The Department of Agriculture has not yet fully identified the specific strain of the H7 virus found at the farm. Authorities believe migratory birds are primarily responsible for spreading avian influenza, though a 2015 analysis by the U.S.D.A. Last year, there was one reported incident of deadly avian flu in the United States, which affected a turkey farm in Indiana. South Korea was the first country to announce a ban on imports of United States chicken and eggs after the announcement of Tennessee outbreak. The country has itself been fighting an avian flu outbreak, culling 34 million birds so far this year.

Source: New York Times March 06, 2017 20:15 UTC