Maricopa County health officials say that an influenza subtype associated with the avian flu has been detected in wastewater in the county.

A virologist explains that why this probably isn’t the big one — but that it’s a sign of bad things happening with the virus.

Here's what the latest research is saying about how it is spreading and how to keep yourself and your pets safe.

Federal health officials have confirmed unsettling new details about the first United States case of severe bird flu, ...