{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Comparator+Quadrivalent+Influenza+Virus+Vaccine", "query": { "intervention": "Comparator Quadrivalent Influenza Virus Vaccine" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 20, "total_pages": 2, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Comparator+Quadrivalent+Influenza+Virus+Vaccine&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-10-04T23:29:25.890Z", "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": "NCT03739112", "title": "Efficacy of a Plant-derived Quadrivalent Virus-like Particle (VLP) Vaccine in the Elderly", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Virus Diseases", "RNA Virus Infections", "Respiratory Tract Diseases", "Respiratory Tract Infections" ], "interventions": [ { "name": "Quadrivalent VLP Vaccine", "type": "BIOLOGICAL" }, { "name": "Fluarix Quadrivalent® Comparator Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Medicago", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 12794, "start_date": "2018-09-18", "completion_date": "2019-07-16", "has_results": true, "last_update_posted_date": "2023-06-23", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 50, "location_summary": "Mobile, Alabama • Tempe, Arizona • Banning, California + 42 more", "locations": [ { "city": "Mobile", "state": "Alabama" }, { "city": "Tempe", "state": "Arizona" }, { "city": "Banning", "state": "California" }, { "city": "Redding", "state": "California" }, { "city": "Sacramento", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03739112" }, { "nct_id": "NCT02307851", "title": "Quadrivalent Influenza VLP Vaccine Dose Ranging Study in Young Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Quadrivalent VLP Vaccine", "type": "BIOLOGICAL" }, { "name": "Comparator TIV", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Novavax", "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": 400, "start_date": "2014-11", "completion_date": "2015-06", "has_results": false, "last_update_posted_date": "2016-09-23", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 5, "location_summary": "Anaheim, California • Miami, Florida • Lenexa, Kansas + 2 more", "locations": [ { "city": "Anaheim", "state": "California" }, { "city": "Miami", "state": "Florida" }, { "city": "Lenexa", "state": "Kansas" }, { "city": "Omaha", "state": "Nebraska" }, { "city": "San Antonio", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT02307851" }, { "nct_id": "NCT04956575", "title": "A Study of mRNA-1010 Seasonal Influenza Vaccine in Healthy Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Seasonal Influenza" ], "interventions": [ { "name": "mRNA-1010", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "BIOLOGICAL" }, { "name": "Active Comparator", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "ModernaTX, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 885, "start_date": "2021-07-06", "completion_date": "2022-09-27", "has_results": true, "last_update_posted_date": "2023-10-27", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 21, "location_summary": "Phoenix, Arizona • Tempe, Arizona • Colton, California + 17 more", "locations": [ { "city": "Phoenix", "state": "Arizona" }, { "city": "Tempe", "state": "Arizona" }, { "city": "Colton", "state": "California" }, { "city": "Hollywood", "state": "Florida" }, { "city": "Savannah", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT04956575" }, { "nct_id": "NCT05945485", "title": "A Study to Evaluate the Safety and Immunogenicity of Two Doses of DCVC H1 HA mRNA-LNP in Healthy Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "DCVC H1 HA mRNA vaccine", "type": "BIOLOGICAL" }, { "name": "Quadrivalent Recombinant Seasonal Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Sodium Chloride, 0.9%", "type": "OTHER" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "49 Years", "sex": "ALL", "summary": "18 Years to 49 Years" }, "enrollment_count": 50, "start_date": "2023-10-16", "completion_date": "2026-05-21", "has_results": false, "last_update_posted_date": "2026-06-22", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 1, "location_summary": "Iowa City, Iowa", "locations": [ { "city": "Iowa City", "state": "Iowa" } ], "official_url": "https://clinicaltrials.gov/study/NCT05945485" }, { "nct_id": "NCT02500680", "title": "The Safety, Tolerance, and Immunogenicity of MAS-1-Adjuvanted Seasonal Inactivated Influenza Vaccine (MER4101)", "overall_status": "UNKNOWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "MER4101", "type": "BIOLOGICAL" }, { "name": "Inactivated Influenza Vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Nova Immunotherapeutics Limited", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 102, "start_date": "2015-07", "completion_date": "2020-12", "has_results": false, "last_update_posted_date": "2019-09-06", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 1, "location_summary": "St Louis, Missouri", "locations": [ { "city": "St Louis", "state": "Missouri" } ], "official_url": "https://clinicaltrials.gov/study/NCT02500680" }, { "nct_id": "NCT06431607", "title": "A Study to Find the Dose and Assess the Immune Response and Safety of a Vaccine Against Influenza in Healthy Younger and Older Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "F2G22B/DL001Z", "type": "BIOLOGICAL" }, { "name": "F2H23D/DL001Z-NH", "type": "BIOLOGICAL" }, { "name": "F2H23B/DL001Z-NH", "type": "BIOLOGICAL" }, { "name": "F2H23H/DL001Z", "type": "BIOLOGICAL" }, { "name": "FDQ23A-NH (Flu D-QIV)", "type": "COMBINATION_PRODUCT" }, { "name": "GSK5800544A", "type": "BIOLOGICAL" }, { "name": "Flu D-TIV", "type": "COMBINATION_PRODUCT" }, { "name": "F2H23A/DL001Z-NH", "type": "BIOLOGICAL" }, { "name": "F2H23G/DL001Z", "type": "BIOLOGICAL" }, { "name": "Fluzone HD Quadrivalent", "type": "COMBINATION_PRODUCT" }, { "name": "Fluzone HD", "type": "COMBINATION_PRODUCT" } ], "intervention_types": [ "BIOLOGICAL", "COMBINATION_PRODUCT" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "85 Years", "sex": "ALL", "summary": "18 Years to 85 Years" }, "enrollment_count": 845, "start_date": "2024-05-23", "completion_date": "2025-06-04", "has_results": true, "last_update_posted_date": "2026-03-10", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 18, "location_summary": "Hialeah, Florida • Miami, Florida • Chicago, Illinois + 14 more", "locations": [ { "city": "Hialeah", "state": "Florida" }, { "city": "Miami", "state": "Florida" }, { "city": "Miami", "state": "Florida" }, { "city": "Chicago", "state": "Illinois" }, { "city": "Valparaiso", "state": "Indiana" } ], "official_url": "https://clinicaltrials.gov/study/NCT06431607" }, { "nct_id": "NCT01964989", "title": "Clinical Study to Evaluate the Safety, Immunogenicity and Efficacy of Investigational Flu Vaccine Compared to Approved Flu Vaccine in Children.", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza Virus" ], "interventions": [ { "name": "Adjuvanted Quadrivalent Subunit Influenza Virus Vaccine (aQIV)", "type": "BIOLOGICAL" }, { "name": "Non-adjuvanted Trivalent Influenza Vaccine (TIV) / Quadrivalent Influenza Vaccine (QIV)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Seqirus", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "6 Months", "maximum_age": "71 Months", "sex": "ALL", "summary": "6 Months to 71 Months" }, "enrollment_count": 10644, "start_date": "2013-11", "completion_date": "2016-08", "has_results": true, "last_update_posted_date": "2023-03-27", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 91, "location_summary": "Chandler, Arizona • Harrisburg, Arkansas • Anaheim, California + 70 more", "locations": [ { "city": "Chandler", "state": "Arizona" }, { "city": "Harrisburg", "state": "Arkansas" }, { "city": "Anaheim", "state": "California" }, { "city": "Anaheim", "state": "California" }, { "city": "Baldwin Park", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT01964989" }, { "nct_id": "NCT05606965", "title": "A Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of mRNA-1010 in Healthy Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "mRNA-1010", "type": "BIOLOGICAL" }, { "name": "Egg-based Quadrivalent Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Adjuvanted Quadrivalent Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "Inactivated Influenza Vaccine", "type": "BIOLOGICAL" }, { "name": "mRNA-1345", "type": "BIOLOGICAL" }, { "name": "mRNA-1045", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "ModernaTX, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "80 Years", "sex": "ALL", "summary": "18 Years to 80 Years" }, "enrollment_count": 172, "start_date": "2022-11-02", "completion_date": "2025-11-13", "has_results": false, "last_update_posted_date": "2025-11-24", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 1, "location_summary": "St Louis, Missouri", "locations": [ { "city": "St Louis", "state": "Missouri" } ], "official_url": "https://clinicaltrials.gov/study/NCT05606965" }, { "nct_id": "NCT05755620", "title": "A Study to Evaluate the Safety and Immunogenicity of a Single Dose of H1ssF-3928 mRNA-LNP in Healthy Adults", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Influenza Virus Quadrivalent Inactivated Vaccine", "type": "BIOLOGICAL" }, { "name": "Sodium Chloride, 0.9%", "type": "OTHER" }, { "name": "VRC-FLUNPF099-00-VP (H1ssF_3928)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "49 Years", "sex": "ALL", "summary": "18 Years to 49 Years" }, "enrollment_count": 50, "start_date": "2023-04-05", "completion_date": "2025-10-03", "has_results": false, "last_update_posted_date": "2026-06-18", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 1, "location_summary": "Durham, North Carolina", "locations": [ { "city": "Durham", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT05755620" }, { "nct_id": "NCT04622592", "title": "Adjuvanted Seasonal Recombinant Quadrivalent Virus-Like Particles (QVLP) Influenza Vaccine in Adults 65 Years of Age and Older", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Instramuscular vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Medicago", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 209, "start_date": "2020-11-02", "completion_date": "2022-04-26", "has_results": true, "last_update_posted_date": "2023-07-21", "last_synced_at": "2026-10-04T23:29:25.890Z", "location_count": 14, "location_summary": "Huntsville, Alabama • Chandler, Arizona • San Diego, California + 11 more", "locations": [ { "city": "Huntsville", "state": "Alabama" }, { "city": "Chandler", "state": "Arizona" }, { "city": "San Diego", "state": "California" }, { "city": "Melbourne", "state": "Florida" }, { "city": "Orlando", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT04622592" } ] }