{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Egg+based+flu+vaccine",
    "query": {
      "intervention": "Egg based flu vaccine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 11,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Egg+based+flu+vaccine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T18:48:03.489Z",
  "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": "NCT05514002",
      "title": "Recombinant Influenza Vaccine Versus Standard Egg-Based Inactivated Influenza Vaccine in Adults 18-64 Years",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "Fluzone Quadrivalent",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flublok Quadrivalent",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Centers for Disease Control and Prevention",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 3988,
      "start_date": "2022-09-13",
      "completion_date": "2023-12-31",
      "has_results": true,
      "last_update_posted_date": "2026-07-30",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 4,
      "location_summary": "Tucson, Arizona • Tallahassee, Florida • Houston, Texas + 1 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tallahassee",
          "state": "Florida"
        },
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05514002"
    },
    {
      "nct_id": "NCT03734237",
      "title": "A Pragmatic Assessment of Influenza Vaccine Effectiveness in the DoD",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza",
        "Influenza-like Illness",
        "Influenza Vaccines"
      ],
      "interventions": [
        {
          "name": "Egg based influenza vaccines",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Recombinant influenza vaccines",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Cell-culture based influenza vaccines",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Henry M. Jackson Foundation for the Advancement of Military Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 15448,
      "start_date": "2018-11-06",
      "completion_date": "2026-06-30",
      "has_results": true,
      "last_update_posted_date": "2026-04-02",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 9,
      "location_summary": "San Diego, California • Annapolis, Maryland • Bethesda, Maryland + 5 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Annapolis",
          "state": "Maryland"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Fort Bragg",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03734237"
    },
    {
      "nct_id": "NCT01857206",
      "title": "Safety of Two Trivalent Influenza Vaccines Evaluated in Children and Adolescents 4 to 17 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza",
        "Fever"
      ],
      "interventions": [
        {
          "name": "Mammalian cell based flu vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Egg based flu vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novartis Vaccines",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "4 Years to 17 Years"
      },
      "enrollment_count": 2055,
      "start_date": "2013-05",
      "completion_date": "2014-06",
      "has_results": true,
      "last_update_posted_date": "2014-12-05",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 18,
      "location_summary": "Mobile, Alabama • Ponte Vedra, Florida • Augusta, Kansas + 12 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Ponte Vedra",
          "state": "Florida"
        },
        {
          "city": "Augusta",
          "state": "Kansas"
        },
        {
          "city": "Newton",
          "state": "Kansas"
        },
        {
          "city": "Wichita",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01857206"
    },
    {
      "nct_id": "NCT03722589",
      "title": "Immunogenicity Trial of Egg- Versus Non-Egg-Based Influenza Vaccines Among HCP",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Flublok",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flucelvax",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluarix",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone High-Dose",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Centers for Disease Control and Prevention",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 944,
      "start_date": "2018-09-12",
      "completion_date": "2020-07-31",
      "has_results": true,
      "last_update_posted_date": "2024-07-22",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 2,
      "location_summary": "Portland, Oregon • Temple, Texas",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Temple",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03722589"
    },
    {
      "nct_id": "NCT07779408",
      "title": "Study to Assess Safety and Immunogenicity of an Egg-based H5N8 Influenza Vaccine at Multiple Dose Levels Adjuvanted With Matrix-M in Healthy Participants 18 Years of Age and Above.",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Healthy Volunteers",
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Flu H5 egg pandemic low dose vaccine, with adjuvant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flu H5 Egg Pandemic medium dose vaccine, with adjuvant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flu H5 Egg Pandemic high dose vaccine, with adjuvant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Flu H5 Egg Pandemic high dose vaccine, without adjuvant",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 640,
      "start_date": "2026-08-03",
      "completion_date": "2028-02-22",
      "has_results": false,
      "last_update_posted_date": "2026-09-15",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 16,
      "location_summary": "Tempe, Arizona • Rolling Hills Estates, California • San Diego, California + 12 more",
      "locations": [
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Rolling Hills Estates",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07779408"
    },
    {
      "nct_id": "NCT05606965",
      "title": "A Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of mRNA-1010 in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "mRNA-1010",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Egg-based Quadrivalent Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Adjuvanted Quadrivalent Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1345",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1045",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 172,
      "start_date": "2022-11-02",
      "completion_date": "2025-11-13",
      "has_results": false,
      "last_update_posted_date": "2025-11-24",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05606965"
    },
    {
      "nct_id": "NCT00645411",
      "title": "Pediatric Safety and Immunogenicity Study of Cell-Culture Derived and Egg-based Subunit Influenza Vaccines in Healthy Children and Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Cell culture-derived influenza subunit vaccine (cTIV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Egg derived influenza subunit vaccine (eTIV)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novartis",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "3 Years to 17 Years"
      },
      "enrollment_count": 3604,
      "start_date": "2007-10",
      "completion_date": "2008-07",
      "has_results": true,
      "last_update_posted_date": "2015-11-23",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 16,
      "location_summary": "Fayetteville, Arkansas • Downey, California • Bardstown, Kentucky + 12 more",
      "locations": [
        {
          "city": "Fayetteville",
          "state": "Arkansas"
        },
        {
          "city": "Downey",
          "state": "California"
        },
        {
          "city": "Bardstown",
          "state": "Kentucky"
        },
        {
          "city": "Metairie",
          "state": "Louisiana"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00645411"
    },
    {
      "nct_id": "NCT05513391",
      "title": "Study With Quadrivalent Recombinant Influenza Vaccine (RIV4) Compared With Egg-Based Quadrivalent Influenza Vaccine (IIV4) in Participants Aged 3 to 8 Years",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza Immunization"
      ],
      "interventions": [
        {
          "name": "Recombinant influenza vaccine (RIV4)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent influenza vaccine (IIV4)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "3 Years to 8 Years"
      },
      "enrollment_count": 366,
      "start_date": "2022-11-10",
      "completion_date": "2023-10-03",
      "has_results": true,
      "last_update_posted_date": "2025-09-09",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 18,
      "location_summary": "Birmingham, Alabama • Jonesboro, Arkansas • San Diego, California + 14 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Sioux City",
          "state": "Iowa"
        },
        {
          "city": "Newton",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05513391"
    },
    {
      "nct_id": "NCT05755620",
      "title": "A Study to Evaluate the Safety and Immunogenicity of a Single Dose of H1ssF-3928 mRNA-LNP in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Influenza Virus Quadrivalent Inactivated Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Sodium Chloride, 0.9%",
          "type": "OTHER"
        },
        {
          "name": "VRC-FLUNPF099-00-VP (H1ssF_3928)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 50,
      "start_date": "2023-04-05",
      "completion_date": "2025-10-03",
      "has_results": false,
      "last_update_posted_date": "2026-06-18",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05755620"
    },
    {
      "nct_id": "NCT03598439",
      "title": "Randomized Influenza Vaccine Evaluation of Immune Response",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Standard IIV4",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Recombinant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Cell-culture",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 366,
      "start_date": "2018-07-30",
      "completion_date": "2024-07-09",
      "has_results": false,
      "last_update_posted_date": "2025-11-21",
      "last_synced_at": "2026-09-23T18:48:03.489Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03598439"
    }
  ]
}