H5N1 Virus Isolated From Infected Dairy Worker Is 100% Lethal in Ferrets, but Does Not Appear to Be Circulating in Nature Anymore

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. 

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