Migratory wild birds can carry the H5N1 avian influenza virus and facilitate geographic spread of the virus across regions.
November 06, 2025
high
general
Mechanism by which avian influenza spreads across broad areas via bird migration.
H5N1 avian influenza can spread easily when infected wild birds mix with commercial poultry or backyard flocks.
November 06, 2025
high
general
Intermixing of wild and domestic birds increases transmission risk on farms and in backyard settings.
Pre-existing immunity from seasonal influenza strains may provide some partial protection if an avian influenza virus such as H5N1 infects humans.
November 06, 2025
medium
general
Cross-protection from prior seasonal influenza exposures can influence human susceptibility to novel influenza viruses.
The influenza virus subtype H5N1 is a form of highly pathogenic avian influenza (HPAI) that is associated with serious risks to animal and human health and with potential impacts on trade.
November 06, 2025
high
temporal
H5N1 characterization and its implications for health and trade.
Canadian authorities plan for humane depopulation measures with veterinary oversight at infected premises when managing confirmed H5N1 cases.
November 06, 2025
high
temporal
Operational approach to confirmed H5N1 infections on animal premises in Canada.
The distinction between the H5N5 and H5N1 avian influenza subtypes involves a viral protein that facilitates release of the virus from infected cells and promotes spread to surrounding cells.
high
virology
Molecular difference between H5N5 and H5N1 subtypes
The distinction between influenza A subtypes H5N5 and H5N1 involves a viral protein that helps release the virus from an infected cell and promotes spread to surrounding cells.
high
biological
Molecular difference between two H5 subtype viruses