Dec 20, 2024 · The most frequently identified subtypes of avian influenza A viruses that have caused human infections are H5, H7 and H9 viruses. Specifically, A(H5N1) and A(H7N9) viruses have caused the majority of avian influenza A virus infections reported in people, with HPAI A(H5N6) and LPAI A(H9N2) viruses also causing human infections in recent years.

Jan 7, 2025 · Avian influenza A (H5N1), or bird flu, is spreading among cows in the United States. A Yale Medicine expert tells you what you need to know to stay safe.

Avian influenza, commonly called “bird flu,” is a viral infection that spreads in birds, cows and other animals. It can sometimes spread to people. In humans, H5 subtypes of influenza A are the most common cause.

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 many bird populations, and also panzootic (affecting animals of many species over a …

In 2022, the avian influenza A virus H5N1 was first identified in wild birds and domestic poultry flocks in the United States. This virus has continued to infect wild and domestic birds since 2022 and has also been detected in more than 200 mammals in the U.S.

Jan 15, 2025 · Bird flu, also known as avian influenza A (H5N1) or highly pathogenic avian influenza (HPAI), is caused by a virus that can cause serious illness and death in birds and mammals. Human infections with bird flu viruses are rare, but they can happen when the virus gets into a person's eyes, nose, mouth, or when inhaled.

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.

21 hours ago · New bird flu variant found in dairy cattle. Can H5N1 be transmitted to humans? According to the the US Department of Agriculture, this is the first ever detection of this bird flu virus variant in ...

Jan 15, 2025 · Influenza A (H5N1) has been spreading in wild birds globally since the mid-1990s and in the United States since 2014. The virus initially spread to commercial and backyard poultry and has also infected mammals, including minks, sea lions and now dairy cattle.

1 day ago · As cases of bird flu continue to climb among wild birds, poultry and cattle in the U.S., the virus poses an increasing threat to human health. A total of 67 human cases of the H5N1 virus have been ...