Most who died from swine flu had other underlying problems...

Most of the people who have died from the new pandemic H1N1 flu had underlying conditions such as asthma, but 45 percent seemed healthy, according to the largest study yet of U.S. cases.

Children with sickle cell and other blood diseases have a special risk from the swine flu, just as they do from seasonal influenza, Dr. Anne Schuchat of the U.S. Centers for Disease Control and Prevention said on Tuesday.

She said injectable versions of the flu vaccine -- suitable for babies, people with asthma and people 50 and older -- will be available this week. More...

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