Influenza A virus subtype H1N1 - Wikipedia
WEBIn virology, influenza A virus subtype H1N1 (A/H1N1) is a subtype of influenza A virus. Major outbreaks of H1N1 strains in humans include the 1918 Spanish flu pandemic, the 1977 Russian flu pandemic and the 2009 swine flu pandemic.
What's the difference between H1N1 flu and influenza A?
WEBSep 15, 2023 · There are many H and N subtypes and each one is numbered. H1N1 flu is a subtype of influenza A. Each influenza subtype includes many different strains of influenza virus. Not all strains infect people. Subtypes of influenza A viruses currently found in people are strains of H1N1 and H3N2.
H1N1 flu (swine flu) - Symptoms and causes - Mayo Clinic
WEBMar 23, 2023 · Overview. The H1N1 flu, sometimes called swine flu, is a type of influenza A virus. During the 2009-10 flu season, a new H1N1 virus began causing illness in humans. It was often called swine flu and was a new combination of influenza viruses that infect pigs, birds and humans.
Types of Influenza Viruses | CDC
WEBMar 30, 2023 · Current subtypes of influenza A viruses that routinely circulate in people include A (H1N1) and A (H3N2). Influenza A subtypes can be further broken down into different genetic “clades” and “sub-clades.” See the “Influenza Viruses” graphic below for a visual depiction of these classifications.
H1N1 Influenza - StatPearls - NCBI Bookshelf - National Center …
WEBOct 25, 2022 · H1N1 influenza is a subtype of influenza A virus, a communicable viral illness which causes upper and in some cases lower respiratory tract infections in its host. This results in symptoms such as nasal secretions, chills, fever, decreased appetite, and in some cases, lower respiratory tract disease.
Influenza Type A Viruses | Avian Influenza (Flu) - Centers for …
WEBFeb 1, 2024 · Only two influenza A virus subtypes A (H1N1)pdm09, and A (H3N2), are currently circulating among people. Influenza A viruses have been detected and are known to circulate in seven different animal species or groups, including humans, wild water birds, domestic poultry, swine, horses, dogs and bats.
Influenza A (H1N1) outbreak - World Health Organization (WHO)
WEBOverview. Before the H1N1 pandemic in 2009, the influenza A (H1N1) virus had never been identified as a cause of infections in people. Genetic analyses of this virus have shown that it originated from animal influenza viruses and is unrelated to the human seasonal H1N1 viruses that have been in general circulation among people since 1977.
H1N1 flu (swine flu) - Overview - Mayo Clinic
WEBMar 23, 2023 · Overview. The H1N1 flu, sometimes called swine flu, is a type of influenza A virus. During the 2009-10 flu season, a new H1N1 virus began causing illness in humans. It was often called swine flu and was a new combination of influenza viruses that infect pigs, birds and humans.
Influenza A virus - Wikipedia
WEBInfluenza A virus (IAV) is a pathogen that causes the flu in birds and some mammals, including humans. It is an RNA virus whose subtypes have been isolated from wild birds. Occasionally, it is transmitted from wild to domestic birds, and this may cause severe disease, outbreaks, or human influenza pandemics.. Each virus subtype includes a wide variety of strains with differing pathogenic ...
Influenza (Seasonal) - World Health Organization (WHO)
WEBOct 3, 2023 · Currently circulating in humans are subtype A (H1N1) and A (H3N2) influenza viruses. The A (H1N1) is also written as A (H1N1)pdm09 as it caused the pandemic in 2009 and replaced the previous A (H1N1) virus which had circulated prior to 2009. Only influenza type A viruses are known to have caused pandemics.
Skip to content