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Showing 1–24 of 68 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: H1N1 Influenza Virus Clear all
Completed Phase 2 Interventional Results available

H1N1 Vaccine at Two Dose Levels in HIV Positive Adults

NCT00992433
View directory record Official record
Conditions
Influenza
Interventions
Inactivated Influenza H1N1 vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
192 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
6
States / cities
Iowa City, Iowa • Baltimore, Maryland • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated May 15, 2012 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Immunologic Response to Inactivated Vaccine for Novel H1N1 Virus

NCT01023711
View directory record Official record
Conditions
Influenza
Interventions
Inactivated H1N1 vaccine
Biological
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
107 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 11, 2015 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Sanofi H1N1 Influenza Vaccine Administered at Different Dose Levels With and Without AS03 Adjuvant in Healthy Adult and Elderly Populations

NCT00963157
View directory record Official record
Conditions
Influenza
Interventions
AS03, Influenza Virus Vaccine, Monovalent A/H1N1 A/California/7/2009 NYMC X-179A
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
789 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
7
States / cities
Stanford, California • Decatur, Georgia • Iowa City, Iowa + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 23, 2014 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Results available

Comparing the Efficacy, Safety, and Tolerability of Combination Antivirals (Amantadine, Ribavirin, Oseltamivir) Versus Oseltamivir for the Treatment of Influenza in Adults at Risk for Complications

NCT01227967
View directory record Official record
Conditions
Influenza
Interventions
Amantadine, Ribavirin, Oseltamivir, Oseltamivir
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
881 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
69
States / cities
Birmingham, Alabama • Chandler, Arizona • Glendale, Arizona + 58 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study of Different Formulations of an Adjuvanted A/H1N1 Pandemic Vaccine in Healthy Adults and the Elderly

NCT00952276
View directory record Official record
Conditions
Influenza, Swine-origin A/H1N1 Influenza
Interventions
Monovalent Subvirion A/H1N1 influenza vaccine with adjuvant, Monovalent Subvirion A/H1N1 influenza vaccine, Normal saline solution
Biological
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
548 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
15
States / cities
Anaheim, California • Fountain Valley, California • South Miami, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2011 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1 Interventional

VRC 308: An Open-Label Phase I Study of the Safety and Immunogenicity of an Investigational H1 DNA Influenza Vaccine, VRC-FLUDNA057-00-VP, in Healthy Adults 18-70 Years Old

NCT00973895
View directory record Official record
Conditions
Influenza A Virus, H1N1 Subtype, Novel Swine-Origin
Interventions
VRC-FLUDNA057-00-VP
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Results available

Safety of and Immune Response to an H1N1 Influenza Virus Vaccine in HIV Infected Children and Youth

NCT00992836
View directory record Official record
Conditions
HIV Infections, H1N1 Influenza Virus
Interventions
Influenza A (H1N1) 2009 monovalent vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
4 Years to 25 Years
Enrollment
155 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
35
States / cities
Birmingham, Alabama • Alhambra, California • La Jolla, California + 25 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Jun 26, 2026, 11:42 AM EDT
Completed No phase listed Observational

Collection and Extraction of Respiratory Specimens

NCT01083511
View directory record Official record
Conditions
Influenza
Interventions
Not listed
Lead sponsor
QIAGEN Gaithersburg, Inc
Industry
Eligibility
Not listed
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
3
States / cities
Tucson, Arizona • Chapel Hill, North Carolina • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 13, 2014 · Synced Jun 26, 2026, 11:42 AM EDT
Terminated Phase 4 Interventional Results available

A Study of Tamiflu (Oseltamivir) for Treatment of Influenza With a Focus on (H1N1) 2009 Flu Strain

NCT01032837
View directory record Official record
Conditions
Influenza
Interventions
Oseltamivir, Placebo
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
1 Year and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
100
States / cities
Tuscaloosa, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 91 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2012 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety Study of an Oral Vaccine to Prevent Seasonal Influenza

NCT01688297
View directory record Official record
Conditions
Influenza
Interventions
VXA-A1.1 Oral Vaccine, VXA Placebo Tablet
Biological
Lead sponsor
Vaxart
Industry
Eligibility
18 Years to 49 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated May 11, 2017 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Influenza A 2009 H1N1 Challenge Study in Healthy Adults

NCT01646138
View directory record Official record
Conditions
Influenza
Interventions
Ca/04/2009/H1N1 Vero Grown Challenge Virus
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 8, 2016 · Synced Jun 26, 2026, 11:42 AM EDT
Completed No phase listed Observational

Laboratory Study of Licensed H1N1 Influenza Vaccines in HIV-1 Perinatally Infected Children and Youth

NCT01484522
View directory record Official record
Conditions
HIV-1 Infection, H1N1, Influenza, Flu
Interventions
FluMist, Fluvirin, Fluzone
Biological
Lead sponsor
International Maternal Pediatric Adolescent AIDS Clinical Trials Group
Network
Eligibility
6 Months to 25 Years
Enrollment
149 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
16
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 13 more
Source: ClinicalTrials.gov public record
Updated Dec 1, 2011 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of Three Dosage Levels of Swine Influenza Vaccine in Children Ages 3 to <9 Years, Adolescents 9 to <18 Years, Adults 18 to <65 Years and Elderly 65 Years and Older.

