Mar 17, 2025 · The rapid spread of the highly infectious avian flu virus H5N1 has reached an “unprecedented” scale, wiping out hundreds of millions of birds worldwide and increasingly spilling over into...

Dec 17, 2024 · Avian influenza has caused the deaths of more than 300 million birds worldwide and the virus “is increasingly crossing species barriers”, according to UN health officers.

Mar 20, 2025 · The H5N1 strain of highly pathogenic avian influenza (HPAI) is present in wild birds worldwide and is causing outbreaks in U.S. domestic birds and dairy cattle. Many other species are also susceptible to this virus.

Mar 12, 2025 · Avian influenza is an influenza type A virus that occurs naturally in wild aquatic birds, including ducks, geese and gulls. Mild forms of avian influenza (known as low pathogenic avian influenza, or LPAI) are routinely found in wild birds and don’t cause serious illness.

Jan 7, 2025 · A day after the United States reported its first human death from avian flu, the UN World Health Organization (WHO) insisted on Tuesday that the risk to the wider population remains “low”.

May 24, 2022 · Avian influenza A (bird flu) viruses may be transmitted from infected birds to other animals, and potentially to humans, in two main ways: Directly from infected birds or from avian influenza A virus-contaminated environments. Through an …

Jan 30, 2025 · The strain of avian influenza currently causing outbreaks is highly contagious and easily transmitted, so it is often referred to as highly pathogenic avian influenza or HPAI. How is HPAI affecting bird populations?

Mar 27, 2025 · The H5N1 avian panzootic has resulted in cross-species transmission to birds and mammals, causing outbreaks in wildlife, poultry, and US dairy cattle with a range of host-dependent pathogenic outcomes. Although no human-to-human transmission has been observed, the rising number of zoonotic human cases creates opportunities for adaptive mutation ...

Avian influenza A (H5N1) is a subtype of influenza virus that infects birds and mammals, including humans in rare instances. The goose/Guangdong-lineage of H5N1 avian influenza viruses first emerged in 1996 and have been causing outbreaks in birds since then.

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 …