The USDA has confirmed the infection of US dairy cows with a second form of bird flu, specifically a new strain of H5N1 avian influenza, that has been reported in Nevada herds. This strain is associated with severe human infections and has already led to the death of a Louisiana resident. Following the detection, dairy herds in Nye and Churchill counties have been quarantined as part of efforts to contain the outbreak. The discovery marks the first instance of this avian influenza genotype in dairy cattle, prompting state officials to expand containment efforts and assess the potential impact on public health and the agriculture industry.