The traditional response to virus outbreaks in farms is known as stamping out. This method involves killing the birds to contain the spread of the virus.
The outbreak of bird flu currently tearing through the nation’s poultry is the worst in U.S. history. Scientists say it is now spreading beyond farms into places and species it has never been before.
Emily Anthes, a science reporter for The Times, explains.
Guest: Emily Anthes, a science reporter for The New York Times.