NEW YORK — Three months ago, this flu season was shaping up to be short and mild in the U.S. But a surprising second viral wave has made it the longest in 10 years.
Two-wave US flu season is now the longest in a decade
Now at 21 weeks
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![flu.jpg](https://statesboroherald.cdn-anvilcms.net/media/images/2019/04/19/images/flu.max-752x423.jpg)
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