{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Flublok+Quadrivalent", "query": { "intervention": "Flublok Quadrivalent" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 26, "total_pages": 3, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Flublok+Quadrivalent&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-15T22:03:57.921Z", "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": "NCT03658629", "title": "Phase 2 Dose and Formulation Confirmation of Quad-NIV in Older Adults", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "NanoFlu (Quad-NIV)", "type": "BIOLOGICAL" }, { "name": "Matrix-M Adjuvant", "type": "OTHER" }, { "name": "Placebo", "type": "OTHER" }, { "name": "Fluzone HD", "type": "BIOLOGICAL" }, { "name": "Flublok Quadrivalent", "type": "BIOLOGICAL" }, { "name": "Influenza Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "Novavax", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 1375, "start_date": "2018-09-24", "completion_date": "2019-04-26", "has_results": true, "last_update_posted_date": "2022-11-04", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 14, "location_summary": "Hollywood, Florida • Savannah, Georgia • Stockbridge, Georgia + 11 more", "locations": [ { "city": "Hollywood", "state": "Florida" }, { "city": "Savannah", "state": "Georgia" }, { "city": "Stockbridge", "state": "Georgia" }, { "city": "Rockville", "state": "Maryland" }, { "city": "Norfolk", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT03658629" }, { "nct_id": "NCT03617523", "title": "Safety and Immunogenicity of Fluzone® Quadrivalent, Flublok® Quadrivalent, and Fluzone® High-Dose, Influenza Vaccines, 2018-2019 Formulations", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Fluzone Quadrivalent vaccine, 2018-2019 formulation", "type": "BIOLOGICAL" }, { "name": "Flublok Quadrivalent vaccine, 2018-2019 formulation", "type": "BIOLOGICAL" }, { "name": "Fluzone High-Dose vaccine, 2018-2019 formulation", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Sanofi Pasteur, a Sanofi Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "6 Months", "maximum_age": null, "sex": "ALL", "summary": "6 Months and older" }, "enrollment_count": 240, "start_date": "2018-09-10", "completion_date": "2018-11-12", "has_results": true, "last_update_posted_date": "2022-03-29", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 3, "location_summary": "Bardstown, Kentucky • Metairie, Louisiana • Salt Lake City, Utah", "locations": [ { "city": "Bardstown", "state": "Kentucky" }, { "city": "Metairie", "state": "Louisiana" }, { "city": "Salt Lake City", "state": "Utah" } ], "official_url": "https://clinicaltrials.gov/study/NCT03617523" }, { "nct_id": "NCT05518500", "title": "A Deep Longitudinal Analysis of Next Generation Influenza Vaccines in Older Adults", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Aging", "Influenza Vaccine", "Dendritic Cell", "Vaccine Response" ], "interventions": [ { "name": "Flu Vaccine (Year 1)", "type": "BIOLOGICAL" }, { "name": "Flu Vaccine (Year 2)", "type": "BIOLOGICAL" }, { "name": "Flu Vaccine (Year 3)", "type": "BIOLOGICAL" }, { "name": "Flu Vaccine (Year 4)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "The Jackson Laboratory", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 75, "start_date": "2022-08-31", "completion_date": "2026-12-31", "has_results": false, "last_update_posted_date": "2026-08-03", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 1, "location_summary": "Farmington, Connecticut", "locations": [ { "city": "Farmington", "state": "Connecticut" } ], "official_url": "https://clinicaltrials.gov/study/NCT05518500" }, { "nct_id": "NCT05650554", "title": "Safety and Immunogenicity of Quadrivalent Influenza mRNA Vaccine MRT5413 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 MRT5413", "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": 682, "start_date": "2022-12-12", "completion_date": "2024-04-02", "has_results": false, "last_update_posted_date": "2025-03-19", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 28, "location_summary": "Chula Vista, California • Gardena, California • Long Beach, California + 24 more", "locations": [ { "city": "Chula Vista", "state": "California" }, { "city": "Gardena", "state": "California" }, { "city": "Long Beach", "state": "California" }, { "city": "North Hollywood", "state": "California" }, { "city": "San Diego", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT05650554" }, { "nct_id": "NCT03734237", "title": "A Pragmatic Assessment of Influenza Vaccine Effectiveness in the DoD", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza", "Influenza-like Illness", "Influenza