UW-Madison: H5N1 virus isolated from infected dairy worker is 100% lethal in ferrets, but does not appear to be circulating in nature anymore

MADISON — A strain of H5N1 avian influenza virus found in a Texas dairy worker who was infected this spring was able to spread among ferrets through the air, although inefficiently, and killed 100% of infected animals in studies University of Wisconsin–Madison researchers performed with the strain earlier this year. The good news: the dairy worker experienced mild symptoms and fully recovered, and...