Health officials say there’s no evidence bird flu is spreading between people after investigating a Missouri infection.

Despite health officials’ arduous efforts to track human infections, surveillance is marred by delays, inconsistencies, and ...

A person in Missouri has been diagnosed with bird flu — despite never coming into contact with any animals, the Centers for Disease Control and Prevention announced on Friday. The adult, who was ...

Bird flu cases have more than doubled in the country within a few weeks, but researchers can’t determine why the spike is happening because surveillance for human infections ...

Cases of whooping cough are on the rise across the U.S. and in Colorado, including Jefferson and El Paso counties.