Clinical trials
Phase 4 Influenza, Human trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
141 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2002 | 1 |
| 2003 | 2 |
| 2004 | 6 |
| 2005 | 4 |
| 2006 | 8 |
| 2007 | 5 |
| 2008 | 6 |
| 2009 | 8 |
| 2010 | 5 |
| 2011 | 5 |
| 2012 | 7 |
| 2013 | 7 |
| 2014 | 8 |
| 2015 | 7 |
| 2016 | 8 |
| 2017 | 9 |
| 2018 | 12 |
| 2019 | 9 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 114 |
| Terminated | 9 |
| Active, not recruiting | 6 |
| Recruiting | 4 |
| Unknown status | 4 |
| Withdrawn | 3 |
| Not yet recruiting | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Sanofi Pasteur, a Sanofi Company | 29 |
| MedImmune LLC | 12 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 11 |
| Stanford University | 10 |
| Duke University | 9 |
| Emory University | 5 |
| Insight Therapeutics, LLC | 5 |
| University of Pennsylvania | 4 |
| University of Rochester | 4 |
| Centers for Disease Control and Prevention | 3 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Influenza, Human | 141 |
| Orthomyxoviridae Infections | 4 |
| COVID-19 | 3 |
| Drug-Related Side Effects and Adverse Reactions | 3 |
| Injection Site Reaction | 3 |
| Fever | 2 |
| Pain | 2 |
| Respiratory Tract Infections | 2 |
| Virus Diseases | 2 |
| Arthritis, Rheumatoid | 1 |
Trials
Showing 1 to 25 of 141. Each trial links to its page on Pharma Observatory.
41 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.