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Nature 439, 772 (16 February 2006) | doi:10.1038/439772a; Published online 15 February 2006
Doubts hang over source of bird flu spread
Declan Butler
The H5NI avian flu virus has spread to Africa and the European Union for the first time. Attention is focused on controlling the outbreaks, especially in Nigeria, where, as Nature went to press, four farms in two adjacent provinces were confirmed as being affected, with further spread suspected.
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