Fig.1

Sankey diagrams showing overlap between ongoing or completed and static or living COVID-19 IPD-MAs. A Shows overlap between the focus, included study designs, and type of IPD-MA for all the ongoing or completed IPD-MAs. B Shows overlap between the included study population, interventions/exposures, and outcomes of all the ongoing or completed IPD-MAs. C Shows overlap between the focus, included study designs, and type of IPD-MA for only those IPD-MAs that requested data from authors. D Shows overlap between the included study population, interventions/exposures, and outcomes of only those that requested data from authors. ACEIs = angiotensin-converting-enzyme inhibitors. ARBs = angiotensin II receptor blockers. BCG = Bacillus Calmette-Guérin. ECMO = extracorporeal membrane oxygenation. GBS = Guillain‐Barré syndrome. MIS-C = multisystem inflammatory syndrome in children. Obs = observational. RCTs = randomised controlled trials. RT-PCR = reverse transcription polymerase chain reaction