{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Covid-19+vaccine",
    "query": {
      "intervention": "Covid-19 vaccine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 401,
    "total_pages": 41,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Covid-19+vaccine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T01:07:38.296Z",
  "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": "NCT04944095",
      "title": "Change in Antibody Levels Following SARS-CoV-2 (Covid-19) Vaccinations",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Covid-19",
        "Subjects Vaccinated Against Covid-19"
      ],
      "interventions": [
        {
          "name": "Change in SARS-CoV-2 Antibody Levels",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Dr. Sidney J. Stohs",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 10000,
      "start_date": "2021-08-10",
      "completion_date": "2024-12-31",
      "has_results": false,
      "last_update_posted_date": "2022-08-29",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 1,
      "location_summary": "Southlake, Texas",
      "locations": [
        {
          "city": "Southlake",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04944095"
    },
    {
      "nct_id": "NCT06505993",
      "title": "Addressing COVID-19 Vaccine Hesitancy With Muliti-Level Interventions in Appalachia",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "COVID-19",
        "Vaccine Hesitancy"
      ],
      "interventions": [
        {
          "name": "Health Communication",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Health Communication + Structural",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Marc Kiviniemi",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 0,
      "start_date": "2026-09",
      "completion_date": "2027-09",
      "has_results": false,
      "last_update_posted_date": "2026-08-06",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 1,
      "location_summary": "Hazard, Kentucky",
      "locations": [
        {
          "city": "Hazard",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06505993"
    },
    {
      "nct_id": "NCT05543993",
      "title": "COVID Booster in Pregnancy and Lactation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Bivalent COVID-19 Booster",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Thomas Jefferson University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "13 Years to 55 Years · Female only"
      },
      "enrollment_count": 150,
      "start_date": "2022-09-29",
      "completion_date": "2024-06-10",
      "has_results": false,
      "last_update_posted_date": "2025-12-02",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05543993"
    },
    {
      "nct_id": "NCT05973006",
      "title": "Phase 3 Adolescent Study for SARS-CoV-2 rS Variant Vaccines",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "NVX-CoV2601 co-formulated Omicron XBB.1.5 SARS-CoV-2 rS vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Prototype/XBB.1.5 Bivalent Vaccine (5 µg)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novavax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "11 Years to 18 Years"
      },
      "enrollment_count": 400,
      "start_date": "2023-08-16",
      "completion_date": "2024-09-30",
      "has_results": true,
      "last_update_posted_date": "2025-07-15",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 20,
      "location_summary": "Davie, Florida • Jacksonville, Florida • Miami, Florida + 17 more",
      "locations": [
        {
          "city": "Davie",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Meridian",
          "state": "Idaho"
        },
        {
          "city": "River Forest",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05973006"
    },
    {
      "nct_id": "NCT06672055",
      "title": "A Study to Evaluate VXA-CoV2-3.3 COVID-19 Vaccine Against Currently Approved/Authorized mRNA COVID-19 Injectable Booster Vaccine in Adults Previously Immunized Against COVID-19 Infection",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "SARS-CoV2",
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "VXA-CoV2-3.1",
          "type": "BIOLOGICAL"
        },
        {
          "name": "COMIRNATY®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "VXA-CoV2-3.3",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Vaxart",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5485,
      "start_date": "2024-10-08",
      "completion_date": "2027-05",
      "has_results": false,
      "last_update_posted_date": "2026-06-25",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 145,
      "location_summary": "Anniston, Alabama • Birmingham, Alabama • Mobile, Alabama + 126 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06672055"
    },
    {
      "nct_id": "NCT05158140",
      "title": "Safety, Tolerability, and Immunogenicity of V110 or V114 Co-administered With a Booster Dose of mRNA-1273 in Healthy Adults (V110-911)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pneumococcal Infection"
      ],
      "interventions": [
        {
          "name": "V110",
          "type": "BIOLOGICAL"
        },
        {
          "name": "V114",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1273",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo for V110",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo for V114",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Merck Sharp & Dohme LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 850,
      "start_date": "2022-01-12",
      "completion_date": "2023-02-21",
      "has_results": true,
      "last_update_posted_date": "2025-07-18",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 42,
      "location_summary": "North Hollywood, California • Northridge, California • Paramount, California + 38 more",
      "locations": [
        {
          "city": "North Hollywood",
          "state": "California"
        },
        {
          "city": "Northridge",
          "state": "California"
        },
        {
          "city": "Paramount",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05158140"
    },
    {
      "nct_id": "NCT06776367",
      "title": "Project REMOTE (REimagining Measurements and Operations of Translational Endpoints)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Remote study participation and self-collection of specimens",
          "type": "OTHER"
        },
        {
          "name": "Traditional clinical trial participation with clinician-collected specimens",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Biomedical Advanced Research and Development Authority",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1753,
      "start_date": "2024-12-20",
      "completion_date": "2026-08-19",
      "has_results": false,
      "last_update_posted_date": "2026-09-03",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 16,
      "location_summary": "Vestavia Hills, Alabama • Mesa, Arizona • Fair Oaks, California + 12 more",
      "locations": [
        {
          "city": "Vestavia Hills",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Fair Oaks",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06776367"
    },
    {
      "nct_id": "NCT05213000",
      "title": "Adjuvant Effect of Physical Exercise on Immune Response to COVID-19 Vaccination and Interactions With Stress",
      "overall_status": "RECRUITING",
      "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": "2026-09-29T01:07:38.296Z",
      "location_count": 1,
      "location_summary": "Ames, Iowa",
      "locations": [
        {
          "city": "Ames",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05213000"
    },
    {
      "nct_id": "NCT07798648",
      "title": "A Study of COVID-19 Vaccine(s) in Children and Adults",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "COVID-19 Vaccines"
      ],
      "interventions": [
        {
          "name": "BNT162b2",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "BioNTech SE",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 700,
      "start_date": "2026-08-31",
      "completion_date": "2027-04-21",
      "has_results": false,
      "last_update_posted_date": "2026-09-28",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 14,
      "location_summary": "Homestead, Florida • Miami Lakes, Florida • Atlanta, Georgia + 10 more",
      "locations": [
        {
          "city": "Homestead",
          "state": "Florida"
        },
        {
          "city": "Miami Lakes",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        },
        {
          "city": "Bardstown",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07798648"
    },
    {
      "nct_id": "NCT04910971",
      "title": "Quantification of Binding and Neutralizing Antibody Levels in COVID-19 Vaccinated Health Care Workers Over 1 Year",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19 Vaccine",
        "Corona Virus Infection",
        "Vaccine Adverse Reaction",
        "Vaccine Response",
        "Inflammation",
        "Thrombosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "LifeBridge Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2021-01-31",
      "completion_date": "2022-07-28",
      "has_results": false,
      "last_update_posted_date": "2021-06-02",
      "last_synced_at": "2026-09-29T01:07:38.296Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04910971"
    }
  ]
}