{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Flu+Vaccine+%28Year+4%29&page=2", "query": { "intervention": "Flu Vaccine (Year 4)", "page": 2 }, "page_size": 10 }, "pagination": { "page": 2, "page_size": 10, "total_count": 88, "total_pages": 9, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Flu+Vaccine+%28Year+4%29&page=3&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Flu+Vaccine+%28Year+4%29&page=1&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-07T22:06:21.318Z", "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": "NCT01868334", "title": "SOP Toolkit in Diverse Practices Implemented & Tested With RE-AIM", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Adult Influenza Vaccinations", "Adult PPSV Vaccinations", "Adult Tdap/Td Vaccinations" ], "interventions": [ { "name": "Pillar 1: Convenient Vaccination Services", "type": "BEHAVIORAL" }, { "name": "Pillar 2: Patient notification", "type": "BEHAVIORAL" }, { "name": "Pillar 3: Enhanced Office Systems", "type": "BEHAVIORAL" }, { "name": "Pillar 4: Motivation", "type": "BEHAVIORAL" } ], "intervention_types": [ "BEHAVIORAL" ], "sponsor": "University of Pittsburgh", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 70549, "start_date": "2013-04", "completion_date": "2015-12", "has_results": true, "last_update_posted_date": "2023-10-06", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 2, "location_summary": "Pittsburgh, Pennsylvania • Houston, Texas", "locations": [ { "city": "Pittsburgh", "state": "Pennsylvania" }, { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01868334" }, { "nct_id": "NCT00943878", "title": "Sanofi H1N1 + TIV - Adults and Elderly", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Trivalent inactivated influenza vaccine", "type": "BIOLOGICAL" }, { "name": "Inactivated H1N1 Vaccine", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "BIOLOGICAL", "DRUG" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 805, "start_date": "2009-08", "completion_date": "2010-04", "has_results": true, "last_update_posted_date": "2012-08-01", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 5, "location_summary": "Decatur, Georgia • St Louis, Missouri • Cincinnati, Ohio + 2 more", "locations": [ { "city": "Decatur", "state": "Georgia" }, { "city": "St Louis", "state": "Missouri" }, { "city": "Cincinnati", "state": "Ohio" }, { "city": "Nashville", "state": "Tennessee" }, { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT00943878" }, { "nct_id": "NCT05553301", "title": "Safety and Immunogenicity of Quadrivalent Influenza mRNA Vaccine MRT5407 in Adult Participants18 Years of Age and Older", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Influenza Immunization" ], "interventions": [ { "name": "Quadrivalent Influenza mRNA Vaccine MRT5407", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Recombinant Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza Standard Dose Vaccine", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza High-Dose Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Sanofi Pasteur, a Sanofi Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 560, "start_date": "2022-10-03", "completion_date": "2024-01-19", "has_results": false, "last_update_posted_date": "2025-01-24", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 23, "location_summary": "Rolling Hills Estates, California • San Diego, California • DeLand, Florida + 16 more", "locations": [ { "city": "Rolling Hills Estates", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "DeLand", "state": "Florida" }, { "city": "Gainesville", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05553301" }, { "nct_id": "NCT01959945", "title": "Safety, Reactogenicity and Immunogenicity of Flublok Quadrivalent (Recombinant Influenza Vaccine,Seasonal Formulation)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flublok® Quadrivalent Influenza Virus Vaccine", "type": "BIOLOGICAL" }, { "name": "Fluarix Quadrivalent® Influenza Virus Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Protein Sciences Corporation", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "6 Years", "maximum_age": "17 Years", "sex": "ALL", "summary": "6 Years to 17 Years" }, "enrollment_count": 219, "start_date": "2013-11", "completion_date": "2014-10", "has_results": true, "last_update_posted_date": "2016-09-23", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 1, "location_summary": "Auburn, Maine", "locations": [ { "city": "Auburn", "state": "Maine" } ], "official_url": "https://clinicaltrials.gov/study/NCT01959945" }, { "nct_id": "NCT02290509", "title": "Safety and Immunogenicity of Flublok Quadrivalent vs IIV4 in Adults 18-49 Years of Age", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flublok Quadrivalent", "type": "BIOLOGICAL" }, { "name": "Inactivated Influenza Vaccine (IIV4)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Protein Sciences Corporation", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "49 Years", "sex": "ALL", "summary": "18 Years to 49 Years" }, "enrollment_count": 1350, "start_date": "2014-10", "completion_date": "2015-05", "has_results": true, "last_update_posted_date": "2016-10-27", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 10, "location_summary": "Sacramento, California • Coral Gables, Florida • Savannah, Georgia + 7 more", "locations": [ { "city": "Sacramento", "state": "California" }, { "city": "Coral Gables", "state": "Florida" }, { "city": "Savannah", "state": "Georgia" }, { "city": "Wichita", "state": "Kansas" }, { "city": "Metairie", "state": "Louisiana" } ], "official_url": "https://clinicaltrials.gov/study/NCT02290509" }, { "nct_id": "NCT03275389", "title": "A Study to Evaluate the Reactogenicity, Safety and Immunogenicity of GlaxoSmithKline (GSK) Biologicals' Investigational Supra-seasonal Universal Influenza Vaccines - Inactivated (SUIVs) (GSK3816302A) in Healthy Adults Aged 18 to 39 Years", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "D-SUIV