{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fluzone%C2%AE+High-Dose+Quadrivalent", "query": { "intervention": "Fluzone® High-Dose Quadrivalent" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 24, "total_pages": 3, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Fluzone%C2%AE+High-Dose+Quadrivalent&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-23T23:58:19.516Z", "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": "NCT02563093", "title": "Study of Fluzone® Quadrivalent, Fluzone® Intradermal Quadrivalent, and Fluzone® High-Dose, Influenza Vaccines in Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Fluzone Quadrivalent vaccine, 2015-2016 formulation, No Preservative", "type": "BIOLOGICAL" }, { "name": "Fluzone Intradermal Quadrivalent vaccine, 2015-2016 formulation", "type": "BIOLOGICAL" }, { "name": "Fluzone High-Dose vaccine, 2015-2016 formulation", "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": 208, "start_date": "2015-09", "completion_date": "2016-07", "has_results": true, "last_update_posted_date": "2016-12-12", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 4, "location_summary": "Santa Rosa, California • Council Bluffs, Iowa • Metairie, Louisiana + 1 more", "locations": [ { "city": "Santa Rosa", "state": "California" }, { "city": "Council Bluffs", "state": "Iowa" }, { "city": "Metairie", "state": "Louisiana" }, { "city": "Cincinnati", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT02563093" }, { "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": "2026-09-23T23:58:19.516Z", "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": "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": "2026-09-23T23:58:19.516Z", "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": "NCT03312699", "title": "Effects of Aging on Primary and Secondary Vaccine Responses", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza", "Hepatitis A", "Typhoid", "Healthy Adults" ], "interventions": [ { "name": "Fluzone® quadrivalent", "type": "BIOLOGICAL" }, { "name": "Fluzone High Dose", "type": "BIOLOGICAL" }, { "name": "Fluad", "type": "BIOLOGICAL" }, { "name": "Vaqta", "type": "BIOLOGICAL" }, { "name": "Typhim Vi", "type": "BIOLOGICAL" }, { "name": "Vivotif", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Stanford University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 54, "start_date": "2017-09-19", "completion_date": "2023-12-31", "has_results": false, "last_update_posted_date": "2024-12-16", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 1, "location_summary": "Stanford, California", "locations": [ { "city": "Stanford", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03312699" }, { "nct_id": "NCT01946438", "title": "Study of Fluzone® Quadrivalent, Fluzone® Intradermal, and Fluzone® High-Dose Influenza Virus Vaccines in Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Fluzone® Quadrivalent, Influenza Virus Vaccine (2013-2014 formulation),", "type": "BIOLOGICAL" }, { "name": "Fluzone® Intradermal, Influenza Virus Vaccine (2013-2014 formulation),", "type": "BIOLOGICAL" }, { "name": "Fluzone® High-Dose, Influenza Virus Vaccine (2013-2014 formulation)", "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": 208, "start_date": "2013-09", "completion_date": "2014-07", "has_results": true, "last_update_posted_date": "2014-09-25", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 4, "location_summary": "Santa Rosa, California • Council Bluffs, Iowa • Metairie, Louisiana + 1 more", "locations": [ { "city": "Santa Rosa", "state": "California" }, { "city": "Council Bluffs", "state": "Iowa" }, { "city": "Metairie", "state": "Louisiana" }, { "city": "Cincinnati", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT01946438" }, { "nct_id": "NCT04551677", "title": "Annual Study for Collection of Serum Samples in Children and Older Adults Receiving the 2020-2021 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza Immunization", "Healthy Volunteers" ], "interventions": [ { "name": "Fluzone Quadrivalent vaccine, No Preservative (0.5-mL dose), 2020-2021 formulation", "type": "BIOLOGICAL" }, { "name": "Fluzone High-Dose Quadrivalent vaccine (0.7-mL dose), 2020-2021 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": "84 Years", "sex": "ALL", "summary": "6 Months to 84 Years" }, "enrollment_count": 90, "start_date": "2020-09-16", "completion_date": "2020-12-18", "has_results": true, "last_update_posted_date": "2025-09-12", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 2, "location_summary": "Bardstown, Kentucky • Salt Lake