2022年5月24日 · More recently, H5N1 viruses from birds have caused sporadic infections in wild foxes in the U.S. and in other countries. 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.

2024年12月20日 · 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.

2025年2月26日 · The common human flu is usually a type A (H1N1) or type A (H3N2) virus. The H5 and H7 subtypes are the most common causes of HPAI, and are also the subtypes that are most likely to infect humans. The current outbreak of HPAI is due to an H5N1 subtype.

2024年4月30日 · In the spring of 2009, a novel influenza A H1N1 virus emerged in humans. It was detected first in the United States and spread quickly across the United States and the world. This new H1N1 virus contained a unique combination of swine, avian and human influenza genes not previously identified in animals or people.

2024年6月8日 · Bird flu, also called avian influenza, is caused by influenza type A virus infections in bird species. Depending on the strain, bird flu may cause the bird to have no symptoms, mild illness, serious illness or lead to the death of the bird. Bird flu rarely infects humans.

2023年10月3日 · In 1997, human infections with A (H5N1) viruses were reported during an outbreak in poultry in Hong Kong SAR, China. Since 2003, this virus has spread in bird populations from Asia to Europe and Africa, and to the Americas in 2021, and has become endemic in poultry populations in many countries.

Influenza A virus subtype H1N1 (A/H1N1) is a subtype of influenza A virus (IAV). Some human-adapted strains of H1N1 are endemic in humans and are one cause of seasonal influenza (flu). [1] . Other strains of H1N1 are endemic in pigs (swine influenza) and in birds (avian influenza). [2] .

2024年6月18日 · Type A influenza viruses often originate in aquatic birds and spread among bird species, which is then known as avian influenza or bird flu. But they can also spread to other mammals if the virus has the right mutations. Some strains of the Type A virus H1N1 are endemic (consistently present) in humans, birds and pigs.

2025年2月25日 · Back in 2009, we had swine flu because that virus came via the pig from birds. An individual pig can become infected with the bird flu virus but also simultaneously infected with a human flu virus.

2024年1月12日 · Swine flu and bird flu are both influenza viruses that can infect humans, but they are caused by different virus strains. While they share some similarities, there are important differences between swine flu (also known as H1N1 flu) and avian or …