Previously undetected H5N1 avian flu cases in farmworkers revealed in new report

A team of US researchers has revealed evidence of highly pathogenic H5N1 avian flu infections in two Texas farmworkers not previously confirmed to have the disease, and the investigators also cultured infectious H5N1 virus from milk and cattle samples taken from two Texas dairy farms that previously had H5N1 outbreaks.

The research, led by scientists with the University of Texas Medical Branch (UTMB) at Galveston, was published yesterday on the preprint server medRxiv, meaning that it has not yet been peer-reviewed. It comes as the US Department of Agriculture (USDA) confirmed two more dairy farms affected by H5N1 in cows, as well as newly infected mammalian species.