What to know about bird flu in 2025, from how it's spread to symptoms and egg impacts

From worries about food safety to egg prices, Americans have questions about the bird flu. 

This strain of bird flu, also known as H5N1, is not entirely new. It's been detected in a variety of bird populations since January 2022, and in March of last year, it was found in dairy cows for the first time. Since then, there have been nearly 70 human cases, mostly in dairy and poultry workers, including one fatality.

To help break down the latest, Dr. Céline Gounder, CBS News medical contributor and editor-at-large for public health at KFF Health News, shared what to know on "CBS Mornings Plus" Thursday.