Pigs can become coinfected with bird and human viruses, allowing genes to swap to form a new, more dangerous virus that can more easily infect humans.

The USDA said there is no risk to the nation's pork supply from the Oregon case. The risk to the public from bird flu remains ...

That’s because there are five times as many pigs and cows in Denmark as there are people. Nearly two-thirds of its land is ...

Swine can act as so-called “mixing vessels” for human and bird flus, giving avian viruses an opportunity to adapt for spreading in people.

H5N1 bird flu has been discovered in a pig in Oregon, a development that has sparked new concerns among infectious disease experts.