As the coronavirus spreads, a drug that once raised the world’s hopes is given a second shot
A decade ago, a group of chemists cooked up a compound they simply called 3a and that, in lab experiments, fought off a number of different viruses. One was a type of coronavirus.
Now, the descendant of that molecule — Gilead Sciences’ remdesivir — is being rushed to patients with infections from the novel coronavirus in hopes that it can reduce the intensity and duration of Covid-19 and ease the burden of the pandemic on health systems.

