Highly infectious H5N1 virus, also known as the bird flu virus has tightened its grip on the United States. For the first ...

A snow goose in West Philadelphia ’s Carroll Park neighborhood is the city’s first suspected case of a highly contagious ...

San Francisco confirmed that a child in the city became the first case of H5N1. A panel of biotech leaders discussed what ...

The CDC is now calling for subtyping of influenza A viruses in all hospitalized patients -- and on an accelerated timeline, ...

H5N1 bird flu has been found to infect mammals more extensively. Although there has yet to be evidence of human-to-human ...

Avian flu is a common illness among birds, but it can spread to humans and other mammals. The virus is shed through ...

The US Centers for Disease Control and Prevention is urging hospitals to accelerate advanced testing of people they suspect ...

H5N1 remains a major threat to poultry and wild bird populations, leading to large-scale culling of domestic fowl in many ...

The A(H5N1) virus generally causes mild illness of short duration, mainly among US adults exposed to infected animals.

The variant circulating in America appears to be less lethal and could be triggering different responses from the immune ...

A number of bird flu cases have been reported in the Chicago area in recent weeks, leading to many questions about how quickly the virus is spreading and how worried residents should be.

The first human death caused by H5N1 in the U.S. was reported in Louisiana on Jan. 6. Here's what to know about bird flu.