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      We need to keep an eye on avian influenza

      brief-report
      1 , 2 , 3 , , 4 ,
      Nature Reviews. Immunology
      Nature Publishing Group UK
      Influenza virus, Influenza virus

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          Abstract

          H5N1 avian influenza viruses of the A/goose/Guangdong/1/96 lineage have been circulating in wild birds for many years, have inflicted significant economic losses on the poultry industry and have caused zoonotic infections since 1997. However, the recent spread of avian H5N1 virus to the Americas and its detection in mammals have raised concerns about its pandemic potential.

          Abstract

          Recent evidence of transmission of avian H5N1 viruses among mammals raises concerns about their pandemic potential. We need to increase our awareness and preparedness, and should also be thinking about safe farming practices to prevent the emergence of concerning pathogens in the future.

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          Most cited references8

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          Is Open Access

          Highly pathogenic avian influenza A(H5N1) virus infection in farmed minks, Spain, October 2022

          In October 2022, an outbreak in Europe of highly pathogenic avian influenza (HPAI) A(H5N1) in intensively farmed minks occurred in northwest Spain. A single mink farm hosting more than 50,000 minks was involved. The identified viruses belong to clade 2.3.4.4b, which is responsible of the ongoing epizootic in Europe. An uncommon mutation (T271A) in the PB2 gene with potential public health implications was found. Our investigations indicate onward mink transmission of the virus may have occurred in the affected farm.
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            Genetic Characterization of the Pathogenic Influenza A/Goose/Guangdong/1/96 (H5N1) Virus: Similarity of Its Hemagglutinin Gene to Those of H5N1 Viruses from the 1997 Outbreaks in Hong Kong

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              Seroevidence for H5N1 influenza infections in humans: meta-analysis.

              The prevalence of avian H5N1 influenza A infections in humans has not been definitively determined. Cases of H5N1 infection in humans confirmed by the World Health Organization (WHO) are fewer than 600 in number, with an overall case fatality rate of >50%. We hypothesize that the stringent criteria for confirmation of a human case of H5N1 by WHO do not account for a majority of infections but rather the select few hospitalized cases that are more likely to be severe and result in poor clinical outcome. Meta-analysis shows that 1 to 2% of more than 12,500 study participants from 20 studies had seroevidence for prior H5N1 infection.
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                Author and article information

                Contributors
                Florian.krammer@mssm.edu
                stacey.schultz-cherry@stjude.org
                Journal
                Nat Rev Immunol
                Nat Rev Immunol
                Nature Reviews. Immunology
                Nature Publishing Group UK (London )
                1474-1733
                1474-1741
                21 March 2023
                : 1-2
                Affiliations
                [1 ]GRID grid.59734.3c, ISNI 0000 0001 0670 2351, Department of Microbiology, , Icahn School of Medicine at Mount Sinai, ; New York, NY USA
                [2 ]GRID grid.59734.3c, ISNI 0000 0001 0670 2351, Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), , Icahn School of Medicine at Mount Sinai, ; New York, NY USA
                [3 ]GRID grid.59734.3c, ISNI 0000 0001 0670 2351, Department of Pathology, Molecular and Cell Based Medicine, , Icahn School of Medicine at Mount Sinai, ; New York, NY USA
                [4 ]GRID grid.240871.8, ISNI 0000 0001 0224 711X, Department of Infectious Diseases, , St Jude Children’s Research Hospital, ; Memphis, TN USA
                Author information
                http://orcid.org/0000-0003-4121-776X
                http://orcid.org/0000-0002-2021-727X
                Article
                868
                10.1038/s41577-023-00868-8
                10028763
                36944755
                d4d416f7-3629-4859-b99b-af066a282ac3
                © Springer Nature Limited 2023

                This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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