Peter M. Fisher/Getty Images
Go_ahead/Getty Images; Jenny Chang-Rodriguez/BI
The new strain of bird flu has infected more than 90 million chickens and has spread to dairy cows and even humans. Here's what you need to know about the "global pandemic for animals."
Moment/Getty Images
![](https://i.kinja-img.com/image/upload/c_fit,q_80,w_636/105c5bfe70fefb554596af3ed5376f42.jpg)
This story was originally published by Grist. Sign up for Grist’s weekly newsletter here.
Jim Heimann Collection via Getty Images
Auscape/Universal Images Group via Getty Images
Jeffrey Fiterman/Alan Breslauer
ANATOLII STEPANOV/AFP via Getty Images