The Sunday Read: ‘Animals That Infect Hu...

There’s a working theory for the origins of Covid-19. It goes like this: Somewhere in an open-air market in Wuhan, China, a new coronavirus, growing inside an animal, first made the jump to a human. But what happens when diseases spread in the other direction? Sonia Shah, a science journalist, explores the dangers of “spillback,” or “reverse zoonosis”: when ... Show More