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    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.


    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. It is an orthomyxovirus that contains the glycoproteins hemagglutinin and neuraminidase.


    H1N1 flu (swine flu) - Symptoms and causes - Mayo Clinic

    WebMar 23, 2023 · 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 …


    What's the difference between H1N1 flu and influenza A?

    WebMay 18, 2021 · H1N1 fluis a subtype of influenza A. Subtypes of influenza A are categorized based on two proteins on the surface of the virus, hemagglutinin (H) and neuraminidase (N). There are many Hand Nsubtypes, and each one is numbered. All Hand Nflu subtypes are influenza A viruses.


    Background and Epidemiology - Centers for Disease Control and Prevention

    WebEach season, viruses belonging to influenza A subtypes A (H1N1) and A (H3N2) and to both B lineages co-circulate ( 1, 2 ). Natural infection and vaccination induce the production of antibodies to influenza HA and NA surface glycoproteins, which reduce likelihood of …


    Influenza A H1N1 | virus | Britannica

    Webinfluenza A H1N1, also called influenza type A subtype H1N1, virus that is best known for causing widespread outbreaks, including epidemics and pandemics, of acute upper or lower respiratory tract infection. The influenza A H1N1 virus is a member of the family Orthomyxoviridae (a group of RNA viruses).


    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.


    Interim results of the effectiveness of 2022-2023 influenza vaccine ...

    Web2 days ago · Different types (A or B) or subtypes (e.g., A(H3N2), A(H1N1)pdm09) of influenza viruses exist. In the European continent, between 2022 and 2023, several influenza virus subtypes have been circulating.


    Influenza A subtyping: seasonal H1N1, H3N2, and the appearance ... - PubMed

    WebInfluenza virus subtyping has emerged as a critical tool in the diagnosis of influenza. Antiviral resistance is present in the majority of seasonal H1N1 influenza A infections, with association of viral strain type and antiviral resistance.


    Influenza A (H1N1) virus induced long-term remission in a

    WebHere, we present the first case of long-term complete remission (CR) induced by influenza A (IAV, H1N1 subtype) in a refractory AML patient and have functionally validated this finding in two different animal disease models. We observed a significant increase in the proportion of helper T cells in the patient after IAV infection. The levels of ...