{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Randomized+booster", "query": { "intervention": "Randomized booster" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 246, "total_pages": 25, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Randomized+booster&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-06T11:24:34.156Z", "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": "NCT05220397", "title": "Janssen Ad26.CoV2.S Vaccine Booster in Kidney Transplant Recipients", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Kidney Transplant Recipient" ], "interventions": [ { "name": "Janssen Ad26.CoV2.S Vaccine", "type": "BIOLOGICAL" }, { "name": "Reduction in Immunosuppression Medication", "type": "OTHER" }, { "name": "Maintenance in Immunosuppression Medication", "type": "OTHER" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "Mark Stegall", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 468, "start_date": "2022-04-11", "completion_date": "2025-02-28", "has_results": true, "last_update_posted_date": "2025-09-15", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 3, "location_summary": "Phoenix, Arizona • Jacksonville, Florida • Rochester, Minnesota", "locations": [ { "city": "Phoenix", "state": "Arizona" }, { "city": "Jacksonville", "state": "Florida" }, { "city": "Rochester", "state": "Minnesota" } ], "official_url": "https://clinicaltrials.gov/study/NCT05220397" }, { "nct_id": "NCT04889209", "title": "Delayed Heterologous SARS-CoV-2 Vaccine Dosing (Boost) After Receipt of EUA Vaccines", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "COVID-19" ], "interventions": [ { "name": "Ad26.COV2.S", "type": "BIOLOGICAL" }, { "name": "BNT162b2", "type": "BIOLOGICAL" }, { "name": "mRNA-1273", "type": "BIOLOGICAL" }, { "name": "mRNA-1273.211", "type": "BIOLOGICAL" }, { "name": "mRNA-1273.222", "type": "BIOLOGICAL" }, { "name": "SARS-CoV-2 rS/M1", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "99 Years", "sex": "ALL", "summary": "18 Years to 99 Years" }, "enrollment_count": 867, "start_date": "2021-05-28", "completion_date": "2023-06-16", "has_results": true, "last_update_posted_date": "2025-04-20", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 10, "location_summary": "Decatur, Georgia • Baltimore, Maryland • New York, New York + 6 more", "locations": [ { "city": "Decatur", "state": "Georgia" }, { "city": "Baltimore", "state": "Maryland" }, { "city": "New York", "state": "New York" }, { "city": "Rochester", "state": "New York" }, { "city": "Cincinnati", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT04889209" }, { "nct_id": "NCT03548558", "title": "Testing Means to Scale Early Childhood Development Interventions in Rural Kenya", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Early Child Development" ], "interventions": [ { "name": "Group sessions", "type": "BEHAVIORAL" }, { "name": "Group+Home sessions", "type": "BEHAVIORAL" }, { "name": "Booster sessions", "type": "BEHAVIORAL" }, { "name": "Fathers invited", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "University of Southern California", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "15 Years", "maximum_age": null, "sex": "ALL", "summary": "15 Years and older" }, "enrollment_count": 1152, "start_date": "2018-10-01", "completion_date": "2021-10-15", "has_results": true, "last_update_posted_date": "2023-10-13", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 1, "location_summary": "Los Angeles, California", "locations": [ { "city": "Los Angeles", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03548558" }, { "nct_id": "NCT05422326", "title": "A Study to Evaluate Safety and Immunogenicity of One or Two Booster Vaccinations With H5N6 Influenza Vaccine in Adults Primed With H5N1 Influenza Vaccine or Unprimed", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza, Human", "Influenza in Birds", "Respiratory Tract Infections", "Infections", "Orthomyxoviridae Infections", "RNA Virus Infections", "Virus Diseases", "Respiratory Tract Diseases" ], "interventions": [ { "name": "aH5N6c on Day 1", "type": "BIOLOGICAL" }, { "name": "aH5N6c on Day 22", "type": "BIOLOGICAL" }, { "name": "Placebo on Day 22", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Seqirus", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 260, "start_date": "2022-07-18", "completion_date": "2023-03-24", "has_results": true, "last_update_posted_date": "2026-05-13", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 18, "location_summary": "Huntsville, Alabama • Tempe, Arizona • San Diego, California + 14 more", "locations": [ { "city": "Huntsville", "state": "Alabama" }, { "city": "Tempe", "state": "Arizona" }, { "city": "San Diego", "state": "California" }, { "city": "Milford", "state": "Connecticut" }, { "city": "Clearwater", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05422326" }, { "nct_id": "NCT05047770", "title": "A Study on the Immune Response and Safety of the Shingles Vaccine and the Influenza Vaccine When Either is Given to Healthy Adults at the Same Time or Following a COVID-19 Booster Vaccine", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Herpes Zoster" ], "interventions": [ { "name": "HZ/su", "type": "BIOLOGICAL" }, { "name": "Flu D-QIV", "type": "COMBINATION_PRODUCT" }, { "name": "mRNA-1273", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL", "COMBINATION_PRODUCT" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 2013, "start_date": "2021-10-07", "completion_date": "2022-08-31", "has_results": true, "last_update_posted_date": "2023-11-13", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 46, "location_summary": "Tempe, Arizona • Oxnard, California • San Diego, California + 40 more", "locations": [ { "city": "Tempe", "state": "Arizona" }, { "city": "Oxnard", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "Atlantis", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05047770" }, { "nct_id": "NCT00350337", "title": "Safety and Immunogenicity of Various Formulations of Live Attenuated Tetravalent Dengue Vaccine in Healthy US Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Dengue" ], "interventions": [ { "name": "Pre-transfection F17", "type": "BIOLOGICAL" }, { "name": "Post-transfection F17", "type": "BIOLOGICAL" }, { "name": "Post-transfection F19", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "OTHER" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "U.S. Army Medical Research and Development Command", "sponsor_class": "FED", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "45 Years", "sex": "ALL", "summary": "18 Years to 45 Years" }, "enrollment_count": 86, "start_date": "2006-04-05", "completion_date": "2008-03-13", "has_results": true, "last_update_posted_date": "2021-02-12", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 1, "location_summary": "Silver Spring, Maryland", "locations": [ { "city": "Silver Spring", "state": "Maryland" } ], "official_url": "https://clinicaltrials.gov/study/NCT00350337" }, { "nct_id": "NCT04668339", "title": "A Trial Evaluating the Safety and Effects of an RNA Vaccine ARCT-021 in Healthy Adults", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Covid19", "SARS-CoV Infection", "Corona Virus Infection" ], "interventions": [ { "name": "ARCT-021 single dose priming", "type": "BIOLOGICAL" }, { "name": "ARCT-021 two lower dose priming", "type": "BIOLOGICAL" }, { "name": "ARCT-021 two higher dose priming", "type": "BIOLOGICAL" }, { "name": "Placebo (two doses), priming", "type": "BIOLOGICAL" }, { "name": "Randomized booster", "type": "BIOLOGICAL" }, { "name": "Placebo booster", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Arcturus Therapeutics, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 581, "start_date": "2021-01-07", "completion_date": "2022-03-01", "has_results": true, "last_update_posted_date": "2025-05-15", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 12, "location_summary": "Chandler, Arizona • Tucson, Arizona • San Diego, California + 9 more", "locations": [ { "city": "Chandler", "state": "Arizona" }, { "city": "Tucson", "state": "Arizona" }, { "city": "San Diego", "state": "California" }, { "city": "Melbourne", "state": "Florida" }, { "city": "Orlando", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT04668339" }, { "nct_id": "NCT00876941", "title": "Assessing Screening Plus Brief Intervention's Resulting Efficacy (ASPIRE) to Stop Drug Use", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Drug Usage", "Drug Abuse", "Drug Dependence" ], "interventions": [ { "name": "Standard Brief Intervention", "type": "BEHAVIORAL" }, { "name": "Enhanced Brief Intervention", "type": "BEHAVIORAL" }, { "name": "Control: Information and Feedback", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "Boston Medical Center", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 589, "start_date": "2009-04", "completion_date": "2014-09", "has_results": false, "last_update_posted_date": "2014-10-02", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 1, "location_summary": "Boston, Massachusetts", "locations": [ { "city": "Boston", "state": "Massachusetts" } ], "official_url": "https://clinicaltrials.gov/study/NCT00876941" }, { "nct_id": "NCT04773639", "title": "Randomized Clinical Trial of a Multi-Modal Palliative Care Intervention", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Depression, Anxiety", "Metastatic Cancer" ], "interventions": [ { "name": "Multi-Modal Palliative Care Intervention", "type": "BEHAVIORAL" }, { "name": "Usual Care Control Condition", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "University of Colorado, Boulder", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 240, "start_date": "2021-01-11", "completion_date": "2025-01-31", "has_results": false, "last_update_posted_date": "2025-05-15", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 1, "location_summary": "Boulder, Colorado", "locations": [ { "city": "Boulder", "state": "Colorado" } ], "official_url": "https://clinicaltrials.gov/study/NCT04773639" }, { "nct_id": "NCT04368728", "title": "Study to Describe the Safety, Tolerability, Immunogenicity, and Efficacy of RNA Vaccine Candidates Against COVID-19 in Healthy Individuals", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2", "PHASE3" ], "conditions": [ "SARS-CoV-2 Infection", "COVID-19" ], "interventions": [ { "name": "BNT162b1", "type": "BIOLOGICAL" }, { "name": "BNT162b2", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "OTHER" }, { "name": "BNT162b2SA", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "BioNTech SE", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "12 Years", "maximum_age": null, "sex": "ALL", "summary": "12 Years and older" }, "enrollment_count": 46969, "start_date": "2020-04-29", "completion_date": "2023-02-10", "has_results": true, "last_update_posted_date": "2026-03-25", "last_synced_at": "2026-09-06T11:24:34.156Z", "location_count": 154, "location_summary": "Athens, Alabama • Birmingham, Alabama • Huntsville, Alabama + 106 more", "locations": [ { "city": "Athens", "state": "Alabama" }, { "city": "Birmingham", "state": "Alabama" }, { "city": "Huntsville", "state": "Alabama" }, { "city": "Huntsville", "state": "Alabama" }, { "city": "Mobile", "state": "Alabama" } ], "official_url": "https://clinicaltrials.gov/study/NCT04368728" } ] }