{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Immunization+Rates&page=2",
    "query": {
      "condition": "Immunization Rates",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Immunization+Rates&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-06-11T09:23:23.745Z",
  "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": "NCT01206686",
      "title": "The Effect of Time-Slot Scheduling on Flu Vaccination Rates",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Seasonal Influenza"
      ],
      "interventions": [
        {
          "name": "Planning Prompt",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Default Appointment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50000,
      "start_date": "2009-09",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2016-08-17",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01206686"
    },
    {
      "nct_id": "NCT01732315",
      "title": "Adolescent Vaccination Reminder Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Adolescent Vaccination Status"
      ],
      "interventions": [
        {
          "name": "Email Notification",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3783,
      "start_date": "2012-10",
      "completion_date": "2014-12",
      "has_results": false,
      "last_update_posted_date": "2015-08-17",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01732315"
    },
    {
      "nct_id": "NCT04939519",
      "title": "SCALE-UP Utah: Community-Academic Partnership to Address COVID-19 Vaccination Rates Among Utah Community Health Centers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Text-Messaging (TM)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Patient Navigation (PN)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 65300,
      "start_date": "2021-03-29",
      "completion_date": "2023-02-28",
      "has_results": true,
      "last_update_posted_date": "2025-12-12",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04939519"
    },
    {
      "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": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02993965"
    },
    {
      "nct_id": "NCT03039725",
      "title": "Vaccination Compliance",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Vaccine Compliance"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Jaye Shyken, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "14 Years to 55 Years · Female only"
      },
      "enrollment_count": 99,
      "start_date": "2017-05-01",
      "completion_date": "2017-08-28",
      "has_results": false,
      "last_update_posted_date": "2017-11-21",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03039725"
    },
    {
      "nct_id": "NCT06598475",
      "title": "Investigating Facilitator-driven, Multi-level Implementation Strategies in Federally Qualified Health Centers to Improve Provider Recommendation and HPV Vaccination Rates Among Latino/a Adolescents",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Human Papillomavirus Infection"
      ],
      "interventions": [
        {
          "name": "Facilitator-driven provider- and practice-level implementation strategies for influencing provider recommendations and practice-level HPV vaccination rates",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "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": 225,
      "start_date": "2025-03-13",
      "completion_date": "2028-08-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-04",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06598475"
    },
    {
      "nct_id": "NCT01467934",
      "title": "FeverText: Assessing Fever Rates After Vaccination During the 2011-12 Influenza Season Using Text Messaging",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Fever"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "23 Months",
        "sex": "ALL",
        "summary": "6 Months to 23 Months"
      },
      "enrollment_count": 530,
      "start_date": "2011-11",
      "completion_date": "2012-06",
      "has_results": true,
      "last_update_posted_date": "2014-07-21",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 2,
      "location_summary": "Atlanta, Georgia • New York, New York",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01467934"
    },
    {
      "nct_id": "NCT01946594",
      "title": "Clinical Immunization Safety Assessment (CISA) Project: Pilot Study to Assess the Effect of Prophylactic Antipyretics on Immune Responses and Fever After IIV",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Fever"
      ],
      "interventions": [
        {
          "name": "Acetaminophen",
          "type": "OTHER"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "35 Months",
        "sex": "ALL",
        "summary": "12 Months to 35 Months"
      },
      "enrollment_count": 41,
      "start_date": "2013-10",
      "completion_date": "2014-03",
      "has_results": false,
      "last_update_posted_date": "2016-01-20",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01946594"
    },
    {
      "nct_id": "NCT02227186",
      "title": "Efficacy Study of School-located Influenza Vaccination Clinics to Increase Influenza Vaccination Rates in Monroe County, New York",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Childhood Influenza Vaccination",
        "School-located Influenza Vaccination"
      ],
      "interventions": [
        {
          "name": "School-located Influenza Vaccination Clinic",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "4 Years to 19 Years"
      },
      "enrollment_count": 20461,
      "start_date": "2014-08-01",
      "completion_date": "2015-07-31",
      "has_results": false,
      "last_update_posted_date": "2017-05-01",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02227186"
    },
    {
      "nct_id": "NCT02266277",
      "title": "System Alignment for VaccinE Delivery (SAVED): Improving Rates of Influenza and Pneumococcal Vaccination Through Patient Outreach, Improved Medical Record Accuracy and Targeted Physician Alerts",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Infections, Pneumococcal"
      ],
      "interventions": [
        {
          "name": "Arm 1: E-portal message with IVR call",
          "type": "OTHER"
        },
        {
          "name": "Arm 2: E-portal message with no IVR call",
          "type": "OTHER"
        },
        {
          "name": "Arm 3: No e-portal message with IVR call",
          "type": "OTHER"
        },
        {
          "name": "Arm 5: IVR call",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30000,
      "start_date": "2014-11",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2017-05-31",
      "last_synced_at": "2026-06-11T09:23:23.745Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02266277"
    }
  ]
}