Public health officials in Oregon announced on Wednesday the first known case of H5N1 bird flu in a pig, raising new concerns about the growing risk of the virus being able to infect humans more easily.

Oregon officials announced Wednesday that a severe form of bird flu has been detected for the first time in a pig on a small farm in Crook County in central

But finding bird flu in a pig raises worries that the virus may be hitting a stepping stone to becoming a bigger threat to people, said Jennifer Nuzzo, a Brown University pandemic researcher. Pigs can be infected with multiple types of flu,