New Mexico
Why 4 new bird flu developments have experts worried about the virus
The H5N1 bird flu virus is changing and getting more opportunities to adapt to humans. Experts are worried that it could soon become transmissible.
Since H5N1 made the unexpected jump from birds to cattle, experts are increasingly worried about human spread.Rodrigo Abd/AP Photo
- The bird flu, or avian influenza, is increasingly worrying … [+8477 chars]
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