HONG KONG (Reuters) - The H1N1 swine flu virus has been spreading quietly in pigs in Hong Kong and swapping genes with other viruses, and researchers said the findings support calls for tighter disease surveillance in pigs before new bugs can emerge and infect people.
The finding, published in Science on Friday, is important as it supports the theory that flu viruses infecting swine can swap genes with other viruses that are in pigs, including more dangerous bugs like the H5N1 or H9N2 bird flu viruses.
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