— Topic

CDC

2 briefings

Global Alert: H5N1 Strains Show Efficiency in Human Replication as Case Counts Rise

New data reveals a concerning rise in human H5N1 cases linked to dairy cattle, with identifying mutations that may hinder standard treatments. Global health agencies call for immediate surveillance upgrades.

Dec 15, 2025 3 min read

H5N1

H5N1 Mutations Signal 'Increasing Flexibility' for Mammalian Infection, Raising Global Pandemic Alarm

New data reveals critical genetic shifts in the H5N1 virus, including the E627K mutation, enabling efficient replication in mammals and humans. Health agencies ramp up preparedness as the virus breaches the species barrier.

Dec 14, 2025 4 min read