{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+%28Initial+Vaccination+Period%29",
    "query": {
      "intervention": "Placebo (Initial Vaccination Period)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-26T15:19:37.580Z",
  "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": "NCT05468736",
      "title": "Study to Evaluate Safety and Immunogenicity of COVID-19 Vaccine in Children 6 Months to < 12 Years",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "SARS-CoV-2 rS/Matrix-M1 Adjuvant (Initial Vaccination Period)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "6 Months to 11 Years"
      },
      "enrollment_count": 3600,
      "start_date": "2022-07-22",
      "completion_date": "2025-10-25",
      "has_results": false,
      "last_update_posted_date": "2026-05-22",
      "last_synced_at": "2026-09-26T15:19:37.580Z",
      "location_count": 47,
      "location_summary": "Little Rock, Arkansas • Anaheim, California • Bellflower, California + 41 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Bellflower",
          "state": "California"
        },
        {
          "city": "Fair Oaks",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05468736"
    },
    {
      "nct_id": "NCT04114825",
      "title": "Study of RV001V in Biochemical Failure Following Curatively Intended Therapy For Localized Prostate Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prostate Cancer Recurrent"
      ],
      "interventions": [
        {
          "name": "RV001V",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "RhoVac APS",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 180,
      "start_date": "2019-11-19",
      "completion_date": "2022-11",
      "has_results": false,
      "last_update_posted_date": "2021-09-28",
      "last_synced_at": "2026-09-26T15:19:37.580Z",
      "location_count": 7,
      "location_summary": "Clearwater, Florida • Towson, Maryland • Omaha, Nebraska + 4 more",
      "locations": [
        {
          "city": "Clearwater",
          "state": "Florida"
        },
        {
          "city": "Towson",
          "state": "Maryland"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04114825"
    },
    {
      "nct_id": "NCT02707692",
      "title": "Perturbing of HIV Reservoir With Immune Stimulation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "AIDS",
        "HIV"
      ],
      "interventions": [
        {
          "name": "Fluarix",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pneumovax",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 54,
      "start_date": "2016-08",
      "completion_date": "2022-01",
      "has_results": true,
      "last_update_posted_date": "2022-08-24",
      "last_synced_at": "2026-09-26T15:19:37.580Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02707692"
    },
    {
      "nct_id": "NCT01545375",
      "title": "Evaluation of a Vaccine for Reducing Ear and Lung Infections in Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Infections, Streptococcal"
      ],
      "interventions": [
        {
          "name": "Pneumococcal vaccine GSK2189242A",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Prevnar 13®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "PedvaxHIB®",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Weeks",
        "maximum_age": "12 Weeks",
        "sex": "ALL",
        "summary": "6 Weeks to 12 Weeks"
      },
      "enrollment_count": 1806,
      "start_date": "2012-05-21",
      "completion_date": "2016-07-26",
      "has_results": true,
      "last_update_posted_date": "2019-12-27",
      "last_synced_at": "2026-09-26T15:19:37.580Z",
      "location_count": 5,
      "location_summary": "Chinle, Arizona • Fort Defiance, Arizona • Whiteriver, Arizona + 2 more",
      "locations": [
        {
          "city": "Chinle",
          "state": "Arizona"
        },
        {
          "city": "Fort Defiance",
          "state": "Arizona"
        },
        {
          "city": "Whiteriver",
          "state": "Arizona"
        },
        {
          "city": "Gallup",
          "state": "New Mexico"
        },
        {
          "city": "Shiprock",
          "state": "New Mexico"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01545375"
    },
    {
      "nct_id": "NCT04611802",
      "title": "A Study to Evaluate the Efficacy, Immune Response, and Safety of a COVID-19 Vaccine in Adults ≥ 18 Years With a Pediatric Expansion in Adolescents (12 to<18 Years) at Risk for SARS-CoV-2",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "SARS-CoV Infection",
        "Covid19"
      ],
      "interventions": [
        {
          "name": "SARS-CoV-2 rS/Matrix-M1 Adjuvant (Initial Vaccination Period)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo (Initial Vaccination Period)",
          "type": "OTHER"
        },
        {
          "name": "SARS-CoV-2 rS/Matrix-M1 Adjuvant (Crossover Vaccination period)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo (Crossover Vaccination period)",
          "type": "OTHER"
        },
        {
          "name": "SARS-CoV-2 rS/Matrix-M1 Adjuvant (Booster Vaccination)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "SARS-CoV-2 rS/Matrix-M1 Adjuvant (Second Booster Vaccination)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 33000,
      "start_date": "2020-12-27",
      "completion_date": "2023-12-15",
      "has_results": false,
      "last_update_posted_date": "2023-12-21",
      "last_synced_at": "2026-09-26T15:19:37.580Z",
      "location_count": 144,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Tempe, Arizona + 110 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04611802"
    }
  ]
}