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H5N1 D1.1 spread through North American wild birds as surveillance tracked a fast-moving 2024 wave
Key Takeaways
- Nature Medicine reports that genotype D1.1 was first detected in September 2024 and spread rapidly during fall migration.
- The study says D1.1 displaced earlier A(H5) genotypes across several North American flyways.
- The authors report 17 human cases linked to the broader expansion period, while noting mammalian-adaptive markers seen in humans were not found in wild-bird viruses.
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DT Editorial Team··via nature.com