H5N9 is “not commonly seen in poultry in general,” says Eman Anis, assistant professor at the University of Pennsylvania ...

Bird flu has descimated poultry flocks and infected cattle herds. The risk to humans is currently low, but that could easily change as influenza can rapidly change.

Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. It can range from mild ...

In the study of infectious diseases, a critical and complex phenomenon is the transmission of viruses across different host species. Such events can lead to ...