New H5N1 Bird Flu Virus Genotype Found In US Cows In Second Spillover Event
Avian flu first made the jump from birds into dairy cows on farms in a number of US states in spring 2024. Until now, all such cases of the H5N1 virus have been ascribed to a genotype called B3.13, but the US Department of Agriculture (USDA) has just announced the detection of a second genotype,