H5 Bird Flu: Current Situation | Bird Flu | CDC
Dec 12, 2025 · CDC provides an update on recent developments in the multistate outbreak of avian influenza A (H5N1) The current outbreak began in late March 2024 with the detection of H5N1 bird …
Influenza A virus subtype H5N1 - Wikipedia
Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes the disease avian influenza (often referred to as "bird flu"). It is enzootic (maintained in the population) in …
H5N1 Hpai – Resources & Guidance | Animal and Plant Health ...
Dec 19, 2025 · The H5N1 strain of highly pathogenic avian influenza (HPAI) is present in wild birds worldwide and is causing outbreaks in U.S. domestic birds and dairy cattle.
Bird flu (H5N1) resource center - American Medical Association
May 7, 2025 · Bird flu (H5N1) is caused by an infection with avian influenza type A viruses, which primarily spread among wild aquatic birds and can infect other animals. Highly pathogenic avian …
Influenza: A (H5N1) - World Health Organization (WHO)
May 16, 2024 · H5N1 is one of several influenza viruses that causes a highly infectious respiratory disease in birds called avian influenza (or "bird flu"). Infections in mammals, including humans, have …
H5N1 Bird Flu: What You Need to Know - Yale Medicine
Jan 7, 2025 · "Avian influenza A (H5N1)," "bird flu," and "H5N1 bird flu" all refer to an illness caused by influenza type A viruses, which primarily affect birds. H5N1 bird flu was first identified in geese in …
Bird flu: Your questions on symptoms, spread and safety ...
Apr 18, 2025 · Bird flu, also known as avian influenza and H5N1, has spread beyond wild birds and domestic poultry to dozens of mammal species, including dairy cows. The risk of infection in people …