{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+influenza+virus+vaccine",
    "query": {
      "intervention": "Seasonal influenza virus vaccine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 159,
    "total_pages": 16,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+influenza+virus+vaccine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T00:59:36.731Z",
  "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": "NCT03346772",
      "title": "Study of Immune Responses to Influenza Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza Vaccination"
      ],
      "interventions": [
        {
          "name": "Influenza vaccination",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2017-10-20",
      "completion_date": "2026-07-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-27",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03346772"
    },
    {
      "nct_id": "NCT01685372",
      "title": "Immunogenicity of Fluzone High Dose in Immunocompromised Children and Young Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Solid Organ Transplant Recipient (Liver, Kidney, Heart)",
        "Rheumatologic Disorder",
        "Human Immunodeficiency Virus (HIV)",
        "Bone Marrow Transplant (BMT)",
        "Dialysis"
      ],
      "interventions": [
        {
          "name": "Fluzone High Dose",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "5 Years to 35 Years"
      },
      "enrollment_count": 16,
      "start_date": "2012-09",
      "completion_date": "2017-09",
      "has_results": true,
      "last_update_posted_date": "2018-01-23",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01685372"
    },
    {
      "nct_id": "NCT02233816",
      "title": "Immunogenicity, Safety and Tolerability of a Plant-Derived Seasonal Virus-Like-Particle Quadrivalent Influenza Vaccine in Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Virus Diseases",
        "RNA Virus Infections",
        "Respiratory Tract Diseases",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "Low dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Medium dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "High dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Medicago",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 300,
      "start_date": "2014-07-28",
      "completion_date": "2015-06-22",
      "has_results": false,
      "last_update_posted_date": "2019-11-13",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 2,
      "location_summary": "Hollywood, Florida • Miami, Florida",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02233816"
    },
    {
      "nct_id": "NCT01991587",
      "title": "Safety, Tolerability and Immunogenicity of a Plant-made Seasonal Quadrivalent VLP Influenza Vaccine in Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Virus Diseases",
        "RNA Virus Infections",
        "Respiratory Tract Diseases",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "Low dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Medium dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "High dose of quadrivalent VLP vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Medicago",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 120,
      "start_date": "2013-10-08",
      "completion_date": "2014-06-30",
      "has_results": false,
      "last_update_posted_date": "2020-06-11",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01991587"
    },
    {
      "nct_id": "NCT06431607",
      "title": "A Study to Find the Dose and Assess the Immune Response and Safety of a Vaccine Against Influenza in Healthy Younger and Older Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "F2G22B/DL001Z",
          "type": "BIOLOGICAL"
        },
        {
          "name": "F2H23D/DL001Z-NH",
          "type": "BIOLOGICAL"
        },
        {
          "name": "F2H23B/DL001Z-NH",
          "type": "BIOLOGICAL"
        },
        {
          "name": "F2H23H/DL001Z",
          "type": "BIOLOGICAL"
        },
        {
          "name": "FDQ23A-NH (Flu D-QIV)",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "GSK5800544A",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flu D-TIV",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "F2H23A/DL001Z-NH",
          "type": "BIOLOGICAL"
        },
        {
          "name": "F2H23G/DL001Z",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone HD Quadrivalent",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Fluzone HD",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 845,
      "start_date": "2024-05-23",
      "completion_date": "2025-06-04",
      "has_results": true,
      "last_update_posted_date": "2026-03-10",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 18,
      "location_summary": "Hialeah, Florida • Miami, Florida • Chicago, Illinois + 14 more",
      "locations": [
        {
          "city": "Hialeah",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Valparaiso",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06431607"
    },
    {
      "nct_id": "NCT00903552",
      "title": "Trial to Evaluate Safety and Immunogenicity of Trivalent Seasonal Influenza Virus-Like Particle (VLP) Vaccine (Recombinant)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Seasonal Influenza"
      ],
      "interventions": [
        {
          "name": "Influenza VLP Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 221,
      "start_date": "2009-05",
      "completion_date": "2009-10",
      "has_results": false,
      "last_update_posted_date": "2013-07-18",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 2,
      "location_summary": "Pembroke Pines, Florida • Baltimore, Maryland",
      "locations": [
        {
          "city": "Pembroke Pines",
          "state": "Florida"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00903552"
    },
    {
      "nct_id": "NCT00858611",
      "title": "VRC 307: A Double-Blind, Randomized Phase I Study of the Safety and Immunogenicity of a Prime-Boost Schedule of the Investigational DNA Trivalent Influenza Vaccine, VRC-FLUDNA047-00-VP, Followed by the 2008/2009 Seasonal Influenza Trivalent Inactivat...",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "VRC-FLUDNA047-00-VP",
          "type": "DRUG"
        },
        {
          "name": "Flulaval (Registered) Seasonal Influenza Vaccine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 51,
      "start_date": "2009-03-03",
      "completion_date": "2010-06-21",
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00858611"
    },
    {
      "nct_id": "NCT04499534",
      "title": "BRCA1/2 Flu Vaccine",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "BRCA1 Mutation",
        "BRCA2 Mutation"
      ],
      "interventions": [
        {
          "name": "Seasonal influenza vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Abramson Cancer Center at Penn Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "25 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2019-10-28",
      "completion_date": "2027-06",
      "has_results": false,
      "last_update_posted_date": "2026-07-08",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04499534"
    },
    {
      "nct_id": "NCT05827926",
      "title": "A Study of mRNA-based Influenza and SARS-CoV-2 (COVID-19) Multi-component Vaccines in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "SARS-CoV-2",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Influenza Vaccine 1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1083.1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1083.2",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1083.3",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Investigational Influenza Vaccine 1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Investigational COVID-19 Vaccine 1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "COVID-19 Vaccine 1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Investigational Influenza Vaccine 2",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Influenza Vaccine 2",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1083",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Investigational COVID-19 Vaccine 2",
          "type": "BIOLOGICAL"
        },
        {
          "name": "COVID-19 Vaccine 2",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "18 Years to 79 Years"
      },
      "enrollment_count": 1758,
      "start_date": "2023-04-14",
      "completion_date": "2024-12-03",
      "has_results": true,
      "last_update_posted_date": "2025-12-23",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 69,
      "location_summary": "Chandler, Arizona • Colton, California • Huntington Beach, California + 59 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Colton",
          "state": "California"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Modesto",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05827926"
    },
    {
      "nct_id": "NCT00987350",
      "title": "Safety Study of Seasonal Influenza Vaccine by Jet Injection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Healthy Adults"
      ],
      "interventions": [
        {
          "name": "LectraJet",
          "type": "DEVICE"
        },
        {
          "name": "TIV by jet injection",
          "type": "DEVICE"
        },
        {
          "name": "Seasonal Trivalent Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BIOLOGICAL"
      ],
      "sponsor": "University of Maryland, Baltimore",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 60,
      "start_date": "2010-01",
      "completion_date": "2010-05",
      "has_results": false,
      "last_update_posted_date": "2021-05-03",
      "last_synced_at": "2026-10-07T00:59:36.731Z",
      "location_count": 1,
      "location_summary": "College Park, Maryland",
      "locations": [
        {
          "city": "College Park",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00987350"
    }
  ]
}