Clinical trials
Influenza, Human trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
911 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 2 |
| 2001 | 4 |
| 2002 | 2 |
| 2003 | 3 |
| 2004 | 24 |
| 2005 | 33 |
| 2006 | 35 |
| 2007 | 41 |
| 2008 | 46 |
| 2009 | 76 |
| 2010 | 56 |
| 2011 | 42 |
| 2012 | 42 |
| 2013 | 52 |
| 2014 | 45 |
| 2015 | 30 |
| 2016 | 31 |
| 2017 | 38 |
| 2018 | 36 |
| 2019 | 31 |
| 2020 | 26 |
| 2021 | 31 |
| 2022 | 52 |
| 2023 | 40 |
| 2024 | 34 |
| 2025 | 26 |
| 2026 | 22 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 749 |
| Terminated | 45 |
| Recruiting | 42 |
| Active, not recruiting | 23 |
| Unknown status | 20 |
| Withdrawn | 19 |
| Not yet recruiting | 6 |
| Enrolling by invitation | 5 |
| Suspended | 2 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Institute of Allergy and Infectious Diseases (NIAID) | 164 |
| Sanofi Pasteur, a Sanofi Company | 66 |
| GlaxoSmithKline | 57 |
| MedImmune LLC | 31 |
| Seqirus | 26 |
| ModernaTX, Inc. | 19 |
| Stanford University | 18 |
| Emory University | 15 |
| Hoffmann-La Roche | 14 |
| Novartis Vaccines | 13 |
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 | 911 |
| Virus Diseases | 51 |
| Influenza in Birds | 50 |
| COVID-19 | 48 |
| Respiratory Tract Infections | 39 |
| Orthomyxoviridae Infections | 31 |
| Infections | 23 |
| Coronavirus Infections | 17 |
| Pneumonia | 14 |
| Common Cold | 13 |
Trials
Showing 26 to 50 of 911. Each trial links to its page on Pharma Observatory.
811 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
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.