Bird Flu 2025. How widespread is the virus in dairy cattle? Since 2003, this virus has spread in bird populations from asia to europe and africa, and to the americas in 2021, and has become endemic in poultry populations in.
None of this is clear yet. For nearly four months, the spread of bird flu in the nationโs dairy cattle has stoked fears that, if left unchecked, the virus could eventually unleash a pandemic.