Experts suspect the current spread of bird flu in Asia, Africa and Europe is mainly a result of trade in infected live birds rather than transmission through wild birds, the U.N. official coordinating the global fight against avian influenza said Friday.
Dr. David Nabarro said investigators looking into the cause of a bird flu outbreak at a commercial turkey farm in Britain are now focusing on a possible link with the transfer of partly processed birds from a farm in southeastern Hungary where there was an outbreak last month.
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