Influenza — Worldwide/Unknown
The U.S. influenza surveillance system is a collaboration between CDC and federal, state, local, and territorial partners and uses 8 data sources to collect influenza information, 6 of which operate year-round.
During 24 May-5 Sep 2015, World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories in the United States tested 80 345 specimens for influenza; 698 (2.1 percent) were positive for influenza . Of the 1698
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