{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=COVID-19+vaccine&page=3",
    "query": {
      "intervention": "COVID-19 vaccine",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 403,
    "total_pages": 41,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=COVID-19+vaccine&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=COVID-19+vaccine&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T15:56:10.909Z",
  "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": "NCT04470427",
      "title": "A Study to Evaluate Efficacy, Safety, and Immunogenicity of mRNA-1273 Vaccine in Adults Aged 18 Years and Older to Prevent COVID-19",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "SARS-CoV-2"
      ],
      "interventions": [
        {
          "name": "mRNA-1273",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30415,
      "start_date": "2020-07-27",
      "completion_date": "2022-12-29",
      "has_results": true,
      "last_update_posted_date": "2024-03-21",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 100,
      "location_summary": "Birmingham, Alabama • Chandler, Arizona • Glendale, Arizona + 79 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04470427"
    },
    {
      "nct_id": "NCT05815498",
      "title": "A Study of mRNA-1283 Injection Compared With mRNA-1273 Injection in Participants ≥12 Years of Age to Prevent COVID-19",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "mRNA-1283.222",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1273.222",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1283.815",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1273.815",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 13553,
      "start_date": "2023-03-28",
      "completion_date": "2025-04-12",
      "has_results": true,
      "last_update_posted_date": "2026-05-01",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 161,
      "location_summary": "Huntsville, Alabama • Vestavia Hills, Alabama • Chandler, Arizona + 129 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Vestavia Hills",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05815498"
    },
    {
      "nct_id": "NCT05067933",
      "title": "A Ph 2 Trial With an Oral Tableted COVID-19 Vaccine",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "VXA-CoV2-1.1-S",
          "type": "DRUG"
        },
        {
          "name": "Placebo Tablets",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Vaxart",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 66,
      "start_date": "2021-10-22",
      "completion_date": "2023-05-09",
      "has_results": true,
      "last_update_posted_date": "2025-04-13",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 4,
      "location_summary": "Long Beach, California • Wichita, Kansas • Cleveland, Ohio + 1 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Wichita",
          "state": "Kansas"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Knoxville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05067933"
    },
    {
      "nct_id": "NCT05367908",
      "title": "A Study to Determine Antibody Levels After Receiving COVID-19 Boosters of Any Kind",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "SARS-CoV-2"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1501,
      "start_date": "2022-04-11",
      "completion_date": "2022-08-14",
      "has_results": false,
      "last_update_posted_date": "2022-10-13",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 1,
      "location_summary": "San Mateo, California",
      "locations": [
        {
          "city": "San Mateo",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05367908"
    },
    {
      "nct_id": "NCT05213000",
      "title": "Adjuvant Effect of Physical Exercise on Immune Response to COVID-19 Vaccination and Interactions With Stress",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Immunization"
      ],
      "interventions": [
        {
          "name": "Exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Iowa State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 80,
      "start_date": "2021-03-01",
      "completion_date": "2026-09-30",
      "has_results": false,
      "last_update_posted_date": "2023-08-24",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 1,
      "location_summary": "Ames, Iowa",
      "locations": [
        {
          "city": "Ames",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05213000"
    },
    {
      "nct_id": "NCT04761822",
      "title": "COVID19 SARS Vaccinations: Systemic Allergic Reactions to SARS-CoV-2 Vaccinations",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "SARS-CoV Infection",
        "COVID-19",
        "Allergic Reaction",
        "Mast Cell Disorder"
      ],
      "interventions": [
        {
          "name": "Moderna COVID-19 Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pfizer-BioNTech COVID-19 Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 746,
      "start_date": "2021-04-07",
      "completion_date": "2022-04-27",
      "has_results": true,
      "last_update_posted_date": "2025-08-12",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 29,
      "location_summary": "Tucson, Arizona • Little Rock, Arkansas • Los Angeles, California + 24 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04761822"
    },
    {
      "nct_id": "NCT04872738",
      "title": "Patient Experiences With the COVID-19 Vaccination After Breast Cancer Treatment",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer Related Lymphedema",
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Survey",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 714,
      "start_date": "2021-05-07",
      "completion_date": "2023-03-17",
      "has_results": true,
      "last_update_posted_date": "2026-01-06",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04872738"
    },
    {
      "nct_id": "NCT05858450",
      "title": "This Study Intends to Describe the Characteristics of Patients Given the Pfizer-BioNTech Bivalent mRNA COVID-19 Vaccine and Any Commercially Available Influenza Vaccines at the Same Time Versus at Different Times.",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Influenza, Human",
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Comirnaty",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Quadrivalent Influenza Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3442996,
      "start_date": "2023-05-05",
      "completion_date": "2023-05-12",
      "has_results": true,
      "last_update_posted_date": "2024-09-20",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05858450"
    },
    {
      "nct_id": "NCT04837651",
      "title": "Humoral and T-Cell Responses to COVID-19 Vaccination in Multiple Sclerosis Patients Treated With Ocrelizumab Treated With Ocrelizumab or Natalizumab",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis",
        "Demyelinating Autoimmune Diseases, CNS",
        "Autoimmune Diseases of the Nervous System",
        "Nervous System Diseases",
        "Demyelinating Diseases",
        "Autoimmune Diseases",
        "Immune System Diseases",
        "Pathologic Processes"
      ],
      "interventions": [
        {
          "name": "Elecsys semi-quantitative Anti-SARS-CoV-2 antibody test",
          "type": "DEVICE"
        },
        {
          "name": "T-Detect COVID T-cell blood test",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Dragonfly Research, LLC",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 48,
      "start_date": "2021-03-02",
      "completion_date": "2021-07-01",
      "has_results": false,
      "last_update_posted_date": "2021-08-02",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 1,
      "location_summary": "Wellesley, Massachusetts",
      "locations": [
        {
          "city": "Wellesley",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04837651"
    },
    {
      "nct_id": "NCT05139992",
      "title": "COVID-19 Vaccine Response in Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sickle Cell Disease",
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "COVID-19 Vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ASH Research Collaborative",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 59,
      "start_date": "2021-12-01",
      "completion_date": "2023-12-31",
      "has_results": true,
      "last_update_posted_date": "2025-02-14",
      "last_synced_at": "2026-10-08T15:56:10.909Z",
      "location_count": 8,
      "location_summary": "Oakland, California • Washington D.C., District of Columbia • Baltimore, Maryland + 5 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "The Bronx",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05139992"
    }
  ]
}