AI Summary

A recent study has found that only a small number of viral particles are required to cause infection in cows with the H5N1 avian flu. The research suggests that the virus has a particular affinity for cow mammary glands, which may contribute to the challenges in containing and preventing the disease. This characteristic could complicate efforts to control the outbreaks, particularly in dairy cattle where the virus has caused hundreds of influenza outbreaks in the US.

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