City, Utah", "locations": [ { "city": "Bardstown", "state": "Kentucky" }, { "city": "Salt Lake City", "state": "Utah" } ], "official_url": "https://clinicaltrials.gov/study/NCT04551677" }, { "nct_id": "NCT05947071", "title": "High vs.Standard Dose Influenza Vaccine in Pediatric Solid Organ Transplant (SOT) Recipients", "overall_status": "RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Immunization; Infection", "Transplantation Infection", "Influenza" ], "interventions": [ { "name": "Standard Dose Quadrivalent Inactivated Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "High Dose Quadrivalent Inactivated Influenza Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": false, "eligibility": { "minimum_age": "3 Years", "maximum_age": "17 Years", "sex": "ALL", "summary": "3 Years to 17 Years" }, "enrollment_count": 312, "start_date": "2024-09-26", "completion_date": "2027-09-01", "has_results": false, "last_update_posted_date": "2026-04-21", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 8, "location_summary": "Stanford, California • Atlanta, Georgia • Chicago, Illinois + 5 more", "locations": [ { "city": "Stanford", "state": "California" }, { "city": "Atlanta", "state": "Georgia" }, { "city": "Chicago", "state": "Illinois" }, { "city": "Kansas City", "state": "Missouri" }, { "city": "Cincinnati", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT05947071" }, { "nct_id": "NCT04969276", "title": "Study of a Quadrivalent High-Dose Influenza Vaccine and a Moderna COVID-19 Vaccine Administered Either Concomitantly or Singly in Participants 65 Years of Age and Older Previously Vaccinated With a 2-dose Schedule of Moderna COVID-19 Vaccine", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza Immunization", "Healthy Volunteers" ], "interventions": [ { "name": "Quadrivalent Inactivated Influenza High Dose", "type": "BIOLOGICAL" }, { "name": "COVID-19 mRNA Vaccine (nucleoside modified)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Sanofi Pasteur, a Sanofi Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 306, "start_date": "2021-07-16", "completion_date": "2022-02-08", "has_results": true, "last_update_posted_date": "2025-09-12", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 6, "location_summary": "Glendale, Arizona • San Diego, California • Vista, California + 3 more", "locations": [ { "city": "Glendale", "state": "Arizona" }, { "city": "San Diego", "state": "California" }, { "city": "Vista", "state": "California" }, { "city": "Centennial", "state": "Colorado" }, { "city": "Peoria", "state": "Illinois" } ], "official_url": "https://clinicaltrials.gov/study/NCT04969276" }, { "nct_id": "NCT03722589", "title": "Immunogenicity Trial of Egg- Versus Non-Egg-Based Influenza Vaccines Among HCP", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flublok", "type": "BIOLOGICAL" }, { "name": "Flucelvax", "type": "BIOLOGICAL" }, { "name": "Fluarix", "type": "BIOLOGICAL" }, { "name": "Fluzone", "type": "BIOLOGICAL" }, { "name": "Fluzone High-Dose", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Centers for Disease Control and Prevention", "sponsor_class": "FED", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 944, "start_date": "2018-09-12", "completion_date": "2020-07-31", "has_results": true, "last_update_posted_date": "2024-07-22", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 2, "location_summary": "Portland, Oregon • Temple, Texas", "locations": [ { "city": "Portland", "state": "Oregon" }, { "city": "Temple", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT03722589" }, { "nct_id": "NCT05215327", "title": "High vs. Standard Dose Influenza Vaccine in Lung Allograft Recipients", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Immunization; Infection", "Transplantation Infection", "Influenza" ], "interventions": [ { "name": "High Dose Quadrivalent Inactivated Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Standard Dose Quadrivalent Inactivated Influenza Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Vanderbilt University Medical Center", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "16 Years", "maximum_age": null, "sex": "ALL", "summary": "16 Years and older" }, "enrollment_count": 270, "start_date": "2022-11-08", "completion_date": "2027-12-31", "has_results": false, "last_update_posted_date": "2026-09-04", "last_synced_at": "2026-09-23T23:58:19.516Z", "location_count": 1, "location_summary": "Nashville, Tennessee", "locations": [ { "city": "Nashville", "state": "Tennessee" } ], "official_url": "https://clinicaltrials.gov/study/NCT05215327" } ] }