Another worth noting is if an antivaxxer says "we don't know what they put into vaccines", respond with "we don't know what they put in painkillers and yet you take them no problem". Nine times out of ten, these antivaxxers would take painkillers willy nilly without question. Saying this makes them question their line of thought. Heck, the same could be said just about anything. We don't know what cooks in restaurants put into the food we ordered, and yet there is no significant movement advocating to stop ordering takeaways or eating outside of home.