Stop the Flu: Protect Yourself and Those Around You One-stop for the entire family. We have preservative-free, quadrivalent, and high dose vaccines available. Insurance will be billed. Brooten Medical Center - Walk-In Flu Vaccine Available: Monday - Friday, 9a - 4p Starbuck Medical Center - Walk-In Flu Vaccine Available: Monday - Friday, 8:30a – 4p