cH8/1N1+AS03", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH5/1N1+AS03", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH11/1N1+AS03", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH8/1N1+AS01", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH5/1N1+AS01", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH11/1N1+AS01", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH8/1N1", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH5/1N1", "type": "BIOLOGICAL" }, { "name": "D-SUIV cH11/1N1", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "BIOLOGICAL" }, { "name": "Fluarix Quadrivalent", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "39 Years", "sex": "ALL", "summary": "18 Years to 39 Years" }, "enrollment_count": 470, "start_date": "2017-09-08", "completion_date": "2020-03-26", "has_results": true, "last_update_posted_date": "2021-05-07", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 5, "location_summary": "South Miami, Florida • Wichita, Kansas • Rochester, New York + 2 more", "locations": [ { "city": "South Miami", "state": "Florida" }, { "city": "Wichita", "state": "Kansas" }, { "city": "Rochester", "state": "New York" }, { "city": "Austin", "state": "Texas" }, { "city": "Norfolk", "state": "Virginia" } ], "official_url": "https://clinicaltrials.gov/study/NCT03275389" }, { "nct_id": "NCT00510874", "title": "Study to Evaluate the Safety and Immune Response of Two-Doses of Candidate Influenza Vaccine GSK 1557484A in Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Pumarix™", "type": "BIOLOGICAL" }, { "name": "Pandemrix ™", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "18 Years to 64 Years" }, "enrollment_count": 780, "start_date": "2007-07-28", "completion_date": "2008-10-24", "has_results": true, "last_update_posted_date": "2018-08-17", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 7, "location_summary": "Huntsville, Alabama • Anaheim, California • Miami, Florida + 4 more", "locations": [ { "city": "Huntsville", "state": "Alabama" }, { "city": "Anaheim", "state": "California" }, { "city": "Miami", "state": "Florida" }, { "city": "Stockbridge", "state": "Georgia" }, { "city": "Lenexa", "state": "Kansas" } ], "official_url": "https://clinicaltrials.gov/study/NCT00510874" }, { "nct_id": "NCT05501561", "title": "Safety and Immunogenicity of Different Formulations of an MF59-Adjuvanted Influenza Vaccine in Older Adults ≥50 Years of Age", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "Experimental: IIV-A Investigational IIV-A administered as a single dose intramuscularly on Day 1", "type": "BIOLOGICAL" }, { "name": "Experimental: aIIV-B Investigational aIIV-B administered as a single dose intramuscularly on Day 1", "type": "BIOLOGICAL" }, { "name": "Experimental: aIIV-C Investigational aIIV-C administered as a single dose intramuscularly on Day 1", "type": "BIOLOGICAL" }, { "name": "Active Comparator: Licensed IIV IIV administered as a single dose intramuscularly on Day 1", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Seqirus", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "50 Years", "maximum_age": null, "sex": "ALL", "summary": "50 Years and older" }, "enrollment_count": 1056, "start_date": "2022-08-25", "completion_date": "2023-03-31", "has_results": true, "last_update_posted_date": "2026-06-30", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 47, "location_summary": "Tempe, Arizona • Huntington Beach, California • San Diego, California + 42 more", "locations": [ { "city": "Tempe", "state": "Arizona" }, { "city": "Huntington Beach", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "Colorado Springs", "state": "Colorado" }, { "city": "Milford", "state": "Connecticut" } ], "official_url": "https://clinicaltrials.gov/study/NCT05501561" }, { "nct_id": "NCT02214225", "title": "A Study to Evaluate the Immunogenicity and Safety of bioCSL Quadrivalent Influenza Vaccine (QIV) in Adults Aged 18 Years and Above.", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "Quadrivalent Influenza Vaccine (QIV)", "type": "BIOLOGICAL" }, { "name": "Trivalent Influenza Vaccine (TIV-1)", "type": "BIOLOGICAL" }, { "name": "Trivalent Influenza Vaccine (TIV-2)", "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": 3484, "start_date": "2014-08", "completion_date": "2015-04", "has_results": true, "last_update_posted_date": "2017-03-13", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 33, "location_summary": "Huntsville, Alabama • Los Angeles, California • San Diego, California + 29 more", "locations": [ { "city": "Huntsville", "state": "Alabama" }, { "city": "Los Angeles", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "Milford", "state": "Connecticut" }, { "city": "Jacksonville", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT02214225" }, { "nct_id": "NCT06695117", "title": "Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and High-Dose Inactivated Influenza Vaccine in Adult Participants 50 Years of Age and Older", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "COVID-19 Immunization", "Influenza Immunization" ], "interventions": [ { "name": "IIV-HD", "type": "BIOLOGICAL" }, { "name": "rC19 (dose 1)", "type": "BIOLOGICAL" }, { "name": "IIV-HD + rC19 (dose 1)", "type": "BIOLOGICAL" }, { "name": "IIV-HD + rC19 (dose 2)", "type": "BIOLOGICAL" }, { "name": "IIV-HD + rC19 (dose 3)", "type": "BIOLOGICAL" }, { "name": "IIV-HD + rC19 (dose 4)", "type": "BIOLOGICAL" }, { "name": "Placebo (0.9% NaCl)", "type": "OTHER" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "Sanofi", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "50 Years", "maximum_age": null, "sex": "ALL", "summary": "50 Years and older" }, "enrollment_count": 980, "start_date": "2024-11-19", "completion_date": "2026-04-16", "has_results": false, "last_update_posted_date": "2026-05-05", "last_synced_at": "2026-10-07T22:06:21.318Z", "location_count": 12, "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Tucson, Arizona + 9 more", "locations": [ { "city": "Birmingham", "state": "Alabama" }, { "city": "Huntsville", "state": "Alabama" }, { "city": "Tucson", "state": "Arizona" }, { "city": "The Villages", "state": "Florida" }, { "city": "Atlanta", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT06695117" } ] }