A total of seven cases of a previously undetected strain of swine flu have been confirmed in the United States, the Centers for Disease Control and Prevention said. None of the patients has had direct contact with pigs.
CNN.com, CNN
Thu, 04/23/2009 - 1:42pm
A total of seven cases of a previously undetected strain of swine flu have been confirmed in the United States, the Centers for Disease Control and Prevention said. None of the patients has had direct contact with pigs.