ClinicalTrials.gov is a database of privately and publicly funded clinical studies conducted around the world. See listed clinical studies related to the coronavirus disease (COVID-19)
European Union clinical trials for COVID-19
The ISRCTN registry is a primary clinical trial registry recognised by WHO and ICMJE that accepts all clinical research studies (whether proposed, ongoing or completed), providing content validation and curation and the unique identification number necessary for publication. All study records in the database are freely accessible and searchable.