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Ohio Influenza Surveillance

The Ohio Department of Health tracks seasonal influenza activity on a weekly basis throughout the year.  ODH monitors circulating flu viruses and other related data sources and provides weekly summaries of influenza activity from October (Week 40) through May (Week 20). The first week of the new calendar year is indicated by "Week 1." 

 Flu hospitalization graph

Weekly Flu Activity Report  

 *This is the final week that seasonal influenza activity will be posted during the 2013-2014 influenza season.  However, The Ohio Department of Health will continue to monitor Ohio’s influenza activity throughout the year.

Final weekly report from 2012-2013 influenza season

Final weekly report from 2011-12 influenza season 

Final weekly report from 2010-11 influenza season


National Influenza Data

National influenza surveillance data published by The Centers for Disease Control and Prevention can be found here:

Additional Information about Influenza 

For more information about influenza prevention and treatment, please visit

Page updated: 5/1/2015