U.S. bird experts mystified by Midwest avian flu spread

Tom Polansek, Reuters
Friday, 20 March 2015
By Tom Polansek, Reuters

March 15, 2015- Although the virulent strain of avian flu that has affected poultry in numerous states in the U.S. has been identified as nearly identical to viruses isolated in migratory ducks, how the virus is spreading can't be explained by the ducks' flight patterns, say experts.  READ MORE 

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