What’s Behind the Ivermectin Frenzy?

Ivermectin is a drug that emerged in the 1970s, used mainly for deworming horses and other livestock. But during the pandemic, it has been falsely lauded in some corners as a kind of miracle cure for the coronavirus. What is fueling the demand for a drug that the medical establishment has begged people not to take? Guest: Emma Goldberg, a writer for The New York Times.