Bird Flu Update 2025 Usa Today. For nearly four months, the spread of bird flu in the nation’s dairy cattle has stoked fears that, if left unchecked, the virus could eventually unleash a pandemic. Dairy cows with several recent human cases in u.s.

Four poultry workers in colorado recently contracted bird flu, bringing the total of u.s. Concerns grow as ‘gigantic’ bird flu outbreak runs rampant in us dairy herds.