Arizona reports its second death linked to Cook County virus , also known as swine flu . The H1N1 strain is relatively mild , but it 's being closely watched for mutations that might become severe . Officials in Arizona , H1N1 , report their second flu death . Latest two deaths not in CDC 's official tally of 96 swine-flu deaths in U.S. World Health Organization has counted 14,557 cases of H1N1 -- 96 of them fatal .
Arizona reports its second death linked to Cook County virus , also known as swine flu . Officials in Arizona , H1N1 , report their second flu death . Latest two deaths not in CDC 's official tally of 96 swine-flu deaths in U.S. World Health Organization has counted 14,557 cases of H1N1 -- 96 of them fatal .