2 days ago · H5 bird flu is widespread in wild birds worldwide and is causing outbreaks in poultry and U.S. dairy cows with several recent human cases in U.S. dairy and poultry workers. While the current public health risk is low, CDC is watching the situation carefully and working with states to monitor people with animal exposures.

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 …

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 15, 2025 · Most cases of H5N1 bird flu associated with the ongoing outbreak in the United States have resulted in mild symptoms. CDC experts and other scientists continue to work to understand why some infections, including an infection reported in Canada and one reported in Louisiana, resulted in serious illness.

3 days ago · When bird flu first struck dairy cattle a year ago, it seemed possible that it might affect a few isolated herds and disappear as quickly as it had appeared. ... Adding H5N1 to the list would be ...

6 days ago · Cows with bird flu shed large amounts of the H5N1 virus in their milk, although pasteurization has been confirmed to kill the virus, leaving the commercial milk supply safe to drink. (Raw milk is ...

Jan 8, 2025 · In contrast, H5N1 often kills birds that catch it, so it is classified as a highly pathogenic avian influenza. To complicate matters, although bird flu viruses primarily prey on birds, they...

1 day ago · It is also among the descendants of the 2.3.4.4b grouping of bird flu viruses that has decimated flocks in recent years. "The combination H5N9 is not new and other versions, like H5N5 also exist.