Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?

The focus of this commentary is represented by the pandemic risk associated with the highly pathogenic avian influenza (HPAI) A(H5N1) virus, clade 2.3.4.4b. More in detail, the herein dealt pandemic alarm appears to be primarily justified by the huge and progressively growing number of virus-suscept...

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Main Author: Giovanni Di Guardo
Format: Article
Language:English
Published: MDPI AG 2025-06-01
Series:Veterinary Sciences
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Online Access:https://www.mdpi.com/2306-7381/12/6/566
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author Giovanni Di Guardo
author_facet Giovanni Di Guardo
author_sort Giovanni Di Guardo
collection DOAJ
description The focus of this commentary is represented by the pandemic risk associated with the highly pathogenic avian influenza (HPAI) A(H5N1) virus, clade 2.3.4.4b. More in detail, the herein dealt pandemic alarm appears to be primarily justified by the huge and progressively growing number of virus-susceptible domestic and wild birds and mammals, including threatened marine mammal species like South American sea lions and elephant seals as well as harbour porpoises, bottlenose dolphins and polar bears. Of major concern is the susceptibility of dairy cattle to HPAI A(H5N1) virus, particularly the documented and unprecedented colonization of host’s mammary gland tissue, resulting in viral shedding through the milk alongside a large series of cases of infection in dairy farm workers in several USA locations. Despite well-documented zoonotic capability, no evidences of a sustained and efficient HPAI A(H5N1) viral transmission between people have been hitherto reported. If this were to happen sooner or later, a new pandemic might consequently arise. Therefore, keeping all this in mind and based upon the lessons taught by the COVID-19 pandemic, a “One Health, One Earth, One Ocean”-centered approach would be absolutely needed in order to deal in the most appropriate way with the HPAI A(H5N1) virus-associated zoonotic and pandemic risk.
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spelling doaj-art-5d42eae5014a4291bb3064c3d948fbf92025-08-20T03:26:56ZengMDPI AGVeterinary Sciences2306-73812025-06-0112656610.3390/vetsci12060566Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?Giovanni Di Guardo0General Pathology and Veterinary Pathophysiology, Veterinary Medical Faculty, University of Teramo, Località Piano d’Accio, 64100 Teramo, ItalyThe focus of this commentary is represented by the pandemic risk associated with the highly pathogenic avian influenza (HPAI) A(H5N1) virus, clade 2.3.4.4b. More in detail, the herein dealt pandemic alarm appears to be primarily justified by the huge and progressively growing number of virus-susceptible domestic and wild birds and mammals, including threatened marine mammal species like South American sea lions and elephant seals as well as harbour porpoises, bottlenose dolphins and polar bears. Of major concern is the susceptibility of dairy cattle to HPAI A(H5N1) virus, particularly the documented and unprecedented colonization of host’s mammary gland tissue, resulting in viral shedding through the milk alongside a large series of cases of infection in dairy farm workers in several USA locations. Despite well-documented zoonotic capability, no evidences of a sustained and efficient HPAI A(H5N1) viral transmission between people have been hitherto reported. If this were to happen sooner or later, a new pandemic might consequently arise. Therefore, keeping all this in mind and based upon the lessons taught by the COVID-19 pandemic, a “One Health, One Earth, One Ocean”-centered approach would be absolutely needed in order to deal in the most appropriate way with the HPAI A(H5N1) virus-associated zoonotic and pandemic risk.https://www.mdpi.com/2306-7381/12/6/566highly pathogenic avian influenza A(H5N1) viruscow H5N1cattle H5N1pandemicspandemic riskemerging infectious diseases
spellingShingle Giovanni Di Guardo
Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
Veterinary Sciences
highly pathogenic avian influenza A(H5N1) virus
cow H5N1
cattle H5N1
pandemics
pandemic risk
emerging infectious diseases
title Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
title_full Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
title_fullStr Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
title_full_unstemmed Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
title_short Highly Pathogenic Avian Influenza A(H5N1) Virus: How Far Are We from a New Pandemic?
title_sort highly pathogenic avian influenza a h5n1 virus how far are we from a new pandemic
topic highly pathogenic avian influenza A(H5N1) virus
cow H5N1
cattle H5N1
pandemics
pandemic risk
emerging infectious diseases
url https://www.mdpi.com/2306-7381/12/6/566
work_keys_str_mv AT giovannidiguardo highlypathogenicavianinfluenzaah5n1virushowfararewefromanewpandemic