{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+Inactivated+Influenza+Vaccine", "query": { "intervention": "Seasonal Inactivated Influenza Vaccine" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 66, "total_pages": 7, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Seasonal+Inactivated+Influenza+Vaccine&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-10-01T16:01:57.093Z", "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": "NCT00782431", "title": "Immunogenicity and Safety Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) in Adults Aged 50 Years and Older", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Vero cell derived, trivalent, seasonal influenza vaccine", "type": "BIOLOGICAL" }, { "name": "Licensed egg-derived, trivalent seasonal influenza vaccine", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Alachua Government Services, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "50 Years", "maximum_age": null, "sex": "ALL", "summary": "50 Years and older" }, "enrollment_count": 3208, "start_date": "2008-11", "completion_date": "2009-07", "has_results": true, "last_update_posted_date": "2026-01-02", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 30, "location_summary": "Mobile, Alabama • Tucson, Arizona • Sacramento, California + 25 more", "locations": [ { "city": "Mobile", "state": "Alabama" }, { "city": "Tucson", "state": "Arizona" }, { "city": "Sacramento", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "San Francisco", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00782431" }, { "nct_id": "NCT00566345", "title": "Efficacy Study of an Investigational Influenza Vaccine (Vero Cell Derived) to Prevent Culture Confirmed Influenza Infection (CCII)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Inactivated seasonal influenza vaccine (split virus, Vero cell-derived)", "type": "BIOLOGICAL" }, { "name": "Phosphate buffered saline", "type": "OTHER" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "Alachua Government Services, Inc.", "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": 3670, "start_date": "2007-11", "completion_date": "2008-06", "has_results": true, "last_update_posted_date": "2023-10-17", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 34, "location_summary": "Tucson, Arizona • Anaheim, California • Sacramento, California + 31 more", "locations": [ { "city": "Tucson", "state": "Arizona" }, { "city": "Anaheim", "state": "California" }, { "city": "Sacramento", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "San Francisco", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00566345" }, { "nct_id": "NCT02559505", "title": "Influenza Immunity in Children", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Seasonal IIV 0.25 mL dose", "type": "BIOLOGICAL" }, { "name": "Natural influenza infection", "type": "OTHER" }, { "name": "Seasonal IIV 0.5 mL dose", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL", "OTHER" ], "sponsor": "University of Rochester", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "3 Months", "maximum_age": "8 Years", "sex": "ALL", "summary": "3 Months to 8 Years" }, "enrollment_count": 134, "start_date": "2015-10", "completion_date": "2020-07-03", "has_results": true, "last_update_posted_date": "2021-09-02", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 1, "location_summary": "Rochester, New York", "locations": [ { "city": "Rochester", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT02559505" }, { "nct_id": "NCT01609998", "title": "Seasonal Influenza DNA Vaccine & Seasonal Influenza Trivalent Inactivated Vaccine (TIV) in Children & Adolescents", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Seasonal Influenza 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": "6 Years", "maximum_age": "17 Years", "sex": "ALL", "summary": "6 Years to 17 Years" }, "enrollment_count": 75, "start_date": "2012-06", "completion_date": "2013-07", "has_results": false, "last_update_posted_date": "2018-12-06", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 5, "location_summary": "Atlanta, Georgia • St Louis, Missouri • Lebanon, New Hampshire + 2 more", "locations": [ { "city": "Atlanta", "state": "Georgia" }, { "city": "St Louis", "state": "Missouri" }, { "city": "Lebanon", "state": "New Hampshire" }, { "city": "Cincinnati", "state": "Ohio" }, { "city": "Nashville", "state": "Tennessee" } ], "official_url": "https://clinicaltrials.gov/study/NCT01609998" }, { "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": "2026-10-01T16:01:57.093Z", "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": "NCT04101838", "title": "B Cell and Antibody Response to Seasonal Influenza Vaccines in Younger and Older Adults", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Fluzone", "type": "DRUG" }, { "name": "Flucelvax", "type": "DRUG" }, { "name": "Fluzone High-Dose", "type": "DRUG" }, { "name": "Fluad", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "University of Alabama at Birmingham", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "80 Years", "sex": "ALL", "summary": "18 Years to 80 Years" }, "enrollment_count": 50, "start_date": "2021-04-01", "completion_date": "2027-05", "has_results": false, "last_update_posted_date": "2026-05-14", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 1, "location_summary": "Birmingham, Alabama", "locations": [ { "city": "Birmingham", "state": "Alabama" } ], "official_url": "https://clinicaltrials.gov/study/NCT04101838" }, { "nct_id": "NCT02545543", "title": "A Study to Evaluate the Immunogenicity and Safety of Seqirus Quadrivalent Influenza Vaccine (QIV) in a Pediatric Population 5 Through 17 Years of Age", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza, Human" ], "interventions": [ { "name": "Seqirus QIV", "type": "BIOLOGICAL" }, { "name": "Comparator QIV", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Seqirus", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "5 Years", "maximum_age": "17 Years", "sex": "ALL", "summary": "5 Years to 17 Years" }, "enrollment_count": 2278, "start_date": "2015-09", "completion_date": "2016-06", "has_results": true, "last_update_posted_date": "2018-05-23", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 32, "location_summary": "Huntsville, Alabama • Madera, California • Ontario, California + 29 more", "locations": [ { "city": "Huntsville", "state": "Alabama" }, { "city": "Madera", "state": "California" }, { "city": "Ontario", "state": "California" }, { "city": "Redding", "state": "California" }, { "city": "Sacramento", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02545543" }, { "nct_id": "NCT02148211", "title": "Fluarix/ FluLaval/ Fluarix Quadrivalent/ FluLaval Quadrivalent Vaccine Pregnancy Registry", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Influenza" ], "interventions": [ { "name": "Data collection", "type": "OTHER" } ], "intervention_types": [ "OTHER" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": null, "maximum_age": null, "sex": "FEMALE", "summary": "Female only" }, "enrollment_count": 507, "start_date": "2014-06-01", "completion_date": "2019-05-31", "has_results": true, "last_update_posted_date": "2020-06-12", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 1, "location_summary": "Wilmington, North Carolina", "locations": [ { "city": "Wilmington", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT02148211" }, { "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": "2026-10-01T16:01:57.093Z", "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": "NCT00800605", "title": "Immunogenicity Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) to Prevent Culture Confirmed Influenza Infection", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Influenza" ], "interventions": [ { "name": "Vero cell-derived, trivalent, seasonal influenza vaccine", "type": "BIOLOGICAL" }, { "name": "Placebo: Phosphate-buffered saline", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Alachua Government Services, Inc.", "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": 7250, "start_date": "2008-12", "completion_date": "2009-06", "has_results": true, "last_update_posted_date": "2025-11-24", "last_synced_at": "2026-10-01T16:01:57.093Z", "location_count": 36, "location_summary": "Tucson, Arizona • Sacramento, California • San Diego, California + 31 more", "locations": [ { "city": "Tucson", "state": "Arizona" }, { "city": "Sacramento", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "San Francisco", "state": "California" }, { "city": "Denver", "state": "Colorado" } ], "official_url": "https://clinicaltrials.gov/study/NCT00800605" } ] }