H5N1 avian influenza, more commonly known as bird flu, has infected more than 100 million birds in the U.S. and almost 500 ...

The World Health Organization voiced alarm at the growing spread of H5N1 bird flu to new species, including humans, who face an ‘extraordinarily high’ mortality rate. Hong Kong should test for ...

NEW YORK (AP) — A pig at an Oregon farm was found to have bird flu, the U.S. Department of Agriculture announced Wednesday. It’s the first time the virus has been detected in U.S. swine and ...