Update: Influenza Activity — United States, September 29, 2013–February 8, 2014

  • 21 February 2014
    • journal article
    • Vol. 63  (7) , 148-154
Abstract
Influenza activity in the United States began to increase in mid-November and remained elevated through February 8, 2014. During that time, influenza A (H1N1)pdm09 (pH1N1) viruses predominated overall, while few B and A (H3N2) viruses were detected. This report summarizes U.S. influenza activity* during September 29, 2013-February 8, 2014, and updates the previous summary.