CDC Flu Map: Week Ending 12/08/12

Data collected in ILINet are used to produce a measure of ILI activity* by state. Activity levels are based on the percent of outpatient visits in a state due to ILI and are compared to the average percent of ILI visits that occur during spring and fall weeks with little or no influenza virus circulation. Activity levels range from minimal, which would correspond to ILI activity from outpatient clinics being below the average, to high, which would correspond to ILI activity from outpatient clinics being much higher than average.
During week 49, the following ILI activity levels were experienced:

• Eight states experienced high ILI activity (Alabama, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, and Texas).
• Two states experienced moderate ILI activity (Missouri and Virginia).
• New York City and nine states experienced low ILI activity (Colorado, Delaware, Florida, Illinois, Kansas, New York, Ohio, Utah, and Wyoming).
• Thirty-one states experienced minimal ILI activity (Alaska, Arizona, Arkansas, California, Connecticut, Hawaii, Idaho, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, North Dakota, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Vermont, Washington, West Virginia, and Wisconsin).
• Data were insufficient to calculate an ILI activity level from the District of Columbia.