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.

A nonprofit animal rights and medical ethics organization is suing the Defense Department for refusing to disclose details on its use of pigs and goats for medical training at four major military ...