{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Text+message+influenza+vaccine+reminders",
    "query": {
      "intervention": "Text message influenza vaccine reminders"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 14,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Text+message+influenza+vaccine+reminders&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T12:50:45.671Z",
  "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": "NCT01662583",
      "title": "Vaccine Health Literacy Related Text Message Reminders to Increase Receipt of Second Dose of Influenza Vaccine for Young, Low Income, Urban Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Text Message",
          "type": "OTHER"
        },
        {
          "name": "Written reminder",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "9 Years",
        "sex": "ALL",
        "summary": "6 Months to 9 Years"
      },
      "enrollment_count": 660,
      "start_date": "2012-09",
      "completion_date": "2013-06",
      "has_results": true,
      "last_update_posted_date": "2015-08-07",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01662583"
    },
    {
      "nct_id": "NCT04565353",
      "title": "Testing Multiple Behavioral Science Strategies to Increase Flu-Shot Rates",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza, Human"
      ],
      "interventions": [
        {
          "name": "Flu shot text messages",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 74811,
      "start_date": "2020-09-20",
      "completion_date": "2021-03-31",
      "has_results": true,
      "last_update_posted_date": "2022-02-01",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 2,
      "location_summary": "Danville, Pennsylvania • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Danville",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04565353"
    },
    {
      "nct_id": "NCT03516682",
      "title": "Reducing Delay in Vaccination of Children: Logistic Barriers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Communicable Disease"
      ],
      "interventions": [
        {
          "name": "Reminders",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "11 Months",
        "sex": "ALL",
        "summary": "1 Month to 11 Months"
      },
      "enrollment_count": 250,
      "start_date": "2018-06-01",
      "completion_date": "2019-03-31",
      "has_results": false,
      "last_update_posted_date": "2019-08-07",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03516682"
    },
    {
      "nct_id": "NCT01761734",
      "title": "Pilot Text Message for Influenza Vaccination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "text message",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1000,
      "start_date": "2013-01",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2014-06-24",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01761734"
    },
    {
      "nct_id": "NCT03287830",
      "title": "Flu2Text: Text Message Reminders for 2nd Dose of Influenza Vaccine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Vaccination"
      ],
      "interventions": [
        {
          "name": "Text message influenza vaccine reminders",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "6 Months to 8 Years"
      },
      "enrollment_count": 2105,
      "start_date": "2017-10-06",
      "completion_date": "2019-04-30",
      "has_results": true,
      "last_update_posted_date": "2023-09-15",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 3,
      "location_summary": "Itasca, Illinois • New York, New York • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Itasca",
          "state": "Illinois"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03287830"
    },
    {
      "nct_id": "NCT06626321",
      "title": "Behavioral Economics to Improve Flu Vaccination Using EHR Nudges Replication",
      "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": 26248,
      "start_date": "2024-10-21",
      "completion_date": "2025-05-28",
      "has_results": true,
      "last_update_posted_date": "2026-03-30",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "Lancaster, Pennsylvania",
      "locations": [
        {
          "city": "Lancaster",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06626321"
    },
    {
      "nct_id": "NCT06603090",
      "title": "Text4Vax: Text Message Reminders for Pediatric COVID-19 and Influenza Vaccines 2024-25 Season",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "COVID-19",
        "Vaccination Hesitancy"
      ],
      "interventions": [
        {
          "name": "Text message influenza vaccine reminders",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Text message COVID-19 vaccine reminders",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Text message influenza and COVID-19 vaccine reminders",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Columbia University",
      "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": 66147,
      "start_date": "2024-10-02",
      "completion_date": "2025-04-30",
      "has_results": false,
      "last_update_posted_date": "2025-07-11",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 4,
      "location_summary": "Itasca, Illinois • New York, New York • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Itasca",
          "state": "Illinois"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06603090"
    },
    {
      "nct_id": "NCT05535777",
      "title": "Patient Portal Flu Vaccine Reminders_RCT 5 (LADHS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "Enhanced texts with Callback by a Person",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Enhanced Bidirectional Texts",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Months and older"
      },
      "enrollment_count": 246295,
      "start_date": "2022-09-13",
      "completion_date": "2023-03-31",
      "has_results": true,
      "last_update_posted_date": "2025-04-11",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 2,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05535777"
    },
    {
      "nct_id": "NCT02284594",
      "title": "Adult Influenza Vaccination Text Message Reminders With Electronic Health Record Alerts",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "text message",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4026,
      "start_date": "2014-11",
      "completion_date": "2015-03",
      "has_results": false,
      "last_update_posted_date": "2015-05-19",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02284594"
    },
    {
      "nct_id": "NCT05525494",
      "title": "Patient Portal Flu Vaccine Reminders (5)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Respiratory Tract Infections"
      ],
      "interventions": [
        {
          "name": "Text Fixed R/R Messages with Direct Appointment Schedule Link",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Text Pre-Appointment Reminder",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Portal Pre-Commitment Prompt with Tailored R/R Messages with Direct Appointment Schedule Link",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Portal Fixed R/R Messages with Direct Appointment Schedule Link",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Portal Pre-Appointment Reminder",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Months and older"
      },
      "enrollment_count": 262085,
      "start_date": "2022-09-07",
      "completion_date": "2023-04-01",
      "has_results": true,
      "last_update_posted_date": "2024-08-07",
      "last_synced_at": "2026-09-29T12:50:45.671Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05525494"
    }
  ]
}