Judi Van Hulzen, RN, with Marion County Public Health tells KNIA KRLS News that three strains of flu are already circulating in Iowa – H1N1, H3N2, and Influenza B. Van Hulzen says while influenza activity remains low, the identification of three circulating strains means that without a flu vaccination, an individual could become ill with the flu three different times. The flu vaccines available this season cover at least three strains of flu. Influenza vaccinations can be obtained at your doctor’s office or at any of the local pharmacies.