Table 1

COVID-19 clinical trials summary (data from ClinicalTrials.gov, 7 May 2020), n=1221

Study characteristicNo of studies
Study type
 Patient registry84
 Observational485
 Interventional736
  Early phase I15
  Phase I66
  Phase II290
  Phase III200
  Phase IV47
Funding
 US Federal Government3
 NIH*11
 Industry138
 Other†585
Location (study site)‡
 Europe459
 North America294
 East Asia87
 Middle East55
 Africa36
 South America34
 South Asia16
 Southeast Asia11
 North Asia6
 Pacifica6
 Central America2

  • *US National Institutes of Health.

  • †Individuals, universities, organisations.

  • ‡Some studies have more than one study site within and across countries.