20 States Report High Flu Activity With (H1N1) the predominant circulating virus

Key Flu Indicators

According to this week's FluView report, flu activity in the United States continues to increase.

Influenza A (H3N2), 2009 influenza A (H1N1), and influenza B viruses have all been identified in the U.S. this season. To date, influenza A (H1N1) viruses have predominated. During the week of December 22-28, 1,667 of the 1,711 influenza-positive tests reported to CDC were influenza A viruses and 44 were influenza B viruses. Of the 922 influenza A viruses that were subtyped, 0.8% were H3 viruses and 99.2% were 2009 H1N1 viruses.

Twenty-five states are now reporting widespread levels of activity and the following twenty states experienced high ILI activity: (Alabama, Arkansas, Colorado, Georgia, Idaho, Illinois, Indiana, Kansas, Louisiana, Mississippi, Missouri, Nevada, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Utah, and Virginia).
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Eight states and New York City experienced moderate ILI activity (Alaska, Delaware, Kentucky, Minnesota, Montana, Pennsylvania, North Dakota, and Oregon).

Six states experienced low ILI activity (Florida, Massachusetts, Michigan, South Dakota, Washington, and Wisconsin).

Sixteen states experienced minimal ILI activity (Arizona, California, Connecticut, Hawaii, Iowa, Maine, Maryland, Nebraska, New Hampshire, New Jersey, New York, Ohio, Rhode Island, Vermont, West Virginia, and Wyoming).

Data were insufficient to calculate an ILI activity level from the District of Columbia.

http://www.cdc.gov/flu/weekly/summary.htm