Clinical trials
Phase 4 Influenza, Human trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
342 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2002 | 2 |
| 2003 | 4 |
| 2004 | 7 |
| 2005 | 7 |
| 2006 | 12 |
| 2007 | 10 |
| 2008 | 13 |
| 2009 | 32 |
| 2010 | 28 |
| 2011 | 21 |
| 2012 | 22 |
| 2013 | 24 |
| 2014 | 17 |
| 2015 | 16 |
| 2016 | 15 |
| 2017 | 15 |
| 2018 | 15 |
| 2019 | 13 |
| 2020 | 7 |
| 2021 | 18 |
| 2022 | 6 |
| 2023 | 10 |
| 2024 | 9 |
| 2025 | 9 |
| 2026 | 8 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 266 |
| Unknown status | 29 |
| Terminated | 15 |
| Active, not recruiting | 13 |
| Recruiting | 8 |
| Not yet recruiting | 5 |
| Withdrawn | 4 |
| Suspended | 1 |
| Enrolling by invitation | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Sanofi Pasteur, a Sanofi Company | 32 |
| Stanford University | 20 |
| GlaxoSmithKline | 12 |
| MedImmune LLC | 12 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 11 |
| Sinovac Biotech Co., Ltd | 10 |
| Duke University | 9 |
| Seqirus | 9 |
| McMaster University | 8 |
| Jiangsu Province Centers for Disease Control and Prevention | 7 |
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 | 342 |
| Respiratory Tract Infections | 10 |
| Orthomyxoviridae Infections | 9 |
| COVID-19 | 7 |
| Virus Diseases | 7 |
| Pneumonia | 6 |
| Heart Failure | 5 |
| Common Cold | 4 |
| HIV Infections | 4 |
| Infections | 4 |
Trials
Showing 26 to 50 of 342. Each trial links to its page on Pharma Observatory.
242 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.
Go deeper on Pharma Observatory
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