The first outbreak of H5N9 bird flu in poultry has been reported in California on a duck farm leading to the culling of ...

U.S. public health officials have been told to stop working with the World Health Organization, effective immediately. A U.S. Centers for Disease Control and Prevention official, John Nkengasong, sent ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...