Clinical trials
Observational Influenza, Human trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
115 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2003 | 1 |
| 2004 | 7 |
| 2005 | 2 |
| 2006 | 3 |
| 2007 | 4 |
| 2008 | 4 |
| 2009 | 12 |
| 2010 | 5 |
| 2011 | 8 |
| 2012 | 3 |
| 2013 | 4 |
| 2014 | 9 |
| 2015 | 8 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 7 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 2 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 79 |
| Recruiting | 10 |
| Terminated | 8 |
| Active, not recruiting | 6 |
| Unknown status | 5 |
| Withdrawn | 5 |
| Not yet recruiting | 1 |
| Enrolling by invitation | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Institute of Allergy and Infectious Diseases (NIAID) | 17 |
| University of Wisconsin, Madison | 6 |
| Henry M. Jackson Foundation for the Advancement of Military Medicine | 3 |
| MedImmune LLC | 3 |
| Pfizer | 3 |
| Sanofi Pasteur, a Sanofi Company | 3 |
| Seqirus | 3 |
| American Pharmacists Association Foundation | 2 |
| Boston Children's Hospital | 2 |
| Evidation Health | 2 |
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 | 115 |
| COVID-19 | 17 |
| Respiratory Tract Infections | 10 |
| Coronavirus Infections | 9 |
| Infections | 5 |
| Pneumonia | 5 |
| Orthomyxoviridae Infections | 4 |
| Respiratory Syncytial Virus Infections | 4 |
| Virus Diseases | 4 |
| Common Cold | 3 |
Trials
Showing 1 to 25 of 115. Each trial links to its page on Pharma Observatory.
15 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.