2 days ago · Clinicians can visit CDC's avian influenza (bird flu) information for health professionals for the latest guidance.

Avian influenza, also known as avian flu or bird flu, is a disease caused by the influenza A virus, which primarily affects birds but can sometimes affect mammals including humans. [1] Wild aquatic birds are the primary host of the influenza A virus, which is enzootic (continually present) in many bird populations.

Jan 17, 2025 · H5 bird flu is causing outbreaks in wild birds and poultry, other animals and sporadic human cases. Infections with highly pathogenic avian influenza A (H5N1) viruses in mammals have been reported. A multi-state outbreak of HPAI A (H5N1) bird flu in dairy cows was first reported on March 25, 2024.

Feb 4, 2025 · In late January, scientists at the World Organization for Animal Health (WOAH) reported the first cases of H5N9 avian influenza in the U.S., on a duck farm in California. The latest strain isn’t ...

Dec 20, 2024 · Most human cases of bird flu, caused by avian influenza A(H5) virus, in the United States have been mild, so far, and most were in people who had known exposure to sick or infected animals. The severity of illness associated with …

Jan 28, 2025 · Bird flu, or avian influenza, is spreading among livestock and other mammals in the United States, raising concerns that another pandemic may be looming. Last month, California declared a state of ...

1 day ago · An avian-flu outbreak is a time-consuming problem for a farmer. Hens must be killed, the barn sanitised, the sanitisation signed off by federal and state officials and new chickens brought in and ...

3 days ago · The newer variant of avian influenza that recently infected dairy cattle in Nevada has a genetic change that’s thought to help the virus copy itself in mammals — including humans — more ...

Jan 7, 2025 · Avian influenza A (H5N1), or bird flu, has killed millions of wild birds, and caused sporadic outbreaks among poultry and an ongoing multistate outbreak among cows in the United States. While there has been no known person-to-person transmission of the virus, there have been 67 reported human cases in the U.S. since 2022.

Jan 16, 2025 · Avian flu is rampant in poultry farms and in wild birds in the U.S. Every mutation brings the virus one step closer to the brink of human-to-human transmission, but predicting whether a virus will cross that threshold remains an uncertain science.