{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=JC+Virus+Infection",
    "query": {
      "condition": "JC Virus Infection"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=JC+Virus+Infection&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T05:26:19.924Z",
  "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": "NCT00342602",
      "title": "Genetics of Progressive Multifocal Leukoencephalopathy and Acquired Immunodeficiency Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "PML",
        "AIDS"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 450,
      "start_date": "2005-08",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2009-03-17",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 6,
      "location_summary": "Los Angeles, California • Chicago, Illinois • Baltimore, Maryland + 1 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00342602"
    },
    {
      "nct_id": "NCT00746941",
      "title": "Study to Explore the Effect of Mefloquine in Participants With Progressive Multifocal Leukoencephalopathy (PML)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Progressive Multifocal Leukoencephalopathy"
      ],
      "interventions": [
        {
          "name": "mefloquine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 37,
      "start_date": "2009-01",
      "completion_date": "2010-11",
      "has_results": true,
      "last_update_posted_date": "2014-07-31",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 5,
      "location_summary": "Chicago, Illinois • Baltimore, Maryland • Boston, Massachusetts + 2 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00746941"
    },
    {
      "nct_id": "NCT02479698",
      "title": "Cytotoxic T Lymphocytes in Treating Patients With Malignancies With BK and/or JC Virus",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acquired Immunodeficiency Syndrome",
        "BK Virus Infection",
        "Human Immunodeficiency Virus",
        "JC Virus Infection",
        "Malignant Neoplasm",
        "Merkel Cell Carcinoma",
        "Merkel Cell Polyomavirus Infection",
        "Viral Encephalitis"
      ],
      "interventions": [
        {
          "name": "Allogeneic BK-specific Cytotoxic T-lymphocytes",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 100,
      "start_date": "2015-07-23",
      "completion_date": "2027-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-20",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02479698"
    },
    {
      "nct_id": "NCT02108522",
      "title": "Multivirus-specific T Cells for the Treatment of Virus Infections After Stem Cell Transplant",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Infection"
      ],
      "interventions": [
        {
          "name": "Multivirus Specific T cells",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "AlloVir",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 82,
      "start_date": "2014-06",
      "completion_date": "2019-12",
      "has_results": true,
      "last_update_posted_date": "2021-07-20",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 2,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02108522"
    },
    {
      "nct_id": "NCT01070836",
      "title": "JC Virus Antibody Study of Participants With Relapsing Forms of MS Receiving Treatment With Natalizumab",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Relapsing Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "natalizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 35895,
      "start_date": "2010-03",
      "completion_date": "2015-11",
      "has_results": false,
      "last_update_posted_date": "2016-09-29",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 473,
      "location_summary": "Birmingham, Alabama • Cullman, Alabama • Tucaloosa, Alabama + 386 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Cullman",
          "state": "Alabama"
        },
        {
          "city": "Tucaloosa",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01070836"
    },
    {
      "nct_id": "NCT02004444",
      "title": "JC Virus Reactivation in Multiple Sclerosis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Progressive Multifocal Leukoencephalopathy",
        "Multiple Sclerosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Beth Israel Deaconess Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2010-10",
      "completion_date": "2016-01",
      "has_results": false,
      "last_update_posted_date": "2016-01-29",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02004444"
    },
    {
      "nct_id": "NCT05305040",
      "title": "Study of Posoleucel (ALVR105,Viralym-M) for Multi-Virus Prevention in Patients Post-Allogeneic Hematopoietic Cell Transplant",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Adenovirus Infection",
        "BK Virus Infection",
        "Cytomegalovirus Infections",
        "Epstein-Barr Virus Infections",
        "Human Herpes Virus-6 Infection",
        "JC Virus Infection"
      ],
      "interventions": [
        {
          "name": "Posoleucel (ALVR105)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "AlloVir",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 451,
      "start_date": "2022-03-24",
      "completion_date": "2024-01-30",
      "has_results": true,
      "last_update_posted_date": "2024-05-16",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 35,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • Duarte, California + 31 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05305040"
    },
    {
      "nct_id": "NCT04693637",
      "title": "Posoleucel (ALVR105, Formerly Viralym-M) for Multi-Virus Prevention in Patients Post-Allogeneic Hematopoietic Cell Transplant",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Adenovirus Infection",
        "BK Virus Infection",
        "Cytomegalovirus Infections",
        "Epstein-Barr Virus Infections",
        "Human Herpes Virus-6 Infection",
        "JC Virus Infection"
      ],
      "interventions": [
        {
          "name": "Posoleucel (ALVR105)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "AlloVir",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "1 Year and older"
      },
      "enrollment_count": 26,
      "start_date": "2021-01-15",
      "completion_date": "2023-01-19",
      "has_results": true,
      "last_update_posted_date": "2024-05-09",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 16,
      "location_summary": "Birmingham, Alabama • Duarte, California • San Francisco, California + 12 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Northwest Rectangle",
          "state": "District of Columbia"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04693637"
    },
    {
      "nct_id": "NCT01070823",
      "title": "JC-Virus (JCV) Antibody Program",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Tysabri® (natalizumab)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1096,
      "start_date": "2010-03",
      "completion_date": "2012-06",
      "has_results": false,
      "last_update_posted_date": "2016-10-05",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 11,
      "location_summary": "Aurora, Colorado • Atlanta, Georgia • Cullman, Georgia + 8 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Cullman",
          "state": "Georgia"
        },
        {
          "city": "Barrington",
          "state": "Illinois"
        },
        {
          "city": "Brighton",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01070823"
    },
    {
      "nct_id": "NCT01485003",
      "title": "Observational Study of Tysabri in Early Relapsing-Remitting Multiple Sclerosis in Anti-JC Virus Antibody Negative Participants",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Relapsing-Remitting Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "natalizumab",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 231,
      "start_date": "2012-02-07",
      "completion_date": "2018-11-26",
      "has_results": false,
      "last_update_posted_date": "2019-02-12",
      "last_synced_at": "2026-05-22T05:26:19.924Z",
      "location_count": 44,
      "location_summary": "Homewood, Alabama • Sun City, Arizona • La Jolla, California + 39 more",
      "locations": [
        {
          "city": "Homewood",
          "state": "Alabama"
        },
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01485003"
    }
  ]
}