The Flu-O-Meter is based on data released each week by the Centers for Disease Control and Prevention. Last updated on March 11, 2013.
None: The flu is absent or was not reported. Low (sporadic): Influenza infections noted but none affecting schools, nursing homes, or other institutional settings. Medium (regional): Outbreaks in areas of state holding less than 50% of population. High (Widespread): Outbreaks in areas with more than 50% of population.
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