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Nature 433, 788 (24 February 2005) | doi:10.1038/433788a; Published online 23 February 2005

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Flu gene discovery prompts calls for tighter monitoring

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Lab-made virus from 1940 may have found its way into Korean pigs.

Genes from a flu strain created in a lab in 1940 have been found in samples taken from pigs in South Korea, a US biologist claims.Data from the flu virus samples were put last October in GenBank, the public database of genetic sequence information, by researchers at Chungnam National University in Daejon, South Korea.

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