{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Standard+Vaccine+Message&page=2", "query": { "intervention": "Standard Vaccine Message", "page": 2 }, "page_size": 10 }, "pagination": { "page": 2, "page_size": 10, "total_count": 36, "total_pages": 4, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Standard+Vaccine+Message&page=3&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Standard+Vaccine+Message&page=1&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-17T15:20:04.937Z", "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": "NCT07132125", "title": "Conversations With AI Chatbots Increase Short-Term Vaccine Intentions But Do Not Outperform Standard Public Health Messaging", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "HPV Vaccination Intent" ], "interventions": [ { "name": "Default-style LLM chatbot", "type": "BEHAVIORAL" }, { "name": "Conversational-style LLM chatbot", "type": "BEHAVIORAL" }, { "name": "Public health informational materials", "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": 930, "start_date": "2025-03-17", "completion_date": "2025-05-22", "has_results": false, "last_update_posted_date": "2025-08-20", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Philadelphia, Pennsylvania", "locations": [ { "city": "Philadelphia", "state": "Pennsylvania" } ], "official_url": "https://clinicaltrials.gov/study/NCT07132125" }, { "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": "2026-10-17T15:20:04.937Z", "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": "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": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Los Angeles, California", "locations": [ { "city": "Los Angeles", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03294473" }, { "nct_id": "NCT06156228", "title": "Multilevel Intervention of COVID-19 Vaccine Uptake Among Latinos", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vaccine Hesitancy" ], "interventions": [ { "name": "Multilevel Intervention", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "San Diego State University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 238, "start_date": "2024-03-06", "completion_date": "2025-04-01", "has_results": false, "last_update_posted_date": "2025-07-04", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 2, "location_summary": "San Diego, California", "locations": [ { "city": "San Diego", "state": "California" }, { "city": "San Diego", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT06156228" }, { "nct_id": "NCT04834726", "title": "COVID-19 Vaccine Text Outreach", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Covid19" ], "interventions": [ { "name": "Opt-In (Call-Back)", "type": "BEHAVIORAL" }, { "name": "Opt-in (In-Bound)", "type": "BEHAVIORAL" }, { "name": "Standard Message", "type": "BEHAVIORAL" }, { "name": "Clinician Endorsement", "type": "BEHAVIORAL" }, { "name": "Scarcity", "type": "BEHAVIORAL" }, { "name": "Opt-Out Framing", "type": "BEHAVIORAL" }, { "name": "Phone Call", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "University of Pennsylvania", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "16 Years", "maximum_age": null, "sex": "ALL", "summary": "16 Years and older" }, "enrollment_count": 19554, "start_date": "2021-04-29", "completion_date": "2021-07-06", "has_results": true, "last_update_posted_date": "2023-03-27", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Philadelphia, Pennsylvania", "locations": [ { "city": "Philadelphia", "state": "Pennsylvania" } ], "official_url": "https://clinicaltrials.gov/study/NCT04834726" }, { "nct_id": "NCT06274359", "title": "Digital Storytelling to Reduce Pediatric Influenza Vaccination Disparities", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Digital storytelling", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "Denver Health and Hospital Authority", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "90 Years", "sex": "ALL", "summary": "18 Years to 90 Years" }, "enrollment_count": 398, "start_date": "2024-08-02", "completion_date": "2025-03-31", "has_results": true, "last_update_posted_date": "2026-08-28", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 2, "location_summary": "Denver, Colorado", "locations": [ { "city": "Denver", "state": "Colorado" }, { "city": "Denver", "state": "Colorado" } ], "official_url": "https://clinicaltrials.gov/study/NCT06274359" }, { "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": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Lancaster, Pennsylvania", "locations": [ { "city": "Lancaster", "state": "Pennsylvania" } ], "official_url": "https://clinicaltrials.gov/study/NCT06626321" }, { "nct_id": "NCT06566534", "title": "Personalized Nudging to Increase Influenza Vaccinations", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "Reminder", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "Geisinger Clinic", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 77482, "start_date": "2024-09-09", "completion_date": "2024-12-31", "has_results": false, "last_update_posted_date": "2025-01-16", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Danville, Pennsylvania", "locations": [ { "city": "Danville", "state": "Pennsylvania" } ], "official_url": "https://clinicaltrials.gov/study/NCT06566534" }, { "nct_id": "NCT06062264", "title": "Patient Portal Flu Vaccine Reminders (RCT 6)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Influenza", "Respiratory Tract Infections" ], "interventions": [ { "name": "Portal-based Video Message", "type": "BEHAVIORAL" }, { "name": "Portal-based Infographic Message", "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": 22233, "start_date": "2023-10-03", "completion_date": "2024-04-01", "has_results": true, "last_update_posted_date": "2025-04-20", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Los Angeles, California", "locations": [ { "city": "Los Angeles", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT06062264" }, { "nct_id": "NCT07878442", "title": "Tailored Vaccine Messaging for Parents/Caregivers of Adolescents", "overall_status": "NOT_YET_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Vaccine Confidence", "Adolescent Vaccination", "Vaccine Uptake" ], "interventions": [ { "name": "Tailored Vaccine Messaging", "type": "BEHAVIORAL" }, { "name": "Standard Vaccine Message", "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": 2000, "start_date": "2026-10", "completion_date": "2027-04", "has_results": false, "last_update_posted_date": "2026-10-16", "last_synced_at": "2026-10-17T15:20:04.937Z", "location_count": 1, "location_summary": "Salt Lake City, Utah", "locations": [ { "city": "Salt Lake City", "state": "Utah" } ], "official_url": "https://clinicaltrials.gov/study/NCT07878442" } ] }