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2012/2013 Flu Update #9

Update #9 for the week of February 24, 2013

State/Territorial Influenza Estimates (CDC)
This weeks Mitigation Journal Flu Update includes publicly available data from the CDC FluView, Google Flu Trends, Sickweather and other media sources.

This report contains data from the Centers for Disease Control and Prevention 2012/2013 Influenza season week 7 for the period ending February 16, 2013. In this reporting period (February 10-16, 2013)  CDC flu data report ILI activity elevated in the United States. Indications continue to point to declining ILI in most areas.

The number of hospitalizations remained elevated at 34.2 per 100,000 population during this reporting period. Those greater than 65 years of age continue to account for greater than 50% of those hospitalized. Influenza and pneumonia related deaths are reported to be above the epidemic threshold.

Twenty-two states reported widespread ILI activity during this reporting period, down from twenty-four states reported high level of ILI activity in week four and from twenty-six states in  week3.

Viral surveillance results for week 9, 2013 shows 16.8%  of 8,144 samples tested positive for influenza. This is down from week 4 where 25.5% of 10,581 samples were positive.

Outpatient ILI surveillance (those seen at clinics and doctors offices for ILI complaints) was 2.8% for week 7, down from 4.2% for week 4 and 4.3% for week 3,  but  remaining above the national base line of 2.2%.

Antiviral resistance is a non-issue at this point. None of the circulating strains (H1N1, H3N2 or Influenza B) are resistant to Oseltamivir or Zanamivir.

State-by-State week 7 reporting (from CDC website)
  • Widespread influenza activity was reported by 22 states (Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Idaho, Indiana, Iowa, Kansas, Massachusetts, Michigan, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Virginia, Washington, and Wyoming).
  • Puerto Rico and 21 states reported regional influenza activity (Florida, Kentucky, Illinois, Louisiana, Maine, Maryland, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, North Dakota, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, West Virginia, and Wisconsin).
  • The District of Columbia and 6 states (Alabama, Georgia, Hawaii, Mississippi, North Carolina, and Rhode Island) reported local influenza activity.
  • One state (Delaware) reported sporadic influenza activity.
  • Guam reported no influenza activity.
  • The U.S. Virgin Islands did not report.


CDC Flu Interactive Map

Google Flu Trends

Sickweather Data
Sickweather video no longer available


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