H5N1 Reaches Australia—the Last Continent Falls to a Spreading Flu Strain

H5N1 clade 2.3.4.4b, detected in seabirds at Cape Le Grand National Park in June 2026, marks Australia's first recorded case of the strain circulating globally since 2021. The virus likely traveled via migratory birds using coastal routes. Australia's poultry industry now faces spillover risk; any farm outbreak could trigger trade suspensions and mass culling protocols.