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| Withdrawn | 63 |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 76 to 100 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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