{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Influenza+Immunisation",
    "query": {
      "condition": "Influenza Immunisation"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 264,
    "total_pages": 27,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Influenza+Immunisation&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-10T07:27:49.196Z",
  "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": "NCT04110314",
      "title": "Patient Portal Reminder/Recall for Influenza Vaccination in a Health System- RCT 2",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "Portal Reminders for Influenza Vaccination: Gain-framed",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Portal Reminders for Influenza Vaccination: Loss-framed",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Pre-commitment prompt",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "4 Months and older"
      },
      "enrollment_count": 430636,
      "start_date": "2019-10-18",
      "completion_date": "2020-04-01",
      "has_results": true,
      "last_update_posted_date": "2022-05-05",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04110314"
    },
    {
      "nct_id": "NCT05624606",
      "title": "Safety and Immunogenicity of Quadrivalent Influenza mRNA Vaccine MRT5410 in Adult Participants 18 Years of Age and Older",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Influenza Immunization"
      ],
      "interventions": [
        {
          "name": "Quadrivalent Influenza mRNA Vaccine MRT5410",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Recombinant Influenza vaccine RIV4",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Inactivated Influenza Standard Dose QIV-SD",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Inactivated Influenza High Dose QIV-HD",
          "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": 682,
      "start_date": "2022-11-28",
      "completion_date": "2024-03-28",
      "has_results": false,
      "last_update_posted_date": "2025-03-18",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 23,
      "location_summary": "Huntington Park, California • Long Beach, California • North Hollywood, California + 19 more",
      "locations": [
        {
          "city": "Huntington Park",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "North Hollywood",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05624606"
    },
    {
      "nct_id": "NCT02882100",
      "title": "Adjuvanted Influenza Vaccination in U.S. Nursing Homes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza",
        "Influenza-like Illness"
      ],
      "interventions": [
        {
          "name": "adjuvanted trivalent influenza vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "trivalent influenza vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Insight Therapeutics, LLC",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 823,
      "start_date": "2016-04",
      "completion_date": "2023-01-25",
      "has_results": false,
      "last_update_posted_date": "2023-03-15",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02882100"
    },
    {
      "nct_id": "NCT00388583",
      "title": "Study of Inactivated, Split-Virion Influenza Vaccine Compared With Standard Fluzone Vaccine in Elderly Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Orthomyxoviridae Infection",
        "Influenza",
        "Myxovirus Infection"
      ],
      "interventions": [
        {
          "name": "Split, Inactivated, Trivalent Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 817,
      "start_date": "2006-09",
      "completion_date": "2008-09",
      "has_results": true,
      "last_update_posted_date": "2012-04-18",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 17,
      "location_summary": "Alabaster, Alabama • Tucson, Arizona • Fountain Valley, California + 14 more",
      "locations": [
        {
          "city": "Alabaster",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Pinellas Park",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00388583"
    },
    {
      "nct_id": "NCT00616928",
      "title": "Immunogenicity & Safety of GSK's Influenza Vaccine 1557484A Given to Adults Aged ≥18 Years",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4561,
      "start_date": "2008-01-23",
      "completion_date": "2009-03-19",
      "has_results": true,
      "last_update_posted_date": "2018-06-08",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 30,
      "location_summary": "Huntsville, Alabama • Phoenix, Arizona • Anaheim, California + 27 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Melbourne",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00616928"
    },
    {
      "nct_id": "NCT04176133",
      "title": "Entolimod on Immunosenescence in Healthy Geriatric Subjects Receiving Influenza Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Entolimod",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Influenza vaccine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Robert J. Pignolo",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 61,
      "start_date": "2019-10-30",
      "completion_date": "2022-03-30",
      "has_results": true,
      "last_update_posted_date": "2023-06-22",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04176133"
    },
    {
      "nct_id": "NCT03950986",
      "title": "Increasing Vaccine Uptake Among Veterans at the Atlanta VA Health Care System",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Tetanus",
        "Diphtheria",
        "Pertussis",
        "Pneumonia"
      ],
      "interventions": [
        {
          "name": "Modified clinical reminders",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Atlanta VA Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 67000,
      "start_date": "2018-10-15",
      "completion_date": "2019-06-30",
      "has_results": false,
      "last_update_posted_date": "2020-01-10",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Decatur, Georgia",
      "locations": [
        {
          "city": "Decatur",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03950986"
    },
    {
      "nct_id": "NCT02814643",
      "title": "Study to Evaluate the Potential Effect of Benralizumab on the Humoral Immune Response to the Seasonal Influenza Vaccination in Adolescent and Young Adult Patients With Severe Asthma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Benralizumab",
          "type": "DRUG"
        },
        {
          "name": "Benralizumab Placebo",
          "type": "DRUG"
        },
        {
          "name": "Seasonal influenza virus vaccine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "12 Years to 21 Years"
      },
      "enrollment_count": 103,
      "start_date": "2016-07-01",
      "completion_date": "2017-01-24",
      "has_results": true,
      "last_update_posted_date": "2018-10-24",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 24,
      "location_summary": "Birmingham, Alabama • Mesa, Arizona • Huntington Beach, California + 19 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02814643"
    },
    {
      "nct_id": "NCT00835926",
      "title": "A Study to Evaluate the Safety and Immune Responses to Fluzone® Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Influenza virus vaccine",
          "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": 121,
      "start_date": "2003-07",
      "completion_date": "2003-09",
      "has_results": true,
      "last_update_posted_date": "2016-04-14",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00835926"
    },
    {
      "nct_id": "NCT01522248",
      "title": "Early Immune Responses to Inactivated Influenza Vaccine: a Pilot Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza Virus Vaccine"
      ],
      "interventions": [
        {
          "name": "Trivalent Inactivated Influenza vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Johns Hopkins Bloomberg School of Public Health",
      "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": 20,
      "start_date": "2012-01",
      "completion_date": "2012-02",
      "has_results": true,
      "last_update_posted_date": "2019-03-15",
      "last_synced_at": "2026-06-10T07:27:49.196Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01522248"
    }
  ]
}