{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Influenza+Vaccine%2C+recombinant+Hemagglutinin&page=3", "query": { "intervention": "Influenza Vaccine, recombinant Hemagglutinin", "page": 3 }, "page_size": 10 }, "pagination": { "page": 3, "page_size": 10, "total_count": 55, "total_pages": 6, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Influenza+Vaccine%2C+recombinant+Hemagglutinin&page=4&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Influenza+Vaccine%2C+recombinant+Hemagglutinin&page=2&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-13T22:08:41.939Z", "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": "NCT00539864", "title": "Safety and Reactogenicity of FluBlok and Comparison of Immunogenicity, Efficacy and Effectiveness Against TIV", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "FluBlok Influenza Vaccination", "type": "BIOLOGICAL" }, { "name": "TIV (Fluzone) Influenza Vaccination", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Protein Sciences Corporation", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "50 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "50 Years to 64 Years" }, "enrollment_count": 602, "start_date": "2007-09", "completion_date": "2008-04", "has_results": true, "last_update_posted_date": "2011-07-27", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 5, "location_summary": "Fresno, California • Hayward, California • Roseville, California + 2 more", "locations": [ { "city": "Fresno", "state": "California" }, { "city": "Hayward", "state": "California" }, { "city": "Roseville", "state": "California" }, { "city": "Sacramento", "state": "California" }, { "city": "Honolulu", "state": "Hawaii" } ], "official_url": "https://clinicaltrials.gov/study/NCT00539864" }, { "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": "2026-10-13T22:08:41.939Z", "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": "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": "2026-10-13T22:08:41.939Z", "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": "NCT06518577", "title": "Immunogenicity of Influenza Vaccinations", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flucelvax® (ccIIV3)", "type": "BIOLOGICAL" }, { "name": "Flublok® (RIV3)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Duke University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "18 Years to 64 Years" }, "enrollment_count": 606, "start_date": "2024-09-09", "completion_date": "2025-06-04", "has_results": true, "last_update_posted_date": "2026-07-28", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 7, "location_summary": "Phoenix, Arizona • Tempe, Arizona • Atlanta, Georgia + 3 more", "locations": [ { "city": "Phoenix", "state": "Arizona" }, { "city": "Tempe", "state": "Arizona" }, { "city": "Atlanta", "state": "Georgia" }, { "city": "St Louis", "state": "Missouri" }, { "city": "Cleveland", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT06518577" }, { "nct_id": "NCT01498718", "title": "Seasonal Influenza DNA Vaccine Prime With Trivalent Inactivated Vaccine (TIV) Boost Compared to TIV Alone", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "DNA vaccine", "type": "BIOLOGICAL" }, { "name": "TIV", "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": "70 Years", "sex": "ALL", "summary": "18 Years to 70 Years" }, "enrollment_count": 131, "start_date": "2011-12", "completion_date": "2013-04", "has_results": false, "last_update_posted_date": "2016-03-24", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 4, "location_summary": "Decatur, Georgia • St Louis, Missouri • Cincinnati, Ohio + 1 more", "locations": [ { "city": "Decatur", "state": "Georgia" }, { "city": "St Louis", "state": "Missouri" }, { "city": "Cincinnati", "state": "Ohio" }, { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01498718" }, { "nct_id": "NCT01147068", "title": "Safety and Immunogenicity of PanBlok Influenza Vaccine in Healthy Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "0.5mL Intramuscular Injection", "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": 392, "start_date": "2010-06", "completion_date": "2011-10", "has_results": true, "last_update_posted_date": "2012-11-26", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 4, "location_summary": "Overland Park, Kansas • Omaha, Nebraska • Rochester, New York + 1 more", "locations": [ { "city": "Overland Park", "state": "Kansas" }, { "city": "Omaha", "state": "Nebraska" }, { "city": "Rochester", "state": "New York" }, { "city": "Fort Worth", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01147068" }, { "nct_id": "NCT00395174", "title": "Comparison of the Immunogenicity, Safety and Reactogenicity of FluBlok, To a Licensed Vaccine In Elderly Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Influenza Vaccination", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Protein Sciences Corporation", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 870, "start_date": "2006-10", "completion_date": "2007-05", "has_results": false, "last_update_posted_date": "2009-12-17", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 7, "location_summary": "Baltimore, Maryland • Rochester, Minnesota • Shrewsbury, New Jersey + 3 more", "locations": [ { "city": "Baltimore", "state": "Maryland" }, { "city": "Baltimore", "state": "Maryland" }, { "city": "Rochester", "state": "Minnesota" }, { "city": "Shrewsbury", "state": "New Jersey" }, { "city": "Rochester", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT00395174" }, { "nct_id": "NCT02600585", "title": "Post-Marketing Observational Study of Safety Following Vaccination With Flublok® Compared to Licensed IIV in Adults", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Human Influenza" ], "interventions": [ { "name": "Recombinant Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Inactivated Influenza Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Protein Sciences Corporation", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 254648, "start_date": "2015-11", "completion_date": "2016-09", "has_results": false, "last_update_posted_date": "2017-10-12", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 1, "location_summary": "Oakland, California", "locations": [ { "city": "Oakland", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02600585" }, { "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": "2026-10-13T22:08:41.939Z", "location_count": 1, "location_summary": "Farmington, Connecticut", "locations": [ { "city": "Farmington", "state": "Connecticut" } ], "official_url": "https://clinicaltrials.gov/study/NCT05518500" }, { "nct_id": "NCT00307177", "title": "Trivalent Baculovirus-expressed Influenza HA Vaccine in Adults With Non-Hodgkin's B-cell Lymphoma", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Trivalent inactivated influenza vaccine", "type": "BIOLOGICAL" }, { "name": "Trivalent Baculovirus-expressed Influenza HA vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 28, "start_date": "2004-08", "completion_date": "2005-04", "has_results": false, "last_update_posted_date": "2014-12-05", "last_synced_at": "2026-10-13T22:08:41.939Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT00307177" } ] }