In 2009, more than half of those hospitalized for H1N1 are under the age of 25. As Dr. Jon LaPook reports, doctors are still trying to understand why H1N1 can turn deadly in the healthy.
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Tue, 10/20/2009 - 4:00pm
In 2009, more than half of those hospitalized for H1N1 are under the age of 25. As Dr. Jon LaPook reports, doctors are still trying to understand why H1N1 can turn deadly in the healthy.