The World’s Best Hope to End the Pandemic Still Needs More Doses.

On Jan. 23, 2020, the day the novel coronavirus forced the Chinese city of Wuhan into lockdown, two American doctors named Seth Berkley and Richard Hatchett met at the bar of the Hard Rock Hotel in Davos, Switzerland, to talk about vaccines.

At that point it wasn’t clear how soon, or even whether, effective vaccines for the disease caused by the virus could be developed. But Berkley, an epidemiologist who runs Gavi, a nonprofit that delivers immunizations to poor countries, was thinking about how the crisis would unfold if the virus swept across the globe.