Vaccines" ], "interventions": [ { "name": "Egg based influenza vaccines", "type": "BIOLOGICAL" }, { "name": "Recombinant influenza vaccines", "type": "BIOLOGICAL" }, { "name": "Cell-culture based influenza vaccines", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Henry M. Jackson Foundation for the Advancement of Military Medicine", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 15448, "start_date": "2018-11-06", "completion_date": "2026-06-30", "has_results": true, "last_update_posted_date": "2026-04-02", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 9, "location_summary": "San Diego, California • Annapolis, Maryland • Bethesda, Maryland + 5 more", "locations": [ { "city": "San Diego", "state": "California" }, { "city": "Annapolis", "state": "Maryland" }, { "city": "Bethesda", "state": "Maryland" }, { "city": "Bethesda", "state": "Maryland" }, { "city": "Fort Bragg", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT03734237" }, { "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": "2026-09-15T22:03:57.921Z", "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": "NCT06361875", "title": "A Study to Investigate the Safety and Immunogenicity of the Quadrivalent Influenza mRNA Vaccines in Adults Aged 18 Years and Above", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Influenza Immunization", "Healthy Volunteers" ], "interventions": [ { "name": "Quadrivalent Influenza mRNA Vaccine MRT5421", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza mRNA Vaccine MRT5424", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza mRNA Vaccine MRT5429", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza Standard Dose Vaccine", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Influenza High-Dose Vaccine", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Recombinant Influenza 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": 908, "start_date": "2024-04-01", "completion_date": "2025-06-09", "has_results": true, "last_update_posted_date": "2026-08-04", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 11, "location_summary": "San Diego, California • Hialeah, Florida • Hollywood, Florida + 8 more", "locations": [ { "city": "San Diego", "state": "California" }, { "city": "Hialeah", "state": "Florida" }, { "city": "Hollywood", "state": "Florida" }, { "city": "Indianapolis", "state": "Indiana" }, { "city": "Lexington", "state": "Kentucky" } ], "official_url": "https://clinicaltrials.gov/study/NCT06361875" }, { "nct_id": "NCT06015282", "title": "The Celljuvant Study: A Phase 3 Immunogenicity and Safety Study of aQIVc Vaccine in Adults Aged 50 Years and Older", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "Investigational aQIVc", "type": "BIOLOGICAL" }, { "name": "licensed QIVr", "type": "BIOLOGICAL" }, { "name": "licensed aQIV", "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": 7741, "start_date": "2023-11-03", "completion_date": "2025-01-30", "has_results": false, "last_update_posted_date": "2025-04-27", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 51, "location_summary": "Tempe, Arizona • Little Rock, Arkansas • Huntington Beach, California + 47 more", "locations": [ { "city": "Tempe", "state": "Arizona" }, { "city": "Little Rock", "state": "Arkansas" }, { "city": "Huntington Beach", "state": "California" }, { "city": "Redding", "state": "California" }, { "city": "Milford", "state": "Connecticut" } ], "official_url": "https://clinicaltrials.gov/study/NCT06015282" }, { "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": "2026-09-15T22:03:57.921Z", "location_count": 1, "location_summary": "Auburn, Maine", "locations": [ { "city": "Auburn", "state": "Maine" } ], "official_url": "https://clinicaltrials.gov/study/NCT01959945" }, { "nct_id": "NCT04460781", "title": "Surveillance Study to Assess the Safety of Flublok Quadrivalent (Influenza Vaccine) in Pregnant Women and Their Offspring", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flublok Quadrivalent influenza vaccine RIV4", "type": "BIOLOGICAL" }, { "name": "Standard-dose quadrivalent inactivated influenza vaccine SD-IIV4", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Sanofi Pasteur, a Sanofi Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": null, "maximum_age": "64 Years", "sex": "ALL", "summary": "Up to 64 Years" }, "enrollment_count": 96175, "start_date": "2018-09-17", "completion_date": "2022-02-28", "has_results": false, "last_update_posted_date": "2022-05-24", "last_synced_at": "2026-09-15T22:03:57.921Z", "location_count": 1, "location_summary": "Oakland, California", "locations": [ { "city": "Oakland", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT04460781" } ] }