The CDC says there may be signs flu activity is leveling off, but the threat is far from over. The most severe flu season in nearly a decade has taken a heavy toll, killing 84 children. About three-quarters of them were not vaccinated. Dr. Tara Narula shows how the the virus can quickly turn deadly.
From: http://www.cbsnews.com/video/how-the-flu-becomes-deadly/
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