Nature Medicine, Published online: 15 April 2026; doi:10.1038/s41591-026-04300-1
Using active and passive genomic surveillance, researchers observed the rapid spread of high pathogenicity avian influenza H5N1 D1.1 viruses in wild birds during the 2024 migratory season, which coincided with detection in humans, but did not identify mammalian adaptive markers in viruses from wild birds.
