Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of ...

Some of the issues: In March 2017, an outbreak ... Asian lineage HPAI H7N9 viruses reported in China. A USDA bird flu response plan, updated in May 2017 during Trump’s first administration ...

As bird flu sweeps across US poultry and cattle farms, researchers are racing to find ways to contain the outbreaks before ...