We all take that risk. Just as you could get an infection from an incompetent healthcare worker administering the vaccine, or be killed when the clinic you are getting the injection in collapses. Just as leaving your house could get you killed by a drunk driver. Just as your very next breath could contain nerve gas that could kill you. So decide. Which risk is worse? Will you stop breathing, lest you get poisoned? Will you stay inside forever, lest you get hit by a drunk driver? Most of us make better tradeoffs than that.