Suspected and Confirmed Norovirus Outbreaks Reported by State Health Departments in Minnesota, Ohio, Oregon, Tennessee, and Wisconsin to the National Outbreak Reporting System (NORS) by Week of Illness Onset, 2009-2015*.
*Incomplete outbreak data from 2009-12 was supplemented with information from state health department records.
- Page last reviewed: March 30, 2015
- Page last updated: March 30, 2015
- Content source: