Bird Flu Spreads Rapidly Worldwide: Global Cases Surge in Poultry and Wildlife, Experts Warn of Potential Human Transmission Risk
29 December 2025

Bird Flu Spreads Rapidly Worldwide: Global Cases Surge in Poultry and Wildlife, Experts Warn of Potential Human Transmission Risk

Bird Flu Bulletin: Daily H5N1 Update

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Bird Flu Bulletin: Daily H5N1 Update

Monday, December 29, 2025.

Good evening, this is your Daily H5N1 Update. I'm your host.

Top Stories from the last 24 hours.

First, South Korea reports two more bird flu cases in poultry farms, bringing the seasonal total to 26, according to Anadolu Agency. These H5N1 outbreaks prompt heightened biosecurity measures in affected regions.

Second, the FAO's latest global avian influenza update through late November shows 1738 high-pathogenicity H5 and H5N1 outbreaks in animals across 41 countries since October 23, with the US leading at 689 events in wild birds, mammals like polar bears, and poultry. That's a sharp rise from prior periods.

Third, Europe's wild bird infections have quadrupled year-over-year, with 1444 cases across 26 countries from early September to mid-November, per Science Alert, signaling intensified circulation ahead of winter migrations.

Case numbers today: No new US human H5N1 cases reported, steady at 71 since early 2024 per WHO and CDC data through November. Globally, human infections remain sparse at around 992 since 2003, though with high fatality risks. CDC's week 50 flu report notes rising seasonal influenza A at 14.8% positivity, but no H5N1 spikes in surveillance of over 30,600 exposed individuals.

Health authorities: CDC maintains monitoring of 21,300 people exposed to infected animals since March 2024, with no novel transmissions. WHO highlights the first global H5N5 human case in the US in November, urging vigilance.

Now, a brief word from Dr. Marion Koopmans, virologist at Erasmus Medical Center. In a recent Science Alert interview, she warned: "The world is sleeping on bird flu. Wildlife reservoirs are exploding, and spillover risk to humans is growing with every unchecked outbreak. We need global preparedness now."

Looking ahead: Expect tomorrow's updates on potential new poultry culls in South Korea and Europe, plus CDC's week 51 flu data. Watch for migration-driven surges in the US and Asia.

Thank you for tuning in. Come back next week for more. This has been a Quiet Please production. For me, check out Quiet Please Dot A I. Stay safe.

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