From Sept. 28 to Dec. 6, almost 125,000 respiratory specimens in the United States were tested for influenza and 10.9% were positive, according to a CDC report published in MMWR.
The majority (89.3%) were influenza A viruses, and among those, 42.1% were subtyped. Almost all of the subtyped specimens (99.1%) were influenza A (H3) viruses. The remainder were influenza A (H1N1)pdm09 viruses. All 50 states, plus the District of Columbia, Guam and Puerto Rico, have reported positive influenza tests.
