{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=COVID-19%3B+Immunity&page=2",
    "query": {
      "condition": "COVID-19; Immunity",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 76,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=COVID-19%3B+Immunity&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=COVID-19%3B+Immunity&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-01T01:21:24.881Z",
  "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": "NCT04562285",
      "title": "Sustained Immunity to COVID-19 as Measured by SARS-CoV-2 Serology Assays",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Serologic immunoassays to SARS-CoV-2 antibodies",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Henry Ford Health System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 829,
      "start_date": "2020-06-23",
      "completion_date": "2024-06-07",
      "has_results": false,
      "last_update_posted_date": "2025-12-03",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04562285"
    },
    {
      "nct_id": "NCT04025580",
      "title": "Systems Analyses of the Immune Response to the Seasonal Influenza Vaccine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Healthy Volunteer"
      ],
      "interventions": [
        {
          "name": "Flucelvax",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluvirin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Fluzone High Dose",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 98,
      "start_date": "2019-10-02",
      "completion_date": "2023-01-31",
      "has_results": true,
      "last_update_posted_date": "2024-01-02",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04025580"
    },
    {
      "nct_id": "NCT03944603",
      "title": "Longitudinal Innate Immunity and Aging Study",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy Older Adults Ages 60-89"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "60 Years to 89 Years"
      },
      "enrollment_count": 300,
      "start_date": "2019-04-30",
      "completion_date": "2025-03-31",
      "has_results": false,
      "last_update_posted_date": "2024-04-02",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03944603"
    },
    {
      "nct_id": "NCT05960097",
      "title": "A Study on the Safety and Immune Response of Investigational COVID-19 mRNA Vaccines in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "SARS-CoV-2",
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "CV0701 mRNA COVID-19 Vaccine (Low dose)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CV0701 mRNA COVID-19 Vaccine (Medium dose)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CV0701 mRNA COVID-19 Vaccine (High dose)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CV0601 mRNA COVID-19 Vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Control vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CV0801 mRNA COVID-19 Vaccine",
          "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": 692,
      "start_date": "2023-08-01",
      "completion_date": "2024-08-30",
      "has_results": true,
      "last_update_posted_date": "2025-10-23",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 3,
      "location_summary": "Sacramento, California • Hollywood, Florida • Peoria, Illinois",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05960097"
    },
    {
      "nct_id": "NCT04348942",
      "title": "A COVID-19 Symptom, Exposure and Immune Response Registry",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "ObvioHealth",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 804,
      "start_date": "2020-05-29",
      "completion_date": "2021-03-21",
      "has_results": false,
      "last_update_posted_date": "2022-03-04",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04348942"
    },
    {
      "nct_id": "NCT04736524",
      "title": "Immune Response Following COVID-19 Vaccination",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "IgM and IgG in Blood"
      ],
      "interventions": [
        {
          "name": "Rapid antibody test",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Texas Cardiac Arrhythmia Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "16 Years to 85 Years"
      },
      "enrollment_count": 500,
      "start_date": "2021-01-15",
      "completion_date": "2022-03",
      "has_results": false,
      "last_update_posted_date": "2021-02-03",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Austin, Texas",
      "locations": [
        {
          "city": "Austin",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04736524"
    },
    {
      "nct_id": "NCT04682548",
      "title": "Estimating Prevalence of COVID-19 Infection and SARS-CoV-2 Antibodies in MS Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis",
        "Covid19"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 920,
      "start_date": "2021-01-05",
      "completion_date": "2022-09-15",
      "has_results": false,
      "last_update_posted_date": "2022-11-03",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04682548"
    },
    {
      "nct_id": "NCT06821100",
      "title": "Thymalfasin (Thymosin Alpha 1; Ta1) as an Enhancer of Vaccine Response Among Older Adults Receiving Booster Doses of COVID-19 Vaccine",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vaccine Response",
        "COVID-19 Vaccine",
        "Immune Response to Covid 19 Vaccination"
      ],
      "interventions": [
        {
          "name": "Thymalfasin (Thymosin alpha 1, Ta1)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The Methodist Hospital Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "65 Years to 100 Years"
      },
      "enrollment_count": 75,
      "start_date": "2024-12-02",
      "completion_date": "2026-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-16",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06821100"
    },
    {
      "nct_id": "NCT04930055",
      "title": "Immune Responses in Oncology Patients to Novel Coronavirus Vaccines (IROC)",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "COVID-19 Vaccination",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2206,
      "start_date": "2021-06-30",
      "completion_date": "2022-03-08",
      "has_results": false,
      "last_update_posted_date": "2023-05-19",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 2,
      "location_summary": "Carmel, Indiana • Indianapolis, Indiana",
      "locations": [
        {
          "city": "Carmel",
          "state": "Indiana"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04930055"
    },
    {
      "nct_id": "NCT05131594",
      "title": "Evaluating the Response of the Immune System of People with Long COVID (post SARS-CoV-2)",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Huntington Memorial Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2021-10-13",
      "completion_date": "2026-06",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-10-01T01:21:24.881Z",
      "location_count": 1,
      "location_summary": "Pasadena, California",
      "locations": [
        {
          "city": "Pasadena",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05131594"
    }
  ]
}