H5N1 is a highly pathogenic avian influenza virus that has sparked waves of concern as it crosses borders, threatens wildlife, and prompts human health vigilance.
Public health teams are expanding disease surveillance for the 2026 World Cup across the U.S., Canada and Mexico. The effort includes wastewater testing, social-media monitoring and data-sharing with hospitals, aiming to detect outbreaks early as millions attend the tournament.
New Zealand has confirmed its first mainland detection of H5 bird flu after a brown skua found on Petone beach has tested positive. Authorities have said there is no evidence of mass mortality or poultry infection, but surveillance and a targeted vaccination programme for endangered captive birds have been activated as officials monitor wild populations.