Influenza is a highly contagious viral infection that affects the respiratory system. Although often dismissed as a seasonal ...

That's the way one scientist puts it — referring to how infected wild birds survive long enough to spread it to birds and ...

When it comes to the potential of H5N1 avian flu picking up mutations that might lead to human-to-human spread, that "train has already left the station," warns 1 infectious disease expert.

Tools used to contain previous bird flu outbreaks aren’t working this time, experts say. Since March, the virus has sickened at least 67 people in the U.S. and killed one, with egg producers begging ...