{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vaccine+Messaging",
    "query": {
      "intervention": "Vaccine Messaging"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 159,
    "total_pages": 16,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vaccine+Messaging&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T23:02:13.494Z",
  "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": "NCT03346915",
      "title": "Integrating a Health Information Technology System for Primary and Secondary Cervical Cancer Prevention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Human Papilloma Virus",
        "Cervical Cancer",
        "Human Papillomavirus Infection",
        "Oropharyngeal Cancer",
        "Vaginal Cancer",
        "Vulvar Cancer",
        "Anal Cancer",
        "Penile Cancer"
      ],
      "interventions": [
        {
          "name": "WoW and BNI",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Boston Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "9 Years to 65 Years"
      },
      "enrollment_count": 60,
      "start_date": "2018-08-14",
      "completion_date": "2019-04-19",
      "has_results": false,
      "last_update_posted_date": "2019-10-09",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03346915"
    },
    {
      "nct_id": "NCT04032106",
      "title": "HPV Vaccine Intervention for Young Sexual Minority Men",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy Subject"
      ],
      "interventions": [
        {
          "name": "Best Practice",
          "type": "OTHER"
        },
        {
          "name": "Informational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Text Message-Based Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL"
      ],
      "sponsor": "Ohio State University Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "25 Years",
        "sex": "MALE",
        "summary": "18 Years to 25 Years · Male only"
      },
      "enrollment_count": 1227,
      "start_date": "2019-10-03",
      "completion_date": "2022-03-31",
      "has_results": true,
      "last_update_posted_date": "2025-03-14",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 2,
      "location_summary": "Minneapolis, Minnesota • Columbus, Ohio",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04032106"
    },
    {
      "nct_id": "NCT01852656",
      "title": "Effectiveness of Influenza Vaccine Reminder Systems",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Asthma",
        "Chronic Obstructive Pulmonary Disease"
      ],
      "interventions": [
        {
          "name": "Postcard and IVR Reminder Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Postcard Only Reminder Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "IVR Only Reminder Group",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "19 Years to 64 Years"
      },
      "enrollment_count": 12255,
      "start_date": "2012-09",
      "completion_date": "2013-04",
      "has_results": false,
      "last_update_posted_date": "2013-05-14",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01852656"
    },
    {
      "nct_id": "NCT04801524",
      "title": "Text-based Reminders to Promote COVID-19 Vaccinations",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Covid19, Vaccines"
      ],
      "interventions": [
        {
          "name": "Self-benefit",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Prosocial-benefit",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Early access",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Fresh start",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 250000,
      "start_date": "2021-02-07",
      "completion_date": "2022-01-01",
      "has_results": false,
      "last_update_posted_date": "2022-09-13",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Westwood, Los Angeles, California",
      "locations": [
        {
          "city": "Westwood, Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04801524"
    },
    {
      "nct_id": "NCT06057727",
      "title": "Behavioral Economics to Improve Flu Vaccination Using EHR Nudges",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Behavior, Health",
        "Flu",
        "Flu Vaccination"
      ],
      "interventions": [
        {
          "name": "Pre-visit patient text messaging",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Default pended order",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Monthly peer comparison feedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "High risk bidirectional pre-visit text messaging",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 80039,
      "start_date": "2023-09-25",
      "completion_date": "2024-05-20",
      "has_results": true,
      "last_update_posted_date": "2025-04-27",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 2,
      "location_summary": "Philadelphia, Pennsylvania • Seattle, Washington",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06057727"
    },
    {
      "nct_id": "NCT03759236",
      "title": "Increasing Human Papillomavirus (HPV) Vaccine Uptake Via General Health Messaging",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Human Papilloma Virus"
      ],
      "interventions": [
        {
          "name": "Health Messaging via SMS",
          "type": "BEHAVIORAL"
        },
        {
          "name": "CDC Health Pamphlets",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "21 Years and older · Female only"
      },
      "enrollment_count": 3,
      "start_date": "2018-04-25",
      "completion_date": "2020-02-19",
      "has_results": false,
      "last_update_posted_date": "2025-04-01",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03759236"
    },
    {
      "nct_id": "NCT01146912",
      "title": "TextFluenza: Using Technology To Promote Flu Vaccination In Underserved Maternal And Child Populations",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Text Message",
          "type": "OTHER"
        },
        {
          "name": "automated call",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "6 Months to 50 Years"
      },
      "enrollment_count": 30537,
      "start_date": "2010-06",
      "completion_date": "2012-04",
      "has_results": true,
      "last_update_posted_date": "2015-10-07",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01146912"
    },
    {
      "nct_id": "NCT07171164",
      "title": "A Study to Evaluate Community-Based Measures to Increase RSV Vaccine Use Among Latino Adults",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Older Adults Without Any Specific Clinical Condition",
        "Social Networks",
        "RSV Immunization",
        "Vaccine Uptake"
      ],
      "interventions": [
        {
          "name": "Motivate Aim: CHW text message reminders and counseling",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Motivate Aim: CHW text message reminders only",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Activate Aim: CHW text message reminders and counseling",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Activate Aim: CHW text message reminders only",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 750,
      "start_date": "2025-09-10",
      "completion_date": "2028-11",
      "has_results": false,
      "last_update_posted_date": "2025-09-30",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07171164"
    },
    {
      "nct_id": "NCT01009645",
      "title": "The Effect of Fact Versus Myth Messages on Receipt of Influenza Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza Vaccination"
      ],
      "interventions": [
        {
          "name": "Fact Only Education Message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Fact and Myth Educational Message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Fact, Myth, Why Educational Message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control Educational Message",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 125,
      "start_date": "2009-09",
      "completion_date": "2010-04",
      "has_results": true,
      "last_update_posted_date": "2023-10-30",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01009645"
    },
    {
      "nct_id": "NCT04952376",
      "title": "Equitable Access to COVID-19 Vaccines",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Covid19"
      ],
      "interventions": [
        {
          "name": "SMS delivery of information",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Personalized text message delivery of information",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Interactive or 2-way SMS delivery of information",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1722,
      "start_date": "2021-04-01",
      "completion_date": "2021-06-10",
      "has_results": false,
      "last_update_posted_date": "2022-03-18",
      "last_synced_at": "2026-09-10T23:02:13.494Z",
      "location_count": 1,
      "location_summary": "Scottsdale, Arizona",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04952376"
    }
  ]
}