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A number of parameters indicate rapid spread in some US regions, with 2009 H1N1 the predominant strain.
News of a severe ILI cluster in Texas parallels a dramatic flu rise—mostly from H1N1—in the region and nation.
An flu-like illness cluster has hospitalized eight people with severe infections, four of them fatal, and tests show 2009 H1N1 flu in one of the survivors.
US flu activity showed a modest jump last week, with the clinic visits for flu-like illness rising above baseline for the first time this season.
Influenza activity in the United States edged slightly higher during Thanksgiving week.
The US flu season is picking up, and 2009 H1N1 is the dominant strain so far.
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CIDRAP - Center for Infectious Disease Research and PolicyOffice of the Vice President for Research, University of Minnesota, Minneapolis, MN
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