Isolation and characterization of a clade 2.3.4.4b genotype D1.1 H5N1 virus from dairy cattle in Wisconsin
The isolation and characterization of a clade 2.3.4.4b, genotype D1.1 H5N1 virus from bulk milk collected during a spillover event in Wisconsin in December 2025 highlights the genetic and phenotypic diversity of HPAI H5N1 viruses infecting dairy cattle and underscores the importance of continued surveillance and functi...