A California study of H1N1 influenza, reported in Nov. 4 JAMA (Journal of the American Medical Association), showed that this strain seems to affect younger and obese patients. The median age was 27 years. Of 268 adults aged 20 years or older, 58% was obese (body mass index >30.)
Among studied patients, 11% died. The most common causes of death were viral pneumonia and acute respiratory distress syndrome.
Authors of the study recommended doctors give antiviral treatment to all hospitalized patients with 2009 H1N1 infection as soon as possible, regardless of when symptoms start.
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