『H5N1 Avian Flu Surges Globally: 175 Million Birds Lost, Human Cases Rise, Experts Warn of Expanding Pandemic Risk』のカバーアート

H5N1 Avian Flu Surges Globally: 175 Million Birds Lost, Human Cases Rise, Experts Warn of Expanding Pandemic Risk

H5N1 Avian Flu Surges Globally: 175 Million Birds Lost, Human Cases Rise, Experts Warn of Expanding Pandemic Risk

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 Avian Flu Watch: Global H5N1 Tracker

Welcome to Avian Flu Watch: Global H5N1 Tracker, your data-driven update on the worldwide spread of highly pathogenic avian influenza. Im here with the latest from Lanviras Flock Watch bi-weekly report as of December 5, 2025, PAHO, WOAH, and regional surveillance.

Geographic hotspots dominate the picture. In the US, poultry losses exceed 175 million birds across all 50 states per Infection Control Today, with northern Indiana driving sustained activity. A fatal H5N5 human case in Washington state marks the first for this strain, linked to backyard flocks with wild bird exposure; no human-to-human spread detected. Europes 2025 totals surpass prior years, with 577 poultry outbreaks in 13 countries per European Commission data cited in Flock Watchnearly 90 new ones in late November alone. France reports 68 outbreaks since October, culling nearly 800,000 birds, including vaccinated ducks; Germany leads wild bird cases at over 2,800 yearly, plus one H5N5 in Scotland. The UK confirms multiple December outbreaks in England, like large flocks in Lincolnshire and Norfolk per GOV.UK.

Asia sees Japan with six broiler outbreaks since mid-October, totaling over 120,000 birds; South Korea at six laying hen events, including 130,000 birds; India with five Uttarakhand flocks over 21,000 birds; Iraq resuming after a gap. Africa rebounds: Nigeria with clustered backyard losses post-five-month silence, South Africa culling 150,000 on one farm plus 40 wild birds, per WOAH. The Americas log 508 bird outbreaks in nine countries via PAHO, with South America showing convergent routesavian from Argentina to Brazil and Uruguay, pinniped-adapted from Chile per phylogeographic analysis in PMC.

Visualize trend lines: Europes poultry curve spikes upward, crossing 2023-2024 peaks; US dairy cattle infections plateau after clades B3.13 and D1.1 adaptations; global wild bird detections form a migratory wave from Asia-Europe to Americas since 2021 per Nature and ECDC. Comparative stats: H5N1 clade 2.3.4.4b infects over 200 mammal species worldwide; WHO notes 991 human cases since 2003 at 48% fatality, with Chinas four new pediatric H9N2 undisclosed until now.

Cross-border patterns highlight wild bird migrations as primary vectors, impossible to fully control, enabling mammal jumps like dairy cows via open barns. South Americas dual phylogroups underscore this: wild bird-poultry from Andean Argentina, marine mammal strains dispersing inland with PB2 mutations Q591K and D701N.

Containment mixed: UKs rapid culling and zoning succeeds locally; Frances vaccination falters in ducks. Failures include undetected reassortments, like Argentinas 2025 event acquiring LPAI segments.

Emerging variants: H5N5 in US humans and Europe wild birds; mammal-adapted H5N1 persisting.

Travel advisories: CDC urges avoiding sick birds, unpasteurized dairy; enhance biosecurity. No broad restrictions, but monitor WOAH updates.

Thanks 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 vigilant.

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