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flag Scientists find a mutation in bird flu virus H5N1 that could enable human-to-human transmission.

flag A recent study published in Science suggests that a single mutation in the H5N1 bird flu virus could enable it to bind more effectively to human cells, potentially leading to human-to-human transmission. flag This mutation, identified in the hemagglutinin protein, has not yet been observed in real-world cases but has been tested in lab settings. flag The H5N1 virus has already caused human infections in the U.S., and experts are concerned about its potential to evolve into a pandemic strain.

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