Every year different places offer an incentive for getting the flu shot.
CVS offers a $5 off $20 coupon for no cost flu shot (insurance).
Walgreens: Earn $10 in Wags cash when you spend $1+
Giant eagle: $5 gift card (insurance)
RiteAid $5 off $25
Safeway 10% off, up to $20 off
Will add more as they become available. You’ll probably want to wait until later in the year for maximum effectiveness.