{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Inactivated+Influenza+Vaccine+%28IIV4%29&page=2", "query": { "intervention": "Inactivated Influenza Vaccine (IIV4)", "page": 2 }, "page_size": 10 }, "pagination": { "page": 2, "page_size": 10, "total_count": 25, "total_pages": 3, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Inactivated+Influenza+Vaccine+%28IIV4%29&page=3&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Inactivated+Influenza+Vaccine+%28IIV4%29&page=1&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-07T00:43:18.339Z", "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": "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": "2026-10-07T00:43:18.339Z", "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": "NCT03598439", "title": "Randomized Influenza Vaccine Evaluation of Immune Response", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Standard IIV4", "type": "BIOLOGICAL" }, { "name": "Recombinant", "type": "BIOLOGICAL" }, { "name": "Cell-culture", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Marshfield Clinic Research Foundation", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "18 Years to 64 Years" }, "enrollment_count": 366, "start_date": "2018-07-30", "completion_date": "2024-07-09", "has_results": false, "last_update_posted_date": "2025-11-21", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 1, "location_summary": "Marshfield, Wisconsin", "locations": [ { "city": "Marshfield", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT03598439" }, { "nct_id": "NCT03165981", "title": "Fever After Simultaneous Versus Sequential Vaccination in Young Children", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Fever After Vaccination", "Fever", "Febrile Seizure" ], "interventions": [ { "name": "PCV13", "type": "BIOLOGICAL" }, { "name": "DTaP", "type": "BIOLOGICAL" }, { "name": "IIV", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Duke University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "12 Months", "maximum_age": "16 Months", "sex": "ALL", "summary": "12 Months to 16 Months" }, "enrollment_count": 221, "start_date": "2017-08-25", "completion_date": "2018-01-15", "has_results": true, "last_update_posted_date": "2024-11-18", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 3, "location_summary": "Oakland, California • Atlanta, Georgia • Durham, North Carolina", "locations": [ { "city": "Oakland", "state": "California" }, { "city": "Atlanta", "state": "Georgia" }, { "city": "Durham", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT03165981" }, { "nct_id": "NCT03318315", "title": "Co-Administration of AS03 Adjuvanted A/H7N9 IIV With IIV4", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Avian Influenza", "Influenza", "Influenza Immunisation" ], "interventions": [ { "name": "AS03", "type": "DRUG" }, { "name": "Inactivated influenza H7N9 vaccine", "type": "BIOLOGICAL" }, { "name": "Influenza Virus Quadrivalent Inactivated Vaccine", "type": "BIOLOGICAL" }, { "name": "Phosphate Buffered Saline (PBS) diluent", "type": "OTHER" } ], "intervention_types": [ "DRUG", "BIOLOGICAL", "OTHER" ], "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "19 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "19 Years to 64 Years" }, "enrollment_count": 149, "start_date": "2018-02-20", "completion_date": "2019-07-25", "has_results": true, "last_update_posted_date": "2020-08-06", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 4, "location_summary": "Birmingham, Alabama • Baltimore, Maryland • Cincinnati, Ohio + 1 more", "locations": [ { "city": "Birmingham", "state": "Alabama" }, { "city": "Baltimore", "state": "Maryland" }, { "city": "Cincinnati", "state": "Ohio" }, { "city": "Nashville", "state": "Tennessee" } ], "official_url": "https://clinicaltrials.gov/study/NCT03318315" }, { "nct_id": "NCT06029933", "title": "Fluad vs. Fluzone High-Dose Vaccine Effectiveness Among Adults ≥65 Years", "overall_status": "RECRUITING", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Influenza", "Community-acquired Pneumonia", "Cardiovascular Events" ], "interventions": [ { "name": "Adjuvanted Quadrivalent Inactivated Influenza Vaccine (aIIV4)", "type": "BIOLOGICAL" }, { "name": "High-Dose Quadrivalent Inactivated Influenza Vaccine (HD-IIV4)", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Kaiser Permanente", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "65 Years", "maximum_age": null, "sex": "ALL", "summary": "65 Years and older" }, "enrollment_count": 1500000, "start_date": "2023-08-17", "completion_date": "2028-05", "has_results": false, "last_update_posted_date": "2026-08-05", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 1, "location_summary": "Oakland, California", "locations": [ { "city": "Oakland", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT06029933" }, { "nct_id": "NCT03058692", "title": "Two Doses of Multimeric-001 (M-001) Followed by Influenza Vaccine", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Influenza", "Influenza Immunisation" ], "interventions": [ { "name": "Influenza Multimeric-001 Vaccine", "type": "BIOLOGICAL" }, { "name": "Placebo", "type": "OTHER" }, { "name": "Quadrivalent Recombinant Seasonal Influenza Vaccine", "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": 120, "start_date": "2018-04-09", "completion_date": "2019-01-14", "has_results": true, "last_update_posted_date": "2020-06-18", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 3, "location_summary": "Iowa City, Iowa • Cincinnati, Ohio • Houston, Texas", "locations": [ { "city": "Iowa City", "state": "Iowa" }, { "city": "Cincinnati", "state": "Ohio" }, { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT03058692" }, { "nct_id": "NCT02285998", "title": "Protective Efficacy of Flublok® Quadrivalent Versus Licensed Inactivated Influenza Vaccine in Adults ≥50 Years of Age", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Flublok Quadrivalent 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": "50 Years", "maximum_age": null, "sex": "ALL", "summary": "50 Years and older" }, "enrollment_count": 9003, "start_date": "2014-10", "completion_date": "2015-05", "has_results": true, "last_update_posted_date": "2017-10-27", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 38, "location_summary": "Mobile, Alabama • Tempe, Arizona • Little Rock, Arkansas + 34 more", "locations": [ { "city": "Mobile", "state": "Alabama" }, { "city": "Tempe", "state": "Arizona" }, { "city": "Little Rock", "state": "Arkansas" }, { "city": "Redding", "state": "California" }, { "city": "Sacramento", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02285998" }, { "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": "2026-10-07T00:43:18.339Z", "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": "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": "2026-10-07T00:43:18.339Z", "location_count": 1, "location_summary": "Iowa City, Iowa", "locations": [ { "city": "Iowa City", "state": "Iowa" } ], "official_url": "https://clinicaltrials.gov/study/NCT05945485" }, { "nct_id": "NCT03028987", "title": "Adaptive Immune Responses and Repertoire in Influenza Vaccination and Infection (SLVP031)", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Fluzone®", "type": "BIOLOGICAL" }, { "name": "FluMist®", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Stanford University", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "49 Years", "sex": "ALL", "summary": "18 Years to 49 Years" }, "enrollment_count": 10, "start_date": "2014-11-19", "completion_date": "2015-11-18", "has_results": true, "last_update_posted_date": "2017-09-12", "last_synced_at": "2026-10-07T00:43:18.339Z", "location_count": 1, "location_summary": "Stanford, California", "locations": [ { "city": "Stanford", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03028987" } ] }