{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=hepatitis+A+%28HAV%29+vaccines&page=5",
    "query": {
      "intervention": "hepatitis A (HAV) vaccines",
      "page": 5
    },
    "page_size": 10
  },
  "pagination": {
    "page": 5,
    "page_size": 10,
    "total_count": 137,
    "total_pages": 14,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=hepatitis+A+%28HAV%29+vaccines&page=6&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=hepatitis+A+%28HAV%29+vaccines&page=4&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-13T16:43:28.612Z",
  "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": "NCT00985426",
      "title": "Comparing Safety and Immunogenicity of HEPLISAV-B® to Engerix-B® in Chronic Kidney Disease (CKD) Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "HEPLISAV-B",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Engerix-B",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Dynavax Technologies Corporation",
      "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": 521,
      "start_date": "2009-09",
      "completion_date": "2012-01",
      "has_results": true,
      "last_update_posted_date": "2021-05-19",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00985426"
    },
    {
      "nct_id": "NCT00142753",
      "title": "Immunologic Memory (Supp. of ATN 024)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Engerix B",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Twinrix for ATN 024",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Recombivax",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Twinrix for ATN 025",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "12 Years to 25 Years"
      },
      "enrollment_count": 95,
      "start_date": "2005-08",
      "completion_date": "2007-11",
      "has_results": false,
      "last_update_posted_date": "2017-02-28",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 4,
      "location_summary": "Los Angeles, California • San Franciso, California • Washington D.C., District of Columbia + 1 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Franciso",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00142753"
    },
    {
      "nct_id": "NCT00144313",
      "title": "VaxTeen Hepatitis B Vaccine Booster Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hepatitis"
      ],
      "interventions": [
        {
          "name": "hepatitis B vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Centers for Disease Control and Prevention",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "16 Years",
        "sex": "ALL",
        "summary": "13 Years to 16 Years"
      },
      "enrollment_count": 60,
      "start_date": "2005-08",
      "completion_date": "2006-01",
      "has_results": false,
      "last_update_posted_date": "2007-09-21",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 1,
      "location_summary": "Anchorage, Alaska",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00144313"
    },
    {
      "nct_id": "NCT00142740",
      "title": "Hepatitis B Vaccine Genetics: A Substudy of ATN 024 and ATN 025",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV Infection",
        "Hepatitis B"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "12 Years to 25 Years"
      },
      "enrollment_count": 337,
      "start_date": "2005-10",
      "completion_date": "2008-06",
      "has_results": false,
      "last_update_posted_date": "2017-02-28",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 4,
      "location_summary": "Los Angeles, California • San Franciso, California • Washington D.C., District of Columbia + 1 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Franciso",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00142740"
    },
    {
      "nct_id": "NCT01282762",
      "title": "Long-Term Study on Safety and Immunogenicity of HEPLISAV™ and Engerix-B® in Adults With Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "HEPLISAV",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Engerix-B",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Dynavax Technologies Corporation",
      "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": 147,
      "start_date": "2010-12",
      "completion_date": "2013-08",
      "has_results": false,
      "last_update_posted_date": "2019-03-20",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01282762"
    },
    {
      "nct_id": "NCT00050921",
      "title": "Administration of Growth Hormone to Increase CD4+ Count in Patients Taking Anti-HIV Drugs",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "somatropin",
          "type": "DRUG"
        },
        {
          "name": "Hepatitis A virus, inactivated",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Keyhole-Limpet Hemocyanin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "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": 60,
      "start_date": null,
      "completion_date": "2005-03",
      "has_results": false,
      "last_update_posted_date": "2021-11-01",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 13,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • Sacramento, California + 7 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00050921"
    },
    {
      "nct_id": "NCT05791851",
      "title": "Heplisav-B Revaccination for Hepatitis B Vaccine Nonresponders",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV Infections",
        "Hepatitis B",
        "Vaccine Response Impaired"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Maryland, Baltimore",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "109 Years",
        "sex": "ALL",
        "summary": "18 Years to 109 Years"
      },
      "enrollment_count": 31,
      "start_date": "2019-10-23",
      "completion_date": "2022-06-14",
      "has_results": false,
      "last_update_posted_date": "2023-03-30",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05791851"
    },
    {
      "nct_id": "NCT00958763",
      "title": "Alcohol Use Reduction in Methadone Individuals With Hepatitis C Virus(HCV)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatitis C"
      ],
      "interventions": [
        {
          "name": "Motivational Interviewing, Single - MIS",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Motivational Interviewing Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Usual Care Group - UCG",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "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": 219,
      "start_date": "2006-03",
      "completion_date": "2008-12",
      "has_results": false,
      "last_update_posted_date": "2009-08-13",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 3,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00958763"
    },
    {
      "nct_id": "NCT02429583",
      "title": "Effects of Persistent Innate Immune Activation on Vaccine Efficacy",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hepatitis C Infection"
      ],
      "interventions": [
        {
          "name": "Recombivax",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Rockefeller University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "62 Years",
        "sex": "ALL",
        "summary": "18 Years to 62 Years"
      },
      "enrollment_count": 24,
      "start_date": "2015-05-08",
      "completion_date": "2018-11",
      "has_results": true,
      "last_update_posted_date": "2020-03-04",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02429583"
    },
    {
      "nct_id": "NCT07493460",
      "title": "Longitudinal Tracking of Bone Marrow Plasma Cell Responses to Licensed Human Vaccines",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Immunology",
        "Healthy Adults"
      ],
      "interventions": [
        {
          "name": "trivalent inactivated influenza vaccine (TIV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "nonavalent HPV vaccine (HPV)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "hepatitis A (HAV) vaccines",
          "type": "BIOLOGICAL"
        },
        {
          "name": "tetanus, diphtheria and acellular pertussis vaccine (Tdap)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2025-08-26",
      "completion_date": "2027-08",
      "has_results": false,
      "last_update_posted_date": "2026-07-01",
      "last_synced_at": "2026-10-13T16:43:28.612Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07493460"
    }
  ]
}