H5N1 Mutation Could Heighten Human Risk, Study Warns 
A single mutation in H5N1 bird flu could ease human transmission, says new study. Vigilance urged as scientists decode risks.
H5N1
H5N1 Mutation Could Heighten Human Risk, Study Warns
WHO Sounds Alarm: Step Up Bird Flu Monitoring 
WHO urges countries to boost bird flu surveillance after a child in the U.S. tested positive. Here’s why experts are concerned. 
U.S. Detects First Pig Case of H5N1 Bird Flu 
First U.S. H5N1 case detected in a pig on an Oregon farm. Officials stress low public risk, but experts warn of potential viral mutations.
First U.S. H5N1 Bird Flu Case Found in Pig 
The USDA confirms the first U.S. H5N1 bird flu case in a pig on an Oregon backyard farm. While risks remain minimal, experts urge vigilance.
Deadly Bird Flu Outbreak Hits Antarctica 
Scientists warn of H5N1 bird flu spreading in Antarctica, threatening wildlife. Global efforts urged to curb the outbreak. 
