{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fluzone+HD+Quadrivalent",
    "query": {
      "intervention": "Fluzone HD Quadrivalent"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 78,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fluzone+HD+Quadrivalent&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T21:54:59.848Z",
  "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": "NCT02258334",
      "title": "Study of Fluzone® Quadrivalent, Fluzone® Intradermal, and Fluzone® High-Dose, Influenza Vaccines in Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Fluzone® Quadrivalent vaccine, 2014-2015 formulation",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone I®ntradermal vaccine, 2014-2015 formulation",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone High Dose vaccine, 2014-2015 formulation",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 208,
      "start_date": "2014-10",
      "completion_date": "2014-12",
      "has_results": true,
      "last_update_posted_date": "2015-10-19",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 4,
      "location_summary": "Santa Rosa, California • Council Bluffs, Iowa • Metairie, Louisiana + 1 more",
      "locations": [
        {
          "city": "Santa Rosa",
          "state": "California"
        },
        {
          "city": "Council Bluffs",
          "state": "Iowa"
        },
        {
          "city": "Metairie",
          "state": "Louisiana"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02258334"
    },
    {
      "nct_id": "NCT03698279",
      "title": "Safety and Immunogenicity of Different Dosages of High-Dose Quadrivalent Influenza Vaccine in Children 6 Months to 17 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "High-Dose Quadrivalent Influenza Vaccine (QIV-HD) 30 μg (split-virion, inactivated)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "High-Dose Quadrivalent Influenza Vaccine (QIV-HD) 45 μg, (split-virion, inactivated)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "High-Dose Quadrivalent Influenza Vaccine (QIV-HD) 60 µg (split-virion, inactivated)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluarix Quadrivalent Influenza vaccine (Unadjuvanted QIV-SD) (Inactivated)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "FLUAD Pediatric (adjuvanted TIV) (Surface Antigen, Inactivated)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Months to 17 Years"
      },
      "enrollment_count": 665,
      "start_date": "2018-10-09",
      "completion_date": "2019-10-16",
      "has_results": true,
      "last_update_posted_date": "2022-04-04",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 13,
      "location_summary": "San Diego, California • Miami, Florida • Atlanta, Georgia + 8 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "El Dorado",
          "state": "Kansas"
        },
        {
          "city": "Newton",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03698279"
    },
    {
      "nct_id": "NCT05947071",
      "title": "High vs.Standard Dose Influenza Vaccine in Pediatric Solid Organ Transplant (SOT) Recipients",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Immunization; Infection",
        "Transplantation Infection",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Standard Dose Quadrivalent Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "High Dose Quadrivalent Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "3 Years to 17 Years"
      },
      "enrollment_count": 312,
      "start_date": "2024-09-26",
      "completion_date": "2027-09-01",
      "has_results": false,
      "last_update_posted_date": "2026-04-21",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 8,
      "location_summary": "Stanford, California • Atlanta, Georgia • Chicago, Illinois + 5 more",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05947071"
    },
    {
      "nct_id": "NCT02554409",
      "title": "Sanofi Pasteur Quadrivalent Intradermal Influenza Vaccine Pregnancy Registry",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnancy",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Quadrivalent Intradermal Influenza Vaccine (QIV)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 87,
      "start_date": "2015-10-13",
      "completion_date": "2019-04-30",
      "has_results": false,
      "last_update_posted_date": "2020-02-12",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 5,
      "location_summary": "San Diego, California • Miami, Florida • Albany, New York + 2 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Albany",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02554409"
    },
    {
      "nct_id": "NCT00988143",
      "title": "A Study of Influenza Virus Vaccines in Children and Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "2009-2010 Trivalent Influenza Virus Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "2008-2009 Trivalent Influenza Virus Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Influenza Virus Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Months and older"
      },
      "enrollment_count": 600,
      "start_date": "2009-10",
      "completion_date": "2010-03",
      "has_results": true,
      "last_update_posted_date": "2013-12-12",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 4,
      "location_summary": "Durham, North Carolina • Cincinnati, Ohio • Jefferson Hills, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Jefferson Hills",
          "state": "Pennsylvania"
        },
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00988143"
    },
    {
      "nct_id": "NCT06229392",
      "title": "A Study to Evaluate the Intratumoral Influenza Vaccine Administration in Patients With Breast Cancer",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer",
        "Breast Cancer Triple Negative"
      ],
      "interventions": [
        {
          "name": "Fluzone Quadrivalent",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Rush University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2026-06-01",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-03-11",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06229392"
    },
    {
      "nct_id": "NCT03898973",
      "title": "Response to Inactivated Influenza Vaccine in Lymph Tissue and Blood",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Quadrivalent inactivated influenza vaccine (IIV)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "20 Years to 75 Years"
      },
      "enrollment_count": 0,
      "start_date": "2019-04-11",
      "completion_date": "2023-11-17",
      "has_results": false,
      "last_update_posted_date": "2023-11-21",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03898973"
    },
    {
      "nct_id": "NCT05215327",
      "title": "High vs. Standard Dose Influenza Vaccine in Lung Allograft Recipients",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Immunization; Infection",
        "Transplantation Infection",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "High Dose Quadrivalent Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Standard Dose Quadrivalent Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 270,
      "start_date": "2022-11-08",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-09-04",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05215327"
    },
    {
      "nct_id": "NCT01240746",
      "title": "Study of Quadrivalent Influenza Vaccine Among Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Licensed 2010-2011 Trivalent Influenza Vaccine, No Preservative",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Investigational Trivalent Influenza Vaccine with alternate B strain, No Preservative",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Influenza Vaccine, No Preservative",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "6 Months to 8 Years"
      },
      "enrollment_count": 4363,
      "start_date": "2010-11",
      "completion_date": "2012-02",
      "has_results": true,
      "last_update_posted_date": "2015-07-14",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 67,
      "location_summary": "Dothan, Alabama • Chandler, Arizona • Mesa, Arizona + 55 more",
      "locations": [
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01240746"
    },
    {
      "nct_id": "NCT02831751",
      "title": "Immunogenicity, Safety, and Tolerability of a Plant-Derived Quadrivalent VLP Influenza Vaccine in Elderly Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Virus Diseases",
        "RNA Virus Infections",
        "Respiratory Tract Diseases",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "30 µg/strain of Quadrivalent VLP Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "60 µg/strain of Quadrivalent VLP Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "FluLaval® Tetra (15 µg/strain)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone® High-Dose (60 µg/strain)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Medicago",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 1001,
      "start_date": "2016-04",
      "completion_date": "2017-01",
      "has_results": false,
      "last_update_posted_date": "2019-10-25",
      "last_synced_at": "2026-09-10T21:54:59.848Z",
      "location_count": 6,
      "location_summary": "Redding, California • Hollywood, Florida • South Miami, Florida + 3 more",
      "locations": [
        {
          "city": "Redding",
          "state": "California"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "South Miami",
          "state": "Florida"
        },
        {
          "city": "Savannah",
          "state": "Georgia"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02831751"
    }
  ]
}