Weekly U.S. Influenza Surveillance Report
The CDC Influenza Division collects, compiles, and analyzes information on influenza activity year-round in the US and produces FluView, a weekly influenza surveillance report. During week 3, ending January 21, the geographic spread of influenza in Puerto Rico and 37 states was reported as widespread; Guam and 12 states reported regional activity; the District of Columbia and one state reported local activity.
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