Avian flu, which recently leapt from chickens to cows, has now been detected in milk. Vox’s Keren Landman and Kenny Torrella explain how worried humans should be about the outbreak. This episode was produced by Haleema Shah, edited by Matt Collette, fact-checked by Amina Al-Sadi, engineered by Patrick Boyd, and hosted by Sean Rameswaram. Transcript at vox.com/todayexplained Support Today, Explained by making a financial contribution to Vox! vox.com/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices