{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=mRNA-1647",
    "query": {
      "intervention": "mRNA-1647"
    },
    "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": "2026-09-03T22:55:43.765Z",
  "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": "NCT05575492",
      "title": "A Study of mRNA-1647 Cytomegalovirus Vaccine in Healthy Participants 9 to 15 Years of Age and Participants 16 to 25 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Cytomegalovirus"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "9 Years to 25 Years"
      },
      "enrollment_count": 873,
      "start_date": "2022-11-07",
      "completion_date": "2026-05-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-04",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 44,
      "location_summary": "La Mesa, California • Sacramento, California • Fort Collins, Colorado + 38 more",
      "locations": [
        {
          "city": "La Mesa",
          "state": "California"
        },
        {
          "city": "La Mesa",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Fort Collins",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05575492"
    },
    {
      "nct_id": "NCT05085366",
      "title": "A Study to Evaluate the Efficacy, Safety, and Immunogenicity of mRNA-1647 Cytomegalovirus (CMV) Vaccine in Healthy Participants 16 to 40 Years of Age",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 40 Years · Female only"
      },
      "enrollment_count": 7454,
      "start_date": "2021-10-26",
      "completion_date": "2025-11-04",
      "has_results": false,
      "last_update_posted_date": "2025-12-15",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 181,
      "location_summary": "Birmingham, Alabama • Dothan, Alabama • Guntersville, Alabama + 141 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Guntersville",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05085366"
    },
    {
      "nct_id": "NCT05683457",
      "title": "A Study to Evaluate the Efficacy, Safety, and Immunogenicity of mRNA-1647 Cytomegalovirus (CMV) Vaccine in Allogenic Hematopoietic Cell Transplantation (HCT) Participants.",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 84,
      "start_date": "2023-04-05",
      "completion_date": "2027-03-06",
      "has_results": false,
      "last_update_posted_date": "2026-08-10",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 3,
      "location_summary": "Boston, Massachusetts • St Louis, Missouri • Seattle, Washington",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05683457"
    },
    {
      "nct_id": "NCT05105048",
      "title": "A Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of Cytomegalovirus (CMV) Vaccine mRNA-1647",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "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": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 9,
      "start_date": "2021-11-08",
      "completion_date": "2023-08-10",
      "has_results": false,
      "last_update_posted_date": "2023-09-11",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 3,
      "location_summary": "North Hollywood, California • San Diego, California • Honolulu, Hawaii",
      "locations": [
        {
          "city": "North Hollywood",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05105048"
    },
    {
      "nct_id": "NCT03382405",
      "title": "Safety, Reactogenicity, and Immunogenicity of Cytomegalovirus Vaccines mRNA-1647 and mRNA-1443 in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1443",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "18 Years to 49 Years"
      },
      "enrollment_count": 181,
      "start_date": "2017-11-13",
      "completion_date": "2020-10-28",
      "has_results": false,
      "last_update_posted_date": "2021-01-15",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 4,
      "location_summary": "Hollywood, Florida • Meridian, Idaho • Peoria, Illinois + 1 more",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Meridian",
          "state": "Idaho"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        },
        {
          "city": "Lenexa",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03382405"
    },
    {
      "nct_id": "NCT01195571",
      "title": "Safety Study of Four Chimera Cytomegalovirus (CMV) Vaccines in Healthy Adult Males 30-50 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cytomegalovirus"
      ],
      "interventions": [
        {
          "name": "cmv vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "CMV Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "50 Years",
        "sex": "MALE",
        "summary": "30 Years to 50 Years · Male only"
      },
      "enrollment_count": 36,
      "start_date": "2010-09",
      "completion_date": "2014-10",
      "has_results": false,
      "last_update_posted_date": "2015-05-19",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01195571"
    },
    {
      "nct_id": "NCT04232280",
      "title": "Dose-Finding Trial to Evaluate the Safety and Immunogenicity of Cytomegalovirus (CMV) Vaccine mRNA-1647 in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 315,
      "start_date": "2020-01-09",
      "completion_date": "2023-01-04",
      "has_results": true,
      "last_update_posted_date": "2026-05-05",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 9,
      "location_summary": "Sacramento, California • Peoria, Illinois • Lenexa, Kansas + 5 more",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        },
        {
          "city": "Lenexa",
          "state": "Kansas"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04232280"
    },
    {
      "nct_id": "NCT04975893",
      "title": "A Long-Term Extension Study to Evaluate the Immunogenicity and Safety of Cytomegalovirus (CMV) mRNA-1647 Vaccine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cytomegalovirus Infection"
      ],
      "interventions": [
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1647",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "ModernaTX, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 135,
      "start_date": "2021-06-18",
      "completion_date": "2026-01-19",
      "has_results": false,
      "last_update_posted_date": "2026-02-02",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 7,
      "location_summary": "Peoria, Illinois • Lenexa, Kansas • Lexington, Kentucky + 3 more",
      "locations": [
        {
          "city": "Peoria",
          "state": "Illinois"
        },
        {
          "city": "Lenexa",
          "state": "Kansas"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        },
        {
          "city": "Austin",
          "state": "Texas"
        },
        {
          "city": "Victoria",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04975893"
    },
    {
      "nct_id": "NCT05397223",
      "title": "A Study of Modified mRNA Vaccines in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "SARS-CoV-2",
        "Seasonal Influenza",
        "Respiratory Syncytial Virus",
        "Cytomegalovirus"
      ],
      "interventions": [
        {
          "name": "mRNA-1273",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1010",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1345",
          "type": "BIOLOGICAL"
        },
        {
          "name": "FLUAD®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "mRNA-1647",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ModernaTX, Inc.",
      "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": 308,
      "start_date": "2022-05-24",
      "completion_date": "2026-02-27",
      "has_results": false,
      "last_update_posted_date": "2026-03-12",
      "last_synced_at": "2026-09-03T22:55:43.765Z",
      "location_count": 8,
      "location_summary": "Hollywood, Florida • Savannah, Georgia • Sioux City, Iowa + 4 more",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Savannah",
          "state": "Georgia"
        },
        {
          "city": "Sioux City",
          "state": "Iowa"
        },
        {
          "city": "Lenexa",
          "state": "Kansas"
        },
        {
          "city": "Lincoln",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05397223"
    }
  ]
}