H5N1 bird flu spills over again; Nevada cows hit with different, deadly strain The finding suggests a new spillover event, further dashing hopes of containment. Beth Mole – Feb 5, 2025 5:52 pm | 162 ...

A new version of the H5N1 bird flu virus has been detected in milk samples collected from dairy herds in Nevada. The strain, known as D1.1, had so far been associated only with migrating birds and ...