The open-air "wet" markets of Asia, where wildlife and domestic animals are kept confined, bought, killed and washed in settings where deadly viruses stew, is a huge problem—one that is explored in David Quammen's book "Spillover"  Covid-19 is believed to have emanated from a live infected bat and from that  single creature is wreaking havoc for billions of people around the world.  This photo of caged ducks taken by Daniel Case in the Luohu District of Shenzhen, China
The open-air "wet" markets of Asia, where wildlife and domestic animals are kept confined, bought, killed and washed in settings where deadly viruses stew, is a huge problem—one that is explored in David Quammen's book "Spillover" Covid-19 is believed to have emanated from a live infected bat and from that single creature is wreaking havoc for billions of people around the world. This photo of caged ducks taken by Daniel Case in the Luohu District of Shenzhen, China