{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Adverse+Event+Following+Immunization",
    "query": {
      "condition": "Adverse Event Following Immunization"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-10T20:33:55.923Z",
  "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": "NCT03183908",
      "title": "FLUAD® vs. Fluzone® High-Dose Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Pain",
        "Quality of Life",
        "Injection Site Reaction",
        "Side Effect of Drug",
        "Adverse Drug Event"
      ],
      "interventions": [
        {
          "name": "FLUAD®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone® High-Dose",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 757,
      "start_date": "2017-08-28",
      "completion_date": "2019-02-14",
      "has_results": true,
      "last_update_posted_date": "2021-03-30",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 4,
      "location_summary": "Atlanta, Georgia • Boston, Massachusetts • Durham, North Carolina + 1 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03183908"
    },
    {
      "nct_id": "NCT00164411",
      "title": "Pneumococcal Conjugate Vaccine With Pneumococcal Polysaccharide Vaccine and Tetanus/Diphtheria Vaccine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Pneumococcal Infections"
      ],
      "interventions": [
        {
          "name": "Tetanus-diphtheria toxoids (Td)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "7-valent pneumococcal conjugate vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "23-valent polysaccharide vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Centers for Disease Control and Prevention",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "50 Years to 64 Years"
      },
      "enrollment_count": 30,
      "start_date": "2004-01",
      "completion_date": "2005-03",
      "has_results": false,
      "last_update_posted_date": "2012-03-14",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00164411"
    },
    {
      "nct_id": "NCT05007041",
      "title": "Simultaneous RZV and aIIV4 Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Pain",
        "Quality of Life",
        "Injection Site Reaction",
        "Adverse Drug Event"
      ],
      "interventions": [
        {
          "name": "FLUAD® Quadrivalent",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone® High-Dose Quadrivalent",
          "type": "BIOLOGICAL"
        },
        {
          "name": "SHINGRIX®",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 267,
      "start_date": "2021-09-21",
      "completion_date": "2023-06-08",
      "has_results": true,
      "last_update_posted_date": "2024-07-11",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland • Durham, North Carolina",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05007041"
    },
    {
      "nct_id": "NCT01335412",
      "title": "Safety Surveillance After Immunization With IXIARO",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Japanese Encephalitis"
      ],
      "interventions": [
        {
          "name": "Japanese Encephalitis Virus vaccine, inactivated, adsorbed",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Valneva Austria GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "17 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "17 Years and older"
      },
      "enrollment_count": 20000,
      "start_date": "2011-03",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2015-03-10",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 1,
      "location_summary": "Alexandria, Virginia",
      "locations": [
        {
          "city": "Alexandria",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01335412"
    },
    {
      "nct_id": "NCT05157191",
      "title": "Safety of Pediatric COVID-19 Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pain",
        "Injection Site Reaction",
        "Adverse Drug Event"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "15 Years",
        "sex": "ALL",
        "summary": "5 Years to 15 Years"
      },
      "enrollment_count": 299,
      "start_date": "2022-04-06",
      "completion_date": "2023-10-27",
      "has_results": false,
      "last_update_posted_date": "2024-11-01",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 5,
      "location_summary": "Oakland, California • Atlanta, Georgia • New York, New York + 2 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05157191"
    },
    {
      "nct_id": "NCT05028361",
      "title": "Simultaneous mRNA COVID-19 and IIV4 Vaccination Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Quality of Life",
        "Injection Site Reaction",
        "Adverse Drug Event",
        "Systemic Reaction"
      ],
      "interventions": [
        {
          "name": "mRNA COVID-19",
          "type": "BIOLOGICAL"
        },
        {
          "name": "IIV4",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo (saline)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 348,
      "start_date": "2021-10-04",
      "completion_date": "2023-06-15",
      "has_results": true,
      "last_update_posted_date": "2024-03-19",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 3,
      "location_summary": "Baltimore, Maryland • Durham, North Carolina • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05028361"
    },
    {
      "nct_id": "NCT03969641",
      "title": "Safety of RIV4 Versus IIV4 in Pregnant Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Safety",
        "Adverse Event Following Immunisation",
        "Birth Outcomes"
      ],
      "interventions": [
        {
          "name": "Quadrivalent Recombinant Influenza Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Inactivated Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 384,
      "start_date": "2019-09-05",
      "completion_date": "2021-09-29",
      "has_results": true,
      "last_update_posted_date": "2023-01-11",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 3,
      "location_summary": "Boston, Massachusetts • Durham, North Carolina • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03969641"
    },
    {
      "nct_id": "NCT07158814",
      "title": "Safety of RSV Preventive Monoclonal Antibody",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Fever",
        "Adverse Event Following Immunisation"
      ],
      "interventions": [
        {
          "name": "Respiratory Syncytial Virus (RSV) Preventive Monoclonal Antibody",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Weeks",
        "maximum_age": "30 Weeks",
        "sex": "ALL",
        "summary": "6 Weeks to 30 Weeks"
      },
      "enrollment_count": 524,
      "start_date": "2025-10-02",
      "completion_date": "2027-04",
      "has_results": false,
      "last_update_posted_date": "2026-03-16",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 6,
      "location_summary": "Oakland, California • Atlanta, Georgia • New York, New York + 2 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07158814"
    },
    {
      "nct_id": "NCT06503900",
      "title": "Simultaneous mRNA COVID-19 and IIV Vaccination in Pregnancy Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Birth Outcomes",
        "Safety",
        "Adverse Event Following Immunization"
      ],
      "interventions": [
        {
          "name": "mRNA COVID-19 vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "IIV4 (quadrivalent inactivated influenza vaccine)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 98,
      "start_date": "2024-09-12",
      "completion_date": "2025-11-19",
      "has_results": false,
      "last_update_posted_date": "2026-01-15",
      "last_synced_at": "2026-06-10T20:33:55.923Z",
      "location_count": 6,
      "location_summary": "Atlanta, Georgia • Boston, Massachusetts • Durham, North Carolina + 2 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06503900"
    }
  ]
}