JOHNSON Co., Iowa (KCRG) – This map of the US shows where flu activity is highest. Iowa is now in the “high” category when it comes to influenza. This comes at a time when the number of Iowans getting a flu shot is dropping. Those with the Johnson County Department of Public Health say they aren’t sure the reason fewer people are deciding to get the flu vaccine. According to state data, it’s the lowest rate since the pandemic.