Kuala Lampur, April 3 -- Only by coming together will the world be able to face down the Covid-19 pandemic and its shattering consequences. At an emergency virtual meeting last Thursday, G20 leaders took steps in the right direction. But we are still far away from having a coordinated, articulated global response that meets the unprecedented magnitude of what we are facing.

Far from flattening the curve of infection, we are still well behind it. The disease initially took 67 days to infect 100,000 people; soon, 100,000 people and more will be infected daily. Without concerted and courageous action, the number of new cases will almost certainly escalate into the millions, pushing health systems to the breaking point, economies into a nose...