A version of the H5N1 virus that has killed one person and severely sickened another has been detected in milk samples collected from Nevada dairy herds.

Experts said the discovery raises questions about how widely the virus has spread, and underscores the difficulty of controlling infections among animals and people working with them. View on euronews

Six dairy herds in Nevada have tested positive for a newer strain of the H5N1 bird flu virus that’s been associated with severe infections in humans, according to the Nevada Department of Agriculture.