{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Recall+notices",
    "query": {
      "intervention": "Recall notices"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 7,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T12:03:28.497Z",
  "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": "NCT02993965",
      "title": "State Immunization Information Systems to Improve HPV Vaccination Rates",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vaccine",
        "Human Papiloma Virus Vaccine",
        "HPV Vaccine",
        "Immunization",
        "Health Registry",
        "Adolescent Health",
        "Reproductive Health",
        "Preventive Health Services"
      ],
      "interventions": [
        {
          "name": "Vaccine Reminder/Recall",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "11 Years to 17 Years"
      },
      "enrollment_count": 77716,
      "start_date": "2017-02-21",
      "completion_date": "2020-07-31",
      "has_results": false,
      "last_update_posted_date": "2020-08-20",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02993965"
    },
    {
      "nct_id": "NCT04587167",
      "title": "HPV Vaccine Communication ECHO for Primary Care Clinics",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Human Papillomavirus Vaccines",
        "Adolescent Health Services"
      ],
      "interventions": [
        {
          "name": "Project ECHO",
          "type": "OTHER"
        },
        {
          "name": "Announcement Approach Training",
          "type": "OTHER"
        },
        {
          "name": "Recall notices",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Milton S. Hershey Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2021-05-01",
      "completion_date": "2025-04-30",
      "has_results": true,
      "last_update_posted_date": "2026-02-24",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Hershey, Pennsylvania",
      "locations": [
        {
          "city": "Hershey",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04587167"
    },
    {
      "nct_id": "NCT03294473",
      "title": "Centralized Reminder Recall - Flu RCT2",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza, Human",
        "Orthomyxoviridae Infections",
        "RNA Virus Infections",
        "Virus Disease",
        "Respiratory Tract Infections",
        "Respiratory Tract Disease",
        "Vaccines",
        "Physiological Effects of Drugs"
      ],
      "interventions": [
        {
          "name": "R/R - Autodialers",
          "type": "BEHAVIORAL"
        },
        {
          "name": "R/R - Texting",
          "type": "BEHAVIORAL"
        },
        {
          "name": "R/R - mailed postcard",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Months to 17 Years"
      },
      "enrollment_count": 70190,
      "start_date": "2017-10-18",
      "completion_date": "2018-05-04",
      "has_results": false,
      "last_update_posted_date": "2019-06-05",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03294473"
    },
    {
      "nct_id": "NCT01557621",
      "title": "Comparative Effectiveness Trial of Two Reminder/Recall Methods to Increase Immunization Rates in Young Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Immunization Rates"
      ],
      "interventions": [
        {
          "name": "Collaborative Pop-Based R/R: Phone/Mail Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Collaborative Pop-Based R/R: Mail-Only Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Practice-based Recall",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Months",
        "maximum_age": "5 Years",
        "sex": "ALL",
        "summary": "19 Months to 5 Years"
      },
      "enrollment_count": 68000,
      "start_date": "2012-09",
      "completion_date": "2015-12",
      "has_results": false,
      "last_update_posted_date": "2015-12-16",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 2,
      "location_summary": "Aurora, Colorado • Denver, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01557621"
    },
    {
      "nct_id": "NCT03057379",
      "title": "HPV IIS Reminder/Recall- New York State",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Reminder Systems"
      ],
      "interventions": [
        {
          "name": "Vaccine Reminder Recall",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "11 Years to 17 Years"
      },
      "enrollment_count": 30616,
      "start_date": "2017-02-27",
      "completion_date": "2019-01-17",
      "has_results": false,
      "last_update_posted_date": "2020-04-28",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03057379"
    },
    {
      "nct_id": "NCT03294551",
      "title": "HPV Centralized R/R RCT #2 - New York State",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vaccines"
      ],
      "interventions": [
        {
          "name": "HPV Vaccine Reminder Recall - Autodialer",
          "type": "BEHAVIORAL"
        },
        {
          "name": "HPV Vaccine Reminder Recall - Texting",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "14 Years",
        "sex": "ALL",
        "summary": "11 Years to 14 Years"
      },
      "enrollment_count": 37003,
      "start_date": "2017-10-27",
      "completion_date": "2019-11-05",
      "has_results": false,
      "last_update_posted_date": "2021-05-27",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03294551"
    },
    {
      "nct_id": "NCT03666026",
      "title": "Patient Portal - Flu Reminder Recall",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Respiratory Tract Infections",
        "Vaccines"
      ],
      "interventions": [
        {
          "name": "1 MyChart R/R",
          "type": "BEHAVIORAL"
        },
        {
          "name": "2 MyChart R/R",
          "type": "BEHAVIORAL"
        },
        {
          "name": "3 MyChart R/R",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "4 Months and older"
      },
      "enrollment_count": 164205,
      "start_date": "2018-10-02",
      "completion_date": "2019-04-02",
      "has_results": true,
      "last_update_posted_date": "2021-11-17",
      "last_synced_at": "2026-09-03T12:03:28.497Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03666026"
    }
  ]
}