CDC data released over the past two weeks ... who were infected over the break some time to show symptoms. The worst-case scenario is that low transmission throughout autumn was sheer luck ...

The U.S. Centers for Disease Control and Prevention (CDC) on Wednesday confirmed the first case of severe bird flu in the United States. The patient had been exposed to sick and dead birds in ...

The case was confirmed Dec. 13. According to agency officials, the patient had exposure to sick and dead birds in backyard flocks. This is the first case of H5N1 bird flu in the U.S. that has been ...