Get a Flu Shot! Polk County Flu Shot Clinic Schedule Flu Vaccinations Most major insurances accepted- please bring your card. $20 fee for people without health insurance. No one will be turned away because of inability to pay. Walk-ins are welcome at Polk County Health Department, 1907 Carpenter Ave, 9 am to 4:30 pm Monday- Friday and Tuesdays until 7 pm through the end of flu season. Please click here for the schedule.