Clinical trials
Observational COVID-19 trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
3,111 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2009 | 1 |
| 2011 | 3 |
| 2013 | 2 |
| 2014 | 5 |
| 2015 | 2 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 7 |
| 2019 | 31 |
| 2020 | 1,668 |
| 2021 | 804 |
| 2022 | 349 |
| 2023 | 136 |
| 2024 | 53 |
| 2025 | 23 |
| 2026 | 11 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 1,841 |
| Unknown status | 931 |
| Recruiting | 98 |
| Active, not recruiting | 85 |
| Terminated | 73 |
| Withdrawn | 63 |
| Not yet recruiting | 9 |
| Suspended | 6 |
| Enrolling by invitation | 5 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Assiut University | 68 |
| Assistance Publique - Hôpitaux de Paris | 54 |
| University Hospital, Strasbourg, France | 51 |
| University Hospital, Montpellier | 42 |
| Pfizer | 26 |
| Central Hospital, Nancy, France | 21 |
| Cairo University | 20 |
| Fondation Hôpital Saint-Joseph | 20 |
| Duke University | 19 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 18 |
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 |
|---|---|
| COVID-19 | 3,111 |
| Coronavirus Infections | 243 |
| Severe Acute Respiratory Syndrome | 92 |
| Post-Acute COVID-19 Syndrome | 79 |
| Anxiety Disorders | 73 |
| Respiratory Distress Syndrome | 56 |
| Neoplasms | 52 |
| Pneumonia | 51 |
| Critical Illness | 49 |
| Influenza, Human | 42 |
Trials
Showing 1 to 25 of 3,111. Each trial links to its page on Pharma Observatory.
3,011 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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