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Experts warn bird flu virus changing rapidly in largest ever outbreak
Webby, who is a researcher at St Jude Children's Research Hospital in the US city of Memphis, told AFP it was "absolutely" the largest outbreak of avian influenza the world had seen.
The virus has also been detected in a soaring number of mammals, which Webby described as a "really, really troubling sign".
By: NewVision Reporter, Journalist @NewVision
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PARIS - The virus causing record cases of avian influenza in birds across the world is changing rapidly, experts have warned, as calls increase for countries