Clinical trials
Completed Observational COVID-19 trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
1,841 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2009 | 1 |
| 2014 | 3 |
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 22 |
| 2020 | 1,064 |
| 2021 | 461 |
| 2022 | 179 |
| 2023 | 56 |
| 2024 | 30 |
| 2025 | 7 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 1,841 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| University Hospital, Montpellier | 30 |
| Assistance Publique - Hôpitaux de Paris | 26 |
| Pfizer | 18 |
| University Hospital, Strasbourg, France | 16 |
| Central Hospital, Nancy, France | 15 |
| Kanuni Sultan Suleyman Training and Research Hospital | 15 |
| Assiut University | 14 |
| AstraZeneca | 14 |
| University Hospital, Toulouse | 14 |
| Centre Hospitalier Universitaire de Nīmes | 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 |
|---|---|
| COVID-19 | 1,841 |
| Coronavirus Infections | 161 |
| Severe Acute Respiratory Syndrome | 61 |
| Anxiety Disorders | 49 |
| Post-Acute COVID-19 Syndrome | 38 |
| Respiratory Distress Syndrome | 34 |
| Critical Illness | 30 |
| Neoplasms | 26 |
| Respiratory Insufficiency | 25 |
| Virus Diseases | 25 |
Trials
Showing 1 to 25 of 1,841. Each trial links to its page on Pharma Observatory.
1,741 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.