Jan 31, 2025 · Clinicians can visit CDC's avian influenza (bird flu) information for health professionals for the latest guidance.

2 days ago · This is the second known instance of a type of avian flu being introduced into cattle herds by birds. It suggests that the virus could be seeding itself into cattle through introductions from wild ...

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 bird flu has ranged from mild to severe, including death.

Jan 31, 2025 · What started as a typical bird flu outbreak four years ago has evolved into a cross-species threat that's ruffling far more than feathers. As 2025 gets underway, the avian flu is ramping up. Jumping species. Dolphins and polar bears have it. So do smaller mammals such as wild foxes, skunks, and seals, leaving many dead or with neurological ...

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 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 ...

Apr 17, 2022 · There are two kinds of avian influenza: high pathogenicity (HPAI) and low pathogenicity (LPAI). Infected chickens react with flu-like symptoms when infected with the most common, which is low-pathogenicity avian influenza. Birds infected with the very contagious and highly pathogenic avian influenza die in 90% of cases.

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.

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.

1 day ago · Cow infections led to 40 of the 67 confirmed human cases of highly pathogenic avian influenza in the United States since early 2024, according to the U.S. Centers for Disease Control and Prevention.