NCT01855945
View directory record Official record
Conditions
Prophylaxis of A/H3N2v Influenza
Interventions
Swine Influenza
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
3 Years to 92 Years
Enrollment
627 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
11
States / cities
Redding, California • Sacramento, California • Lenexa, Kansas + 8 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2016 · Synced Jun 26, 2026, 11:42 AM EDT
Completed No phase listed Observational

Novel Influenza A (H1N1) Surveillance Registry

NCT01046331
View directory record Official record
Conditions
Novel Influenza A, H1N1, Influenza
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
894 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
86
States / cities
Anchorage, Alaska • Phoenix, Arizona • Little Rock, Arkansas + 52 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Sanofi H1N1 + TIV - Adults and Elderly

NCT00943878
View directory record Official record
Conditions
Influenza
Interventions
Trivalent inactivated influenza vaccine, Inactivated H1N1 Vaccine, Placebo
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
805 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
5
States / cities
Decatur, Georgia • St Louis, Missouri • Cincinnati, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2012 · Synced Jun 26, 2026, 11:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Immunogenicity of Novel H1N1 Vaccination Among HIV-Infected Compared to HIV-Uninfected Persons

NCT00996970
View directory record Official record
Conditions
Influenza, HIV Infections
Interventions
Not listed
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years to 50 Years
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2022
U.S. locations
3
States / cities
San Diego, California • Bethesda, Maryland • Portsmouth, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

H1N1 Vaccine in Pregnant Women

NCT00963430
View directory record Official record
Conditions
Influenza
Interventions
Inactivated H1N1 Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 39 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
5
States / cities
St Louis, Missouri • Durham, North Carolina • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2012 · Synced Jun 26, 2026, 11:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Pilot Study for Collection of Anti-Influenza A Immune Plasma

NCT00984451
View directory record Official record
Conditions
Influenza A Virus Infection, Swine Flu
Interventions
Plasma collection following infection or vaccination with influenza A
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 60 Years · Male only
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2018
U.S. locations
12
States / cities
Los Angeles, California • Aurora, Colorado • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2019 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Evaluation of Anti-Hemagglutinin (Anti-HA) Antibodies as Protection From the Flu in Healthy People

NCT01971255
View directory record Official record
Conditions
Influenza
Interventions
Ca/04/2009/H1N1r Challenge Virus
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 23, 2017 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Sanofi H1N1 Influenza Vaccine Administered at Two Dose Levels in Adult and Elderly Populations

NCT00943631
View directory record Official record
Conditions
Influenza
Interventions
Inactivated H1N1 Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
406 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
3
States / cities
Baltimore, Maryland • Durham, North Carolina • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 30, 2012 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

H1N1v Virus Challenge Study in Healthy Subjects

NCT04044352
View directory record Official record
Conditions
Influenza
Interventions
Influenza A/Bethesda/MM2/H1N1 Challenge
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
4
States / cities
Baltimore, Maryland • St Louis, Missouri • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study of Different Formulations of an A/H1N1 Pandemic Vaccine in Healthy Adults and the Elderly

NCT00953524
View directory record Official record
Conditions
Influenza, Swine-origin A/H1N1 Influenza
Interventions
Monovalent Subvirion A/H1N1 Influenza vaccine (7.5 µg of HA), Monovalent Subvirion A/H1N1 Influenza vaccine (15 µg of HA), Monovalent Subvirion A/H1N1 Influenza vaccine (30 µg of HA), Normal saline solution (placebo)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
849 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
15
States / cities
Hoover, Alabama • Chandler, Arizona • Phoenix, Arizona + 12 more
Source: ClinicalTrials.gov public record
Updated Mar 9, 2014 · Synced Jun 26, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of H1N1 Vaccines in Adults Aged 18 Years and Older

NCT00985088
View directory record Official record
Conditions
Influenza
Interventions
GSK2340274A, GSK2340273A, Saline placebo
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
1,343 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
10
States / cities
Huntsville, Alabama • Jacksonville, Florida • Miami, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Dec 11, 2017 · Synced Jun 26, 2026, 11:42 AM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Effect of Age and Prior Immunity on Response to H1N1 Vaccines in Children

NCT01097941
View directory record Official record
Conditions
2009 H1N1 Influenza
Interventions
Live Attenuated H1N1 Influenza Vaccine, Influenza A (H1N1) 2009 Monovalent Vaccine, Influenza A (H1N1) 2009 Monovalent Vaccine/ Influenza A (H1N1) Monovalent Vaccine Live
Biological
Lead sponsor
University of Rochester
Other
Eligibility
4 Years to 9 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Sep 23, 2015 · Synced Jun 26, 2026, 11:42 AM EDT