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2012/2013 Flu Update #10

Update #10 for the week of March 4, 2013

CDC Flu Surveillance Map Week 8
This weeks Mitigation Journal Flu Update includes publicly available data from the CDC FluView, Google Flu Trends and other media sources.

This report contains data from the Centers for Disease Control and Prevention 2012/2013 Influenza season week 8 for the period ending February 23, 2013. In this reporting period (February 17-23, 2013)  CDC flu data report ILI activity elevated but decreasing in most areas of the United States.


The number of hospitalizations remained elevated at 36.7 (up from 34.2 last week) 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 8, 2013 showed 16.9% of 7,609 samples testing positive for influenza. This is basically unchanged from last week when 16.8% of 8,144 samples were positive.

Outpatient ILI surveillance (those seen at clinics and doctors offices for ILI complaints) was 2.7% for week 8, nearly unchanged from the 2.8% reported during week 7,  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 8 reporting (from CDC website)
  • Widespread influenza activity was reported by 12 states (Connecticut, Indiana, Massachusetts, Michigan, Nevada, New Jersey, New York, Ohio, Oklahoma, Oregon, Pennsylvania, and Virginia).
  • Puerto Rico and 28 states reported regional influenza activity (Alaska, Arizona, Arkansas, California, Colorado, Florida, Idaho, Iowa, Kansas, Kentucky, Illinois, Maine, Maryland, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Carolina, North Dakota, Tennessee, Texas, Utah, Vermont, Washington, West Virginia, Wisconsin, and Wyoming).
  • The District of Columbia and 7 states (Georgia, Louisiana, Mississippi, New Hampshire, Rhode Island, South Carolina, and South Dakota) reported local influenza activity.
  • Three states (Alabama, Delaware, and Hawaii) reported sporadic influenza activity.
  • Guam reported no influenza activity.
  • The U.S. Virgin Islands did not report.


CDC Flu Interactive Map


Google Flu Trends

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