National Geographic
The number of influenza cases is surging across the United States, putting significant strain on many hospitals. We asked the experts to explain what makes this year’s flu season so unusual.
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Why this is the worst flu season in 15 years
Daryl Austin
10:30
The number of influenza cases is surging across the United States, putting significant strain on many hospitals. We asked the experts to explain what makes this year’s flu season so unusual.
