Drive-Thru Flu Shot Clinic One-stop for the entire family. We have preservative-free, quadrivalent, and high-dose vaccines available. All of our influenza vaccines are preservative-free and quadrivalent (helps protect against 4 flu strains). High dose, for those age 65 and older, is available. For a smooth process, please: Bring insurance information. Insurance will be billed. Wear...