Bird Flu 2024 In Humans. But to help people get accurate information about the highly contagious h5n1 virus that causes the infection — also known as influenza a or h5 — a trio of state departments teamed. A major outbreak of a new strain of bird flu—formally named influenza a virus subtype h5n1 —has since killed millions of wild birds and infected poultry, dairy cattle, domestic cats and a small.
H5 bird flu is widespread in wild birds worldwide and is causing outbreaks in poultry and u.s. Derek davis/portland press herald via getty images.