CDC issues report on flu activity in the United States

ATLANTA — Influenza activity in the United States decreased across several indicators, the Centers for Disease Control and Prevention reported Friday, though the agency projected that illness rates for the season have not yet peaked.

Of all influenza A viruses tested since Oct. 30, 2010, only 15.8% were identified as the 2009 H1N1 virus; 44.6% of the specimens were identified as an H3N2 virus. That virus is similar to the H3N2 component of the 2010-2011 triumvirate influenza vaccine.

The proportion of outpatient visits for influenza-like illness was 2.9%, which is above the national baseline of 2.5%. Four states experienced high ILI activity: Alabama, Georgia, Louisiana and Oklahoma. Thirty states continue to record only minimal ILI activity.