Poultry farmers are in flock-down. The bird flu known as H5N1 is being called “the largest foreign animal disease outbreak in US history.” Vox’s Benji Jones and Johns Hopkins University researcher Tom Philpott say the virus underscores the poultry industry’s shortcomings. This episode was produced by Avishay Artsy, edited by Amina Al-Sadi, fact-checked by Laura Bullard, engineered by Paul Robert Mounsey, and hosted by Noel King. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices