The ongoing saga of the H5N1 bird flu virus has taken a concerning turn. After initially appearing in US dairy cows in spring 2024, attributed to the B3.13 genotype, a new strain has emerged. The US Department of Agriculture (USDA) recently confirmed the detection of the D1.1 genotype in milk samples, marking the second spillover event in this outbreak. This development raises … [Read more...] about New H5N1 Bird Flu Virus Genotype Found In US Cows In Second Spillover Event