As bird flu continues to spread in the US and worldwide, what's the risk that it could start a human pandemic? 4 questions answered
- Written by Sara Sawyer, Professor of Molecular, Cellular and Developmental Biology, University of Colorado Boulder
Bird flu is transmitted mainly by wild birds, like these snow geese in Ruthsberg, Md., in January 2023.Photo by JIM WATSON/AFP via Getty ImagesAn outbreak of H5N1 avian influenza that started in 2021 has become the largest bird flu outbreak in history, both in the U.S. and worldwide. In the U.S. the virus has led to the destruction of millions of...