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CDC — Situation Update: Summary of Weekly FluView

January 11, 2013

Situation Update: Summary of Weekly FluView

Source: Centers for Disease Control and Prevention

The United States is having an early flu season with most of the country now experiencing high levels of influenza-like-illness (ILI). In this week’s FluView report, some key flu activity indicators continued to rise, while others fell. It’s too soon to say exactly what this means; but some regions may have peaked, while other parts of the country are still on the upswing. This FluView update contains data for the week between December 30, 2012 and January 5, 2013.

Below is a summary of the key indicators:

  • The proportion of people seeing their health care provider for influenza-like illness (ILI) decreased from 6.0% to 4.3% for the week ending in January 5, but remains above the national baseline for the fifth consecutive week.
  • Twenty-four states and New York City are now reporting high ILI activity. Last week 29 states reported high ILI activity. Additionally, 16 are reporting moderate levels of ILI activity; an increase from 9 states in the prior week. States reporting high ILI activity for the week ending January 5, 2013 include Alabama, Colorado, Delaware, Georgia, Illinois, Iowa, Kansas, Louisiana, Michigan, Minnesota, Mississippi, Missouri, New Jersey, New Mexico, North Carolina, North Dakota, Oklahoma, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Virginia, and West Virginia.
  • Forty-seven states reported widespread geographic influenza activity for the week between December 30, 2012 and January 5, 2013. This is an increase from 41 states in the previous week. Geographic Spread data are based on assessments made by each state health department and show how many areas within a state or territory are seeing flu activity. The assessments made by each state health department are based on the detection of outbreaks of flu, increases in the percent of people visiting the doctor with flu-like symptoms, and patients with laboratory-confirmed influenza.
  • Since October 1, 2012, 3,710 laboratory-confirmed influenza-associated hospitalizations have been reported; an increase of 1,443 hospitalizations from the previous week. This translates to a rate of 13.3 influenza-associated hospitalizations per 100,000 people in the United States.

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