Avian Influenza A(H5N1) Virus among Dairy Cattle, Texas, USA.

The article focuses on the emergence of clade 2.3.4.4b avian influenza A(H5N1) in North America and its potential impact on mammalian hosts, including humans, contrasting with the susceptibility of cattle primarily to influenza D virus. Topics include the investigation into influenza virus infections among dairy cattle in Texas, where veterinary diagnostic laboratories initially explored other pathogens before considering influenza A virus as a possible cause.