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  • Status of ongoing avian influenza response by province - Canada
    This table lists the estimated number of birds in flocks impacted by avian influenza subtype H5 by province The number of impacted birds includes domestic birds that died from the virus and those that were humanely depopulated by the CFIA
  • How we’re tracking avian flu’s toll on wildlife across North America
    Since first being detected in Newfoundland in 2021, a subtype of highly pathogenic avian influenza, HPAI A (H5Nx), has had a dramatic impact on North America The poultry industry has suffered the most, with almost 15 million birds dying or being culled to control the virus in Canada
  • A (H5) Bird Flu: Current Situation | Bird Flu | CDC
    CDC is using its flu surveillance systems to monitor for A (H5) bird flu activity in people On July 7, 2025, CDC streamlined A (H5) bird flu updates with routine influenza data updates and updated reporting cadences to reflect the current public health situation
  • North American perspective on the highly pathogenic avian influenza . . .
    Influenza A (H5Nx) highly pathogenic avian influenza viruses of clade 2 3 4 4b were first detected in North America in late 2021, initiating a multi-year outbreak unprecedented in geographic extent, duration, and host range Surveillance conducted across Canada, the United States, and Mexico has documented widespread detections in wild birds and poultry, and repeated spillover into wild and
  • CCOHS: Canadian Centre for Occupational Health and Safety
    One subtype of avian influenza, a highly pathogenic avian influenza called A (H5N1), causes severe disease and mortality in domestic poultry, some species of wild birds (particularly water birds), and some species of mammals
  • H5N1 Highly Pathogenic Avian Influenza A Virus (Bird Flu)
    Preliminary analyses indicate that these H5 vaccines could provide good protection against the avian influenza A (H5N1) virus However, they are not available in Canada for public use
  • Updated joint FAO WHO WOAH public health assessment of recent high . . .
    To date, HPAI A(H5) viruses have been detected in birds and or mammals across all continents except Oceania The predominant H5 virus clades currently circulating worldwide derive from clades 2 3 2 1 and 2 3 4 4
  • Avian influenza A (H5N1): Canada’s response - Canada. ca
    On November 13, 2024, the Public Health Agency of Canada confirmed a human case of A (H5N1) in Canada This is the first instance of a human case of A (H5N1) that came from transmission within Canada
  • Epidemiological Update Avian Influenza A(H5N1) in the Americas Region
    Driven by the movement of migratory wild birds, especially waterfowl, the global spread of the influenza A(H5N1) virus in recent years has coincided with increased influenza A(H5N1) detections in non-avian species, including wild and domestic terrestrial and marine mammals (1, 5) Since 2021, reported highly pathogenic avian influenza (HPAI1) cases in mammals have shown a rise (6) As of
  • Influenza A virus subtype H5N1 - Wikipedia
    Influenza A virus subtype H5N1 (A H5N1) is a subtype of the influenza A virus, which causes the disease avian influenza (often referred to as "bird flu") It is enzootic (maintained in the population) in many bird populations, and also panzootic (affecting animals of many species over a wide area) [1]





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