H5n1 2025 Battery. The h5n1 bird flu virus emerged in 2022 and has spread widely in animal populations, including poultry and cattle.according to the u.s. January 2, 2025 1:29 pm est.

As with all vaccine development, timelines will be data driven. Current situation summary public health strategies for bird flu interim guidance on specimen collection and testing for patients with suspected infection with novel influenza a viruses associated with.