posted_date": "2018-05-21",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 17,
      "location_summary": "Bakersfield, California • Long Beach, California • Washington D.C., District of Columbia + 13 more",
      "locations": [
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01218113"
    },
    {
      "nct_id": "NCT00618605",
      "title": "Safety of and Immune Response to an Adenoviral HIV-1 Vaccine in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Ad26.ENVA.01 HIV-1 vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 60,
      "start_date": "2008-02",
      "completion_date": "2015-10",
      "has_results": false,
      "last_update_posted_date": "2021-11-01",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00618605"
    },
    {
      "nct_id": "NCT03423173",
      "title": "Lot-to-lot Consistency of 3 Lots of Tetravalent Dengue Vaccine (TDV) in Non-endemic Country(Ies) for Dengue",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Dengue Fever"
      ],
      "interventions": [
        {
          "name": "TAK-003",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 923,
      "start_date": "2018-02-12",
      "completion_date": "2019-01-14",
      "has_results": true,
      "last_update_posted_date": "2020-10-20",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 14,
      "location_summary": "Huntsville, Alabama • Anaheim, California • Boise, Idaho + 11 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Boise",
          "state": "Idaho"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        },
        {
          "city": "Council Bluffs",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03423173"
    },
    {
      "nct_id": "NCT06097273",
      "title": "A Study of mRNA-1083 (SARS-CoV-2 and Influenza) Vaccine in Healthy Adult Participants, ≥50 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "SARS-CoV-2",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "mRNA-1083",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "COVID-19 Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 8061,
      "start_date": "2023-10-19",
      "completion_date": "2024-05-28",
      "has_results": true,
      "last_update_posted_date": "2025-07-01",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 146,
      "location_summary": "Anniston, Alabama • Birmingham, Alabama • Cullman, Alabama + 122 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Cullman",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06097273"
    },
    {
      "nct_id": "NCT01506570",
      "title": "Evaluating the Safety and Immune Response to Two Admixtures of a Tetravalent Dengue Virus Vaccine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Dengue"
      ],
      "interventions": [
        {
          "name": "TetraVax-DV Vaccine - Admixture TV003",
          "type": "BIOLOGICAL"
        },
        {
          "name": "TetraVax-DV Vaccine - Admixture TV005",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 58,
      "start_date": "2011-12",
      "completion_date": "2013-09",
      "has_results": false,
      "last_update_posted_date": "2015-08-20",
      "last_synced_at": "2026-10-07T18:28:07.703Z",
      "location_count": 3,
      "location_summary": "Baltimore, Maryland • Burlington, Vermont",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Burlington",
          "state": "Vermont"
        },
        {
          "city": "Burlington",
          "state": "Vermont"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01506570"
    }
  ]
}