A 3-year-old girl in western Mexico has died after contracting bird flu in the country’s first confirmed human case of bird flu, Mexican health authorities said Tuesday.

At the viral chatter stage of an outbreak, pathogens are just starting to infect people in sporadic bursts. It's a sign that ...

Federal regulators were responsible for recalling pet food contaminated with bird flu, which killed household cats.

A dangerous bird flu, in other words, was suddenly circulating in mammals—mammals with which people have ongoing, extensive ...