In 2011, there were seven cases of mumps or 0.3 cases per 100,000 persons, a 68.8 percent decrease over the previous three year average of 26. Case ages in 2011 ranged from five to 47 years with a median age of 22.5 years. There were no outbreaks in Iowa in 2011.
In 2006, Iowa was the center of the largest mumps outbreak in 20 years in the US with 1,963 confirmed and probable cases. Prior to 2006, most cases were typically imported from countries with endemic disease.
For more detailed information and statistics on all notifiable diseases, please see our current annual report.