Avian influenza, or bird flu, is highly infectious in birds and usually fatal. While it doesn't spread to humans nearly as much, it has a high fatality rate.

The two strains of avian flu that have killed the most people are H5N1 and H7N9. The first human cases of H5N1 were detected in China in 1997, but the bulk of cases came between 2003 and 2015 ...

Since 2022 in the US, the avian flu H5N1 virus has been detected in more than 200 mammals. In March 2024, a multistate outbreak of this virus was reported in dairy cattle.

Recent viral mutations have shown avian influenza’s adaptability to mammalian hosts, prompting infectious disease, animal health, and environmental health experts to remain vigilant.

Avian influenza viruses are not easily transmitted from birds to humans or to other animals. Humans are accidental hosts — meaning that the virus does not typically circulate among people.

In Europe, epidemics of highly pathogenic avian influenza (HPAI) used to be a seasonal phenomenon associated with migratory waterfowl that were returning to their overwintering sites in the autumn.

New study says avian flu could potentially spread to humans, but the danger is currently low 02:09. PHILADELPHIA (CBS) -- Concern is growing about the avian flu now spreading to marine mammals and ...

When a chicken has avian flu, it’s not that hard to tell. The incubation period is relatively short, and when they get sick, they get really sick, and can even drop dead, seemingly out of nowhere.

Avian influenza continues to spread worldwide. UC Davis scientists are helping to monitor its expansion among wildlife, poultry and other species. In early April, Marcela Uhart, director of the Latin ...

Avian flu typically spreads between wild and domestic birds but can spread to other animals and people. There have now been more than 40 confirmed human cases in the United States, according to ...

Avian influenza, or the bird flu, is an extremely infectious respiratory disease that affects all domestic poultry, including laying hens, broilers, and turkeys, as well as waterfowl and game ...