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Health News & Updates
During week 6 (February 5-11, 2017), influenza activity increased in the United States.
This report summarizes U.S. influenza activity* during October 2, 2016–February 4, 2017,† and updates the previous summary (1). Influenza activity in the United States began to increase in mid-December, remained elevated through February 4, 2017, and is expected to continue for several more weeks. To date, influenza A (H3N2) viruses have predominated overall, but influenza A (H1N1)pdm09 and influenza B viruses have also